• Stainless Steel Valves Available on Sale, by India’s Largest Stockholder and Manufacturer in Seamless & Welded Form. Metallica makes it easy for you to source top quality stainless steel valves at the lowest prices in India. We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers. Metallica provides the value added services, such as the heat treating, cutting, machining, painting and assembly.   
  • Metallica  is the production of professional valve manufacturer, main products are valve,  butterfly valve, globe valve, ball valves, check valves, etc. more than 50 kinds of 600 multiple models of specifications, all in accordance with national standards, and achieved ISO 9000 series Standard certification.We have our own export company.
  • Our annual sales volume over 70,000 tonnes in India and Worldwide, has won us the dealership and distributorship of renowned seamless (JINDAL, ISMT) and welded steel pipes manufacturing companies across the globe. Till now, our products have been exported to Southeast Asia, Middle East Area, Europe, Australia, South America, Africa, etc. With advanced quality, competitive price and sincere service, we have obtained wide trust and support from domestic and abroad customers. Your Inquiry is Highly Appreciated. Email Us on sales@metallicametals.com | Call Us On +918928722715.
Stainless Steel Valve Manufacturer, Wholesaler, Dealer, Supplier and Distributor In India and Abroad
  • As one of the largest manufacturer of Stainless Steel Valves, we have over 6000 tons in stock

  • Stainless Steel Valves Available at around Rs. 200/KG for Sale in India.

  • Our Annual Sales Volume for Stainless Steel Valves is Over 25,000 tons in India and Overseas.

  • Stainless Steel Pipes and Tubes, are Sold with Complete Range of Related Pipe Fittings and Flanges

  • On-Time Delivery with Quality Assurance and Price Guarantee for Stainless Steel Valves.

Types of Stainless Steel Valves

201    (1Cr17Mn6Ni5N) 202    (1Cr18Mn8Ni5N)
304    (0Cr18Ni9) 304L  (00Cr18Ni10)
316    (0Cr17Ni12Mo2) 316L   (0Cr17Ni14Mo2)
321/321H 409
409L 430

Each type of stainless steel valve serves a very distinct purpose. Such valves are used in a number of industries around the world, including water management, chemical processing, and food production. Valves are quite diverse and may be classified into a number of basic types.

Valves can also be classified based on their functions:-

  1. Function
  2. End connection
  3. How it operates
  4. Types of Actuator it used.

Classification of Valves based on end connections:-

  1. Wafer and Lug end construction
  2. Screwed or threaded
  3. Flanged type ends

Classification of Valves based on actuator:-

The last way to classify the valve is, types of the actuator used to transfer the motion to operate the valve. The valve can be operated manually with the help of handwheel, lever, chain or by a gear wheel. An external power source such as an electric motor, air, hydraulic fluid or solenoid is used to operate valve from the control room. Check valve works automatically when subjected to the backflow.

  • Hydraulic
  • Pneumatic
  • Manual
  • Solenoid valve
  • Motor

 Classification of Valves based on mechanical motion:-

  1. Linear Motion Valves
  2. Rotary Motion Valves
  3. Quarter Turn Valves
Types of Valve, Butterfly Valve, Pressure Relief Valve, Ball Valve, Gate Valve, Check Valve, Globe Valve, Control Valve, Plug Valve, Diaphragm Valve, Needle Valve

Types of Valve, Butterfly Valve, Pressure Relief Valve, Ball Valve, Gate Valve, Check Valve, Globe Valve, Control Valve, Plug Valve, Diaphragm Valve, Needle Valve

Types Of Valves:

  1. Check Valve:- Check valves are commonly used for the prevention of back flow into a pipeline.
  2. Plug Valve:- A plug shaped valve that uses a tapered or cylindrical plug to stop or start the flow. Plug valve is Quarter-turn rotary motion Valve. Plug valve can be used in vacuum to high-pressure & temperature applications
  3. Pressure Relief Valve:-  Pressure Relief Valve also known as Pressure Safety Valve are used to protect equipment or piping system during an over pressure event or in the event of vacuum. This valve releases the pressure or vacuum at pre-defined set pressure.
  4. Gate Valve:- A stainless steel gate valve functions as an on/off valve. The gate or disc located inside the value is raised and then lowered while a handle is turned. Such valves are not ideally suited for regulating flow, and using them in that manner could result in damage to the disc mechanism. Two styles of gate valves are available: rising stem and non-rising stem. Gate valves are used in almost all fluid services such as air, fuel gas, feed water, steam, lube oil, hydrocarbon, and all most any services.
  5. Knife Valve:- Knife valves are actually similar in nature to gate valves. The main difference is that a knife valve is more compact than a gate valve.
  6. Butterfly Valve:- Butterfly valve is a quarter-turn rotary motion valve, used to stop, regulate, and start the flow.
  7. Ball Valve:- Ball valves are typically used as a type of on/off control without incurring a drop in pressure. These types of valves are ideally suited for situations requiring a quick shut-off. A 90-degree turn can complete a shut-off with this valve, as opposed to the multiple turns that would typically be necessary for manual valves.
  8. Disc Check Valve:- Disc check valves, also called as non-return valves allow the flow to pass through them in only one direction and stop the flow in reverse direction. Because of this unique directional property, disc check valves are essentially used for some critical applications in the steam systems. There are 4 major types:-
    • Diaphragm Valve:- In situations in which flow needs to be controlled with the movement of a diaphragm, a diaphragm valve is commonly used.
    • Lift Check Valve:- Lift check valves work simply on the principle of gravity.
    • Swing Check Valve:- In this kind of check valve, the disc or the closing element swings around a point to which it is hinged.
    • Spring loaded Check Valve:- In this kind of check valves, tight shut-off it provided using a spring.
  9. Globe Valve:- Globe valve is used to stop, start, and regulate the fluid flow. Globe Valves are used in the systems where flow control is required and leak tightness is also necessary. Globe valve provides better shut off as compared to gate valve and it is costlier than gate valve.
  10. Needle Valve:- Needle valves are similar to a globe valve in design with the biggest difference that is the sharp-pointed conical disc and matching seat. Needle valves are designed to give very accurate control of flow in small diameter piping systems.
  11. Pinch Valve:- Pinch valves consist of a plastic tube/sleeve which is made up of reinforced elastomers. The sealing/ closing action is achieved by throttling or pinching this sleeve/tube. Pinch valves are best suited for handling slurries and fluids having suspended solids. Pinch valves offer many benefits over the other types of valves. They can be used for handling corrosive fluids as there is no contact between the fluid carried and the actual valve mechanism. Generally, pinch valves are suitable for low pressure applications. When used with abrasive slurries, they should be used as on-off valves; if used for throttling purposes, the sleeve will get worn out.

Equivalent Grades of 304 Stainless Steel Valve

Standard 304 Stainless steel Valves 304L Stainless steel Valves 304H Stainless steel Valves
UNS S30400 S30403 S30409
WERKSTOFF NR. 1.4301 1.4306/1.4307 1.4301
AFNOR Z7CN18‐09 Z3CN18‐10
JIS SUS 304 SUS 304L
GOST 08Х18Н10 03Х18Н11
BS 304S31 304S11
EN X5CrNi18-10 X2CrNi18-9 / X2CrNi19-11

Chemical Composition of Stainless Steel Valve

ASTM A351 stainless steel valves, chemical composition
ASTM A351 GRADE UNS C Mn Si S P Cr Ni Mo Nb V N Cu
CF3+CF3A J9270 0.03 1.5 2.0 0.040 0.040 17.0-21.0 8.0-11.0 0.50
CF8+CF8A J9260 0.08 1.5 2.0 0.040 0.040 18.0-21.0 8.0-11.0 0.50
CF3M+CF3MA J9280 0.03 1.5 1.50 0.040 0.040 17.0-21.0 9.0-13.0 2.0-3.0
CF8M J9290 0.08 1.5 1.50 0.040 0.040 18.0-21.0 9.0-12.0 2.0-3.0
CF3MN J92804 0.03 1.5 1.50 0.040 0.040 17.0-21.0 9.0-13.0 2.0-3.0 0.10-.20
CF8C J92710 0.08 1.5 2.0 0.040 0.040 18.0-21.0 9.0-12.0 0.50 ( 1 )
CF10 J92950 0.04-0.10 1.5 2.0 0.040 0.040 18.0-21.0 8.0-11.0 0.50
CF10M J92901 0.04-0.10 1.5 1.50 0.040 0.040 18.0-21.0 9.0-12.0 2.0-3.0
CH8 J9340 0.08 1.5 1.50 0.040 0.040 22.0-26.0 12.-15.0 0.50
CH10 J93401 0.04-0.10 1.5 2.0 0.040 0.040 22.0-26.0 12.-15.0 0.50
CH20 J93402 0.04-0.20 1.5 2.0 0.040 0.040 22.0-26.0 12.0-15.0 0.50
CK20 J94202 0.04-0.20 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HK30 J94203 0.25-0.35 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HK40 J94204 0.35-0.45 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HT30 N08030 0.25-0.35 2.0 2.50 0.040 0.040 13.0-17.0 33.0-37.0 0.50
CF10MC   0.10 1.50 1.50 0.040 0.040 15.0-18.0 13.0-16.0 1.7-2.25 ( 2 )
CN7M N0807 0.07 1.50 1.50 0.040 0.040 19.0-22.0 27.5-30.5 2.0-3.0 3.0-4.0
CN3MN J94651 0.03 2.0 1.0 0.010 0.040 20.0-22.0 23.5-25.5 6.0-.0 0.18-.26 0.75
CE8MN   0.08 1.0 1.50 0.040 0.040 22.5-25.5 8.0-11.0 3.0-.5 0.10-.30
CG-6MMN J93790 0.06 4.0-6.0 1.0 0.030 0.040 20.5-23.5 11.5-13.5 1.50-3.0 0.10-.30 0.10-.30 0.20-.40
CG8M J9300 0.08 1.50 1.50 0.040 0.040 18.0-21.0 9.0-13.0 3.0-4.0
CF10SMnN J92972 0.10 7.0-9.0 3.50-.50 0.030 0.060 16.0-18.0 8.0-9.0 0.08-.18
CT15C N08151 0.05-0.15 0.15-.50 0.50-.50 0.030 0.030 19.0-21.0 31.0-.0 0.50-.50
CK-3MCuN J93254 0.025 1.20 1.0 0.010 0.045 19.5-20.5 17.5-19.5 6.0-7.0 0.18-.24 0.50-1.0
CE20N J92802 0.20 1.50 1.50 0.040 0.040 23.0-26.0 8.0-.0 0.50 0.08-.20
CG3M J92999 0.03 1.50 1.50 0.040 0.040 18.0-21.0 9.0-.0 3.0-4.0


  1. Grade CF8C shall have a Niobium content 8 times above the Carbon but not over 1.00%.
  2. Grade CF10MC shall have a Niobium content 10 times above the Carbon but not over 1.20%.

Mechanical Composition of Stainless Steel Valve

Minimum Steel Mechanical Properties Modulus Approximate
ASTM CAST GRADE Tensile strength
Yield strength
(psi min)
(at 2 inches)
Reduction of Area (%)    
ASTM A216 Grade WCB 70,000 36,000 22 35 27.9 137-1 87
ASTM A352 Grade LCB 65,000 35,000 24 35 27.9 137-1 87
ASTM A217 Grade C5 90,000 60,000 18 35 27.4 241 Max.
ASTM A217 Grade WC1 65,000 35,000 24 35 29.9 215 Max.
ASTM A217 Grade WC6 70,000 40,000 20 35 29.9 215 Max.
ASTM A217 Grade WC9 70,000 40,000 20 35 29.9 241 Max.
ASTM A352 Grade LC3 65,000 40,000 24 35 27.9 137
ASTM A217 Grade C12 90,000 60,000 18 35 27.4 180-240
ASTM A351 Grade CF-8 65,000 28,000 35 28 140
ASTM A351 Grade CF-8M 70,000 30,000 30 28.3 156-170
ASTM A126 Class B 31,000 160-220
ASTM A126 Class C 41,000 160-220
ASTM A395 Type 60-45-15 60,000 45,000 15 23-26 143-207
ASTM A439 Type D-2B 58,000 30,000 7 148-211
ASTM B62 30,000 14,000 20 17 13.5 55-65*
ASTM B143 Alloy 1A 40,000 18,000 20 20 15 75-85*
ASTM B147 Alloy 8A 65,000 25,000 20 20 15.4 98*
ASTM B148 Alloy 9C 75,000 30,000 12 min. 12 17 150
(Weldable Grade) 65,000 32,500 25 23 120-170
ASTM A494 (Hastelloy B) 72,000 46,000 6
ASTM A494 (Hastelloy C) 72,000 46,000 4
Stellite No. 6 121,000 64,000 01.feb 30.4
ASTM B211 Alloy 20911-T3 44,000 36,000 15 10.2 95
ASTM B16 1/2 Hard 45,000 15,000 7 50 14
ASTM B21 Alloy 464 60,000 27,000 22 55
AISI 12L 14 79,000 71,000 16 52 163
ASTM A108 Grade 1018 69,000 48,000 38 62 143
(Suitable for ASTM A193 Grade B7 bolt material) 135,000 115,000 22 63 29.9 255
ASTM A276 Type 302 85,000 35,000 60 70 28 150
ASTM A276 Type 304 85,000 35,000 60 70 149
ASTM A276 Type 316 80,000 30,000 60 70 28 149
ASTM A276 Type 316L 81,000 34,000 55 146
ASTM A276 Type 410 75,000 40,000 35 70 29 155
ASTM A461 Grade 630 135,000 105,000 16 50 29 275-345
Alloy K500 (K Monel) 100,000 70,000 35 26 175-260
ASTM B335 (Hastelloy B) 100,000 46,000 30
ASTM B336 (Hastelloy C) 100,000 46,000 20

What is a Valve?

valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. Valves are essential components of a piping system that conveys liquids, gases, vapors, slurries etc..

Functions of a Stainless Steel Valve

  1. Stopping and starting a fluid flow
  2. Relieve pressure or create vacuum in the piping system
  3. Regulating a flow or pressure within the piping system
  4. Throttling the fluid flow
  5. Controlling the direction of a fluid flow

Product Specification of a Stainless Steel Valve

Product 304 Stainless Steel Valves
Standards API 598/BS EN 12266-1, ASME B 16.10,Sizes available on request API 600/BS1414, 1/8 to 1”, ASME B 16.34, ASME B 16.5,ASME B 16.25
Sizes Sizes available on request,1/8 to 1”
Working Pressure Valves are also available which could handle higher pressure,Up to 6000 PSIG
End Connection BSPT, Male and Female NPT, Male to Female, Socket Weld (SW) or Dual Ferrule Tube Connections, Female to Female
Temperature Rating (232C)/Grafoil 700 F(371C),PTFE 450F
Pressure rating 150#,300#,600#,800#,1500#
Operating Mechanisms Outside Screw & Yoke, Rising Stem, Non Rising Stem

What is Forged Valve? What is Cast Valve? Difference Between Forged Valve and Cast Valve

All valves are indispensable parts of any industrial system, but not all valves are created in the same way. For example, some valves are forged and other valves are cast. Forging and casting are two of the most common ways to create high-quality valves. The biggest difference between forging vs casting valve methods is how they’re carried out.For both forged and cast valves the process begins with molten metal being poured into a mould. Shrinkage is a defect commonly shared by castings and forgings.

Forged valves are created using a forging method that involves shaping metals and alloys while they’re in their solid form. Heat and industrial-size tools deliver compressive forces to bend the metals and alloys, and dies are used to cut and shape the materials to create specific valves. Forging can be performed in most temperatures depending on the metals used.

  • Companies don’t have to worry about wasted materials. Since forged valves are shaped into one solid piece, little effort is needed to rework the material to achieve the proper shape and size.
  • Forged valves have a reputation for being strong, which make them ideal for handling high-pressure and high-temperature systems.
  • Increase in impact and overall strength.
  • Forging can create valves with less wall thickness.
  • Forged valves can be heated and cooled more quickly, which allows them to adequately handle the stresses of systems that continuously cycle through start-up and phase-down processes.
  • Forging boosts its resistance to common issues such as cracks, shrinkage, and porosity.

Unlike forging, Casting uses the liquid form of metal to create valves. These metals are melted into a molten liquid and poured into various molds. Once the liquid cools and solidifies, it’s broken out of or ejected from the mold.

  • It can create valves with complex shapes, patterns, and sizes with more intricate parts.
  • Great cost-effective solution for many companies. It allows you to make valves using more types of metals and alloys.
  • Casting valves provides an easier and less time-consuming way to make replacement parts when a system’s current valves break down and deteriorate.
  • It doesn’t require as much labor as forging valves, casting helps to reduce machining costs, especially when creating valves of complex shapes.
Material Group Forged Grade Equivalent Cast Grade
Carbon Steel A181-Gr.1 A181-Gr.2
Moderate, high temp. service A105-Gr.1 A105-Gr.2 A216-WCA WCB WCC
Cold temp. service A350-LF1 A350-LF2 A352-LCB, LCC
Carbon -1/2 Moly Alloy Steel
High Temp Service A182-F1 A217-WC1
Cold Temp Service A352-LC1
1/2Cr-1/2Mo Alloy Steel A182-F2
1/2Cr-1/2Mo-1 Alloy Steel A217-WC4
3/4Cr-1 Mo-3/4NI Alloy Steel A217-WC5
1Cr-1/2Mo Alloy Steel A182-F12
1Cr-1 Mo-Vd Alloy Steel A404-F24 A389-C24
1-1/4Cr-1/2Mo Alloy Steel A182-F11 A217-WC6
1-1/4Cr-1/2Mo-Vd Alloy Steel A389-C23
2-1/4Cr-1/2Mo-Vd Alloy Steel A182-F22 A217-WC9
3Cr-1 Mo Alloy Steel A182-F21
5Cr-1/2Mo Alloy Steel A182-F5
5Cr-1/2Mo-Si Alloy Steel A217-Gr.C5
7Cr-1/2Mo Alloy Steel A182-F7
9Cr-1 Mo Alloy Steel A182-F9 A217-Gr.C12
13Cr Alloy Steel A182-F6 A351-CA15
Type 304 Stainless Steel
Standard A182-F304 A351-Gr.CF8 CF8a
Low Carbon A182-F304-L A351-Gr.CF3 CF3a
High Temp Service A182-F304-H A351.Gr.CF10
Type 309 Stainless Steel
Type 310 Stainless Steel A182-F310
Type 316 Stainless Steel
Standard A182-F316 A351-Gr.CF8M
Low Carbon A182-F316-L A351-Gr.CF3M
High Temp Service A182-F316-H A351.Gr.CF10
Type 317 Stainless Steel A403-WP317
Type 321 Stainless Steel
Standard A182-F321
High Temp Service A182-F321-H
Type 347 Stainless Steel
Standard A182-F347
High Temp Service A182-F347-H A351-Gr.CF8C
Type 348 Stainless Steel
Standard A182-F348
High Temp Service A182-F348-H
20 Ni-8 Cr Alloy A182-F10
2 Nickel Alloy Steel
Low Temp Service A352-LC2

What are the Strengths and Weaknesses of Forging and Casting?

Forging Casting
Strength Good Mechanical properties (yield strength, ductility, toughness)

Reliability (used for critical parts) No liquid metal treatment

Large and complex parts

High production rate

Design flexibility

Weakness Defects

1.    Laps

2.    Die unfill

3.    Die failure

4.    Piping

Shape limited when undercuts or cored sections are required.

Overall cost usually higher than casting.

Multiple steps often required.


1.    Shrinkage porosity

2.    Metallic projections

3.    Cracks, Hot tearing, Cold shuts

4.    Laps, Oxides

5.    Misruns, Insufficient volume

6.    Inclusions

Requires close process control and inspections (porosity may occur).


How to Determine Whether Forging or Casting to be Done?

  • Steel products may be manufactured either by casting or forging steel. Steel casting is the process by which a metal is heated until it reaches a liquid state and then poured into a mold that shapes the desired product. In Steel forging method, steel is physically forced into shape while remaining in a solid state – although it is frequently heated.
    • Forged parts had a 26% higher tensile strength than the cast parts. This means you can have stronger shackles at a lower part weight. The reason behind is when you melt metal to cast it, the grain size is free to expand. When it cools back to a solid, the grain structure is courser and more random, decreasing its strength.
    • Forged parts have a 37% higher fatigue strength resulting in a factor of six longer fatigue lives. This means that a forged shackle is going to last longer.
    • Cast steel only has 66% of the yield strength of forged steel. Yield strength is an indicator of what load a shackle will hold before starting to deform.
    • The forged parts had a 58% reduction in area when pulled to failure. The cast parts only had a 6% reduction in area. That means there would be much greater deformation before failure in a forged part.

What are the Applications of Stainless Steel Valves?

Valves have many uses, including controlling water for irrigation, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps in the home. Even aerosols have a tiny valve built in. Valves are also used in the military and transport sectors. In HVAC ductwork and other near-atmospheric air flows, valves are instead called dampers. In compressed air systems, however, valves are used with the most common type being ball valves. Valves are found in virtually every industrial process, including water and sewage processing, mining, power generation, processing of oil, gas and petroleum, food manufacturing, chemical and plastic manufacturing and many other fields.

Valves may be operated manually, either by a handle, lever, pedal or wheel. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers. More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.

What are the Pressure Ratings of Stainless Steel Valves?

Pressure-temperature ratings of valves are designated by class numbers. ASME B16.34, Valves-Flanged, Threaded, and Welding End is one of the most widely used valve standards. It defines three types of classes: standard, special, and limited. ASME B16.34 covers Class 150, 300, 400, 600, 900, 1500, 2500, and 4500 valves.

Components of a Stainless Steel Valve

Valve cross-section, Components of Valve

Valve cross-section, Components of Valve

The main parts of the most usual type of valve are the body and the bonnet. These two parts form the casing that holds the fluid going through the valve.

Cross-sectional diagram of an open globe valve.
1. body
2. ports
3. seat
4. stem
5. disc when valve is open
6. handle or handwheel when valve is open
7. bonnet
8. packing
9. gland nut
10. fluid flow when valve is open
11. position of disc if valve were shut
12. position of handle or handwheel if valve were shut

What are the Advantages of Stainless Steel Valves?

  • While plastic valves are also not prone to rust or corrosion, they do not have the strength, durability, or resistance to high pressure that stainless steel valves have.Stainless steel valves are designed with a hydraulic system that prevents all leaks.
  • Robustness
  • Corrosion-Free
  • Resistance Against High-Pressure
  • Variety of Designs
  • Leakage Proof

What are the Disadvantages of Stainless Steel Valve?

Gate Valve:

• Gate valves cannot be opened & closed quickly
• They cause vibrations
• In systems where high-temperature changes irregularly, due to the load in pipe at the valve end, leakages in gate valves occur.
• The operation, maintenance, and repair of gate valves seating surfaces are complex.

Globe Valve:

• Pressure loss is higher
• To close under high pressure, globe valves require a larger amount of force or an actuator with a large torque.

Ball Valve:

• Ball valves are not suitable for permanent throttling.
• In residual fluids, the particles in the fluid collide with the surfaces and stick to them. This may cause leakage, abrasion, and other problems.

Butterfly Valve:

• Butterfly valves have no tight shut offs
• Some portion of the disc is always presented to the flow, even when fully opened. This may result in a pressure switch across the valve, regardless of the setting.

Check Valve:

• They cannot be used with pulsating systems
• Closing element may crash causing damage and excessive wear

Materials Used in Stainless Steel Valves

Material Material Code
Austenitic Stainless Steel CN7M, CN3MN
Precipitation Hardening Stainless Steel 17-4PH, 15-5PH
Duplex Stainless Steel CD4MCu, CD3MN, CE3MN, Alloy2205, Ferralium255, SAF2507, ASTM A890
Monel Monel400
Hastelloy Hastelloy C276, Hastelloy B2, CW2M, CW12MW
Inconel Inconel 600

Selection Criteria for Valves

1. Fabrication:- Will the component be machined, forged, cold formed or welded? The fabrication required should be considered from three perspectives: (a) How easy or difficult will it be to fabricate the component? (b) How will fabrication affect the alloy’s performance? (c) Will the quality of the alloy permit satisfactory fabrication?

2. Physical Properties:- These could include density or magnetic properties.

3. Corrosion Resistance:- Be sure to consider the environment and type of corrosion resistance to be encountered. The most cost effective stainless steel will have enough corrosion resistance to provide the required service life without the needless expense of over-alloying.

4. Mechanical Properties:- Strength is usually the most important mechanical property in the selection of a stainless steel. However, the designer may be concerned also with the alloy’s hardness, ductility, impact resistance, fatigue strength or stress rupture resistance – or, perhaps more than one of these properties. Furthermore, the potential effect of the desired mechanical property on the alloy’s corrosion resistance may be important.

5. Final Component Cost:- Do a thorough value analysis that includes the initial alloy price, the installed cost, and the effective life expectancy of the finished product.

Frequently Used ASTM Grades

Material Pipes Fttg Flg Valves Bolts and Nuts
Carbon Steel A106 Gr A A234 Gr WPA A105 A216 Gr WCB A193 Gr B7
A194 Gr 2H
A106 Gr B A234 Gr WPB A105 A216 Gr WCB
A106 Gr C A234 Gr WPC A105 A216 Gr WCB
Carbon Steel
A335 Gr P1 A234 Gr WP1 A182 Gr F1 A217 Gr WC1 A193 Gr B7
A194 Gr 2H
A335 Gr P11 A234 Gr WP11 A182 Gr F11 A217 Gr WC6
A335 Gr P12 A234 Gr WP12 A182 Gr F12 A217 Gr WC6
A335 Gr P22 A234 Gr WP22 A182 Gr F22 A217 Gr WC9
A335 Gr P5 A234 Gr WP5 A182 Gr F5 A217 Gr C5
A335 Gr P9 A234 Gr WP9 A182 Gr F9 A217 Gr C12
Carbon Steel
A333 Gr 6 A420 Gr WPL6 A350 Gr LF2 A352 Gr LCB A320 Gr L7
A194 Gr 7
A333 Gr 3 A420 Gr WPL3 A350 Gr LF3 A352 Gr LC3
A312 Gr TP304 A403 Gr WP304 A182 Gr F304 A182 Gr F304 A193 Gr B8
A194 Gr 8
A312 Gr TP316 A403 Gr WP316 A182 Gr F316 A182 Gr F316
A312 Gr TP321 A403 Gr WP321 A182 Gr F321 A182 Gr F321
A312 Gr TP347 A403 Gr WP347 A182 Gr F347 A182 Gr F347
Material Pipes Fttg Flg Valves Bolts and Nuts

What are the Various Grades of Stainless Steel, Metallica Deals in?

As one of the biggest stainless steel suppliers in India, we stock and supply all major grades of stainless steel.
Austenitic Stainless Steels
301 High strength for roll formed structural components
304, 304L, 304H Standard 18/8 grades
310, 310S, 310H High temperature resistant grades
316, 316L, 316H Improved resistance to pitting corrosion in chloride environments
321, 321H, 347 Stabilized grades for heavy section welding and high temperature applications
904L High resistance to general corrosion, pitting and stress corrosion cracking
Ferritic Stainless Steels
409 Automotive exhaust grade – weld stabilized
430, 430F Resistant to mildly corrosive environments
439 Resistant to mildly corrosive environments – weld stabilized
444 A ferritic alternative to grade 316 / 316L – weld stabilized
Duplex Stainless Steels
2101 Lean duplex – economical alternative to 304 and 316
2304 Duplex alternative to grade 316
2205 Standard duplex stainless steel – high resistance to pitting and stress corrosion
2507 Super duplex with very high resistance to pitting and stress corrosion
Martensitic Stainless Steels
410 Standard martensitic grade for low-duty hardened applications
416 Free-machining bar grade
420 Higher hardness martensitic grade for cutlery, cutting tools and dies
431 High hardness and toughness grade, primarily for shafting
440A, 440B, 440C Very high hardness grades used in cutting tools
Precipitation Hardening Stainless Steel
630 (17-4PH) High strength shafting grade

What are the Maximum Operating Temperatures of Stainless Steel Grades?

Stainless steels have good strength and good resistance to corrosion and oxidation at elevated temperatures. Stainless steels are used at temperatures up to 1700° F for 304 and 316 and up to 2000 F for the high temperature stainless grade 309(S) and up to 2100° F for 310(S).

Maximum Operating Temperatures of Stainless Steel Grades

[Image Source: From Web]

What is the Impact of Various Alloying Elements on the Properties of Stainless Steel?

Element Effect on Stainless Steel
Chromium Forms a passive film with oxygen that prevent the further diffusion of oxygen into the surface
Composition needs to contain at least 10.5% to be a stainless steel
Nickel Increases ductility and toughness. Increase corrosion resistance to acids
Additon creates non-magnetic structure
Molybdenum Increases pitting and crevice corrosin resistance. Increase resistance to chlorides
Copper Increase corrosion resistance to sulfuric acid
Manganese Substitute for nickel (200 series)
Titanium/Niobium Ties up carbon and prevents inter-granular corrosion in welded zone of ferritic grades
Nitrogen Increase strength and corrosion resistance in austenitic and duplex grades
Silicon Improves resistance to high temperature scaling
Sulfur Usually kept low excet for “free-machining” grades
Carbon Usually kept low.  Used in martensitic grades to increase strength and hardness

Over 1000 Tons in Stock for Stainless Steel Valves!

ISMT & Jindal Steel Pipes Dealers, Original MTR's Provided with All Materials

As one of the biggest stainless steel valves stockholder and supplier in India, Metallica carries inventory of over 1000 tons in its warehouses in Mumbai, Maharashtra India. We sell our stainless steel valves throughout India, and to international clients. We can supply our stainless steel valves not only in industry-standard lengths and diameters, but also in custom length and diameters.

How are Steel Pipes Certified?

Certification of Steel Pipes

Manufacturers issue a Material Test Report or Mill Test Report to validate that the product meets the chemical analysis and mechanical properties specification. The MTR will contain all relevant data to the product and will accompany the product through its lifecycle.

The following are typical parameters that may be recorded on an MTR:

  • Chemical composition including carbon content, alloys, and sulfur
  • Material size, weight, identification, and grade
  • Material heat number, which ties back to the processing batch
  • Mechanical properties like tensile strength, yield strength, and elongation

At Metallica, we will Provide you with Original MTR’s for all Stainless Steel Pipe Products! We will Send Our Test Certificates, along with Quotation