• Metallica is one of the biggest stainless steel 304/304L product supplier and manufacturer in India, with over 250 customers in India and overseas. We are bulk buyers and exporters of stainless steel 304/304L pipes, fittings and flanges from our factory in India, and are able to give you the best price and quality just in time.
  • We stock all major forms of stainless steel 304/304L grade such as SS 304 pipe and tube, SS 304 forged flange and fittings, SS 304 butt-welding pipe fittings, SS 304 elbow, SS 304 tee, SS 304 reducer, SS 304 stub end, gaskets, fasteners, valves, sanitary fittings etc. Being one of the largest volume stainless steel 304 supplier in Mumbai, we can guarantee you the lowest prices.
  • At Metallica Metals, we believe in selling in volume and increasing our customer base across the globe, enabling us to work on low margins. We have an extensive trader network across India and the Middle East, who buy from us on a regular basis.
  • In addition to traders, we have many EPC contractors, companies and end users in various industries as our customers for stainless steel. We are leading stainless steel 304 suppliers for various applications ranging from low/medium/high pressure or temperatures.
  • On-Time Delivery with Quality Assurance and Price Guarantee for Stainless Steel 304/304L.
Stainless Steel 304 / 304L Supplier, Manufacturer, Wholesaler in India and Overseas
  • Largest Stainless Steel 304/304L Products Supplier in India, with over 300 Tons in Stock

  • We Sell Stainless Steel 304/304L Products in Price Range of Rs. 200/KG to Rs. 600/KG.

  • Our Annual Sales Volume for Stainless Steel 304/304L Products is Over 1500 tons.

  • Stainless Steel 304/304L Pipes, are Sold with Complete Range of Related Pipe Fittings.

Stainless Steel 304/304L Product Suppliers in India!

Product Stainless Steel 304/304L
Equivalents AISI 310, AISI 310S, UNS S30400, UNS S30403, WNR.1.4301/1.4307,
Items Pipe, Tubes, Tubing, Fittings, Flanges, Valves, Fasteners, Sheet, Square Bar, Threaded Bar, Plate, Hexagon Bar, Fasteners and Fixings, Round Bar, Flat Bar, Rebar, Angle, Tube & Pipe, Wire
Size 1/4″ – 16″
Pipe Type Seamless, Welded, ERW, Fabricated, Custom Size Pipes
Specifications ASTM, ASME, DIN, GOST, JIS
Certification EN 10204 3.1
Fittings Type Butt Weld, Screwed & Socket Weld, Flanges, Instrumentation
Other Fittings Elbows, Tees, Reducers, Caps, Stub Ends, Flanges (ANSI, Table E, D and H), Nuts, Bolts, Screws, Threaded Bars

Full Range of Stainless Steel 304/304L Products

Stainless Steel 304/304L Pipes Stainless Steel 304/304L Seamless Pipes
Stainless Steel 304/304L Welded Pipes Stainless Steel 304/304L Square Pipes
Stainless Steel 304/304L Flanges Stainless Steel 304/304L Buttweld Fittings
Stainless Steel 304/304L Forged Fittings SS 304/304L Socket Weld Pipe Fittings
Stainless Steel 304/304L Threaded Fittings Stainless Steel 304/304L Fasteners
Stainless Steel 304/304L Nuts & Bolts Stainless Steel 304/304L U Bends & Tubes
Stainless Steel 304/304L Valves Stainless Steel 304/304L Tubes
Stainless Steel 304/304L Furnace Tubes Stainless Steel 304/304L Seamless Tubing
SS 304/304L Heat Exchanger Tubes Stainless Steel 304/304L Large Dia. Pipes
Stainless Steel 304/304L Boiler Tubes SS 304/304L High Pressure Pipes
Stainless Steel 304/304L Forgings SS 304/304L High Temperature Pipes

What is 304 and 304L Stainless Steel?

Description of 304 / 304L Stainless Steel

Grade 304 stainless steel is a T 300 Series Stainless Steel austenitic. It has a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. The remainder of its composition is made up of carbon, manganese, silicon and very small amounts of phosphorous and sulfur. It is defined as a Chromium-Nickel austenitic alloy. Grade 304 is the standard “18/8” stainless that you will probably see in your pans and cookery tools. Additionally, the metal is pliable under both hot and cold working, though it responds better to cold working; it will only work harden under cold working. Extended exposure to temperatures between 800–1500°F can lead to embrittlement and should be carefully monitored.

Grade 304L is the low carbon version of 304, and although the two types share many of the same properties, it is the differences in carbon content that differentiates them. It does not require post-weld annealing to effectively maximize corrosion resistance and so is extensively used in heavy gauge components (over about 6mm). Grade 304H with its higher carbon content finds application at elevated temperatures. Additionally, it also possesses a higher work hardening rate. 304L exhibits excellent resistance in a variety of atmospheres and temperatures, along with the corrosion and oxidation that occurs over time. However, like many stainless steels, it is susceptible to warm chlorine environments and can potential pit and crack.

Stainless Steels 304 and 304L can be commonly found dually certified. This utilized the widely applicable properties of both metals and meets the individual specifications for each.Grade 304/304L is the most widely used commercial grade of stainless steel supplied into numerous industry sectors. It has excellent corrosion resistance in ordinary atmospheric conditions, it is easily machined and is also easy to weld. Whilst performing well when exposed to relatively high temperatures, this grade of stainless steel like most austenitic stainless grades, also maintains its strength and toughness at sub-zero temperatures, making this an excellent choice for various applications and industries such as food & drink processing, petrochemical and construction.

What is the Difference Between Stainless Steel 304 and 304L?

According to the content of chromium and nickel ,they are all 304 stainless steel, the composition is containing 18% chromium (Cr), 8% nickel (Ni), but the main difference is the percentage of carbon between them.

The two main variants of grade 304 are the low carbon form 304L and the high carbon form 304H. 304L has a maximum of 0.30% carbon. This reduces the tendency for carbide precipitation when welding. Carbide precipitation can result in intergranular corrosion.

SS 304 is pliable under both hot and cold working, though it responds better to cold working; it will only work harden under cold working. Extended exposure to temperatures between 800–1500°F can lead to embrittlement and should be carefully monitored.

SS 304L is the low-carbon derivative of Type 304, and although the two types share many of the same properties, it is the differences in carbon content that differentiates them. SS 304L is used for applications where a low carbon count is required, such as in heavy gauge components. Its different composition from Type 304 also eliminates the need for post-weld annealing to effectively maximize corrosion resistance. Additionally, it also possesses a higher work hardening rate. 304L exhibits excellent resistance in a variety of atmospheres and temperatures, along with the corrosion and oxidation that occurs over time. It is often applied in areas of higher temperatures than Type 304 can endure, and its low carbon allow it to be resistant against carbon precipitation. However, like many stainless steels, it is susceptible to warm chlorine environments and can potential pit and crack.

Stainless Steels 304 and 304L can be commonly found dually certified. This utilized the widely applicable properties of both metals and meets the individual specifications for each.

Applications of 304 / 304L

SS 304 is a stainless steel with applications ranging from the manufacturing of chemical equipment, kitchen and cooking utensils and equipment, to surgical tools and textile dyeing equipment.

SS 304L is used for applications where a low carbon count is required, such as in heavy gauge components. It is often applied in areas of higher temperatures than Type 304 can endure, and its low carbon allow it to be resistant against carbon precipitation.

It is used for a wide variety of home and commercial applications, this is one of the most familiar and most frequently used alloys in the stainless steel family. Typical applications include tanks and containers for a large variety of liquids and solids:

  • Food industry
  • Domestic tools industry
  • Architectural panelling, railings & trim
  • Chemical containers, including for transport
  • Heat Exchangers
  • Woven or welded screens for mining, quarrying & water filtration
  • Dyeing industry
  • In the marine environment, because of it slightly higher strength and wear resistance than type 316 it is also used for nuts, bolts, screws, and other fasteners.

Standard Tolerances of 304 / 304L / 304LN / 304H

Sizes Standard Tolerances
Products OD Wall Lengths and/or coils Grades OD Wall Lengths
Welded AusteniticSteel Boiler, Super Heater, Heat-Exchanger Tube & Condenser Tubes 0.5″ (6 mm) to 12 ” (323.85 mm) 0.020″ (0.51 mm) to 1.312 ” (33.325 mm) Random sor cut lengths to Customer Requirements 304/304L/304LN/304H Under 1″ (25.4 mm) ±0.004″ (0.10 mm) 1″ (25.4 mm) to ±10% Randoms up to +2″ (50.8 mm) Cuts +1/8″ (3 mm) -0″ Coils to 80,000′ (24,384 m)
1-1/2″ (38.1 mm) ±0.006″ (0.15 mm)
Specifications: ASTM-A249, ASME-SA249, ASTM-A688, ASME-SA688 Metric sizes available >1-1/2″ (38.1 mm) to 2″ (50.8 mm) ±0.008″ (0.20 mm)
>2″ (50.8 mm) to 2-1/2″ (63.5 mm) ±0.010″ (0.25 mm)
>2-1/2″ (63.5 mm) to 3″ (76.2 mm) ±0.012″ (0.30 mm)
3″ (76.2 mm) to 4″ (101.6 mm) ±0.015″ (0.38 mm)
Pressure & Corrosion Stainless Steel Tube 1/16″ (1.59 mm) to 4″ (101.6 mm) 0.010″ (0.25 mm) to 0.220″ (5.59 mm) Random or cut lengths up to 90′ (27.4 m) Coils to 1-1/2″ OD 304/304L/304H <1-1/2″ (38.1 mm) ±0.005″ (0.13 mm) 1-1/2″ (38.1 mm) to 3″ (76.2 mm) ±0.010″ (0.25 mm) ±10% Randoms up to +2″ (50.8 mm) Cuts +1/8″ (3 mm) -0″ Coils to 80,000′ (24,384 m)
3-1/2″ (88.9 mm) to 4″ (101.6 mm) ±0.015″ (0.38 mm)
Meets or exceeds requirements for welded Metric sizes available
Specifications: ASTM-A269, ASTM-A1016, and ASTM-A632
Beverage Stainless Steel Tubing 1/4″(6.35 mm) 5/16″ (7.94 mm) 3/8″ (9.53 mm) 1/2″ (12.7 mm) 0.020″ (0.51 mm) to 0.028″ (0.71 mm) Random or cut lengths up to 40′ (12.2 m) 304/304L/304H ±0.005″ (0.13 mm) ±10% Randoms up to +2″ (50.8 mm) Cuts +1/8″ (3 mm) -0″ Coils to 15,000′ (4,572 m)
Metric sizes available
Instrumentation Tubing 1/16″ (1.59 mm) to 1/2″ (12.7 mm) 0.010″ (0.25 mm) to 0.065″ (1.65 mm) Random or cut lengths up to 40′ (12.2 m) 304/304L/304H ±0.005″ (0.13 mm) ±10% Randoms up to +2″ (50.8 mm) Cuts +1/8″ (3 mm) -0″
Specifications: ASTM-A269 and ASTM-A632
Metric sizes available
Food/Dairy Tubing, Pharmaceutical/ BioPharmaceutical Tubing, High Purity Tubing, Ultra High Purity Tubing 1/2″ (12.7 mm) to 8″ (203.2 mm) 0.049″ (1.24 mm) to 0.109″ (2.77 mm) 20′ (6.1 m) stock lengths. Other lengths available upon request. 304/304L 1/2″ (12.7 mm) ±0.005″ (0.13 mm) ±10% +1/8″ (3 mm) -0″
3/4″ (19.1 mm) ±0.005″ (0.13 mm)
1″ (25.4 mm) ±0.005″ (0.13 mm) ±10% +1/8″ (3 mm) -0″
1-1/2″ (38.1 mm) ±0.008″ (0.20 mm)
2″ (50.8 mm) ±0.008″ (0.20 mm) ±10% +1/8″ (3 mm) -0″
2-1/2″ (63.5 mm) ±0.010″ (0.25 mm)
3″ (76.2 mm) ±0.010″ (0.25 mm) ±10% +1/8″ (3 mm) -0″
4″ (101.6 mm) ±0.015″ (0.38 mm)
6″ (152.4 mm) ±0.030″ (0.76 mm) ±10% +1/8″ (3 mm) -0″
8″ (203.2 mm) +0.061″ (1.55 mm), -0.031″ (0.79 mm)
±10% +1/8″ (3 mm) -0″
±10% +1/8″ (3 mm) -0″
±10% +1/8″ (3 mm) -0″
±10% +1″ (25.4 mm) -0″
±10% +1″ (25.4 mm) -0″

Properties and Processing Characteristics of Stainless Steel 304 / 304L

Type 304 stainless steel is the most common austenitic chromium nickel stainless steel and is a variation of the classic 18/8 stainless. Its properties provide corrosion resistance to a wide range of atmospheric, chemical, textile, petroleum, and food industry exposures. Type 304L is an extra low carbon.

The metal is characterized by its corrosion resistance, especially in cases of oxidation and salt water. Otherwise referred to as Grade 304 or Type 304, it is the most commonly utilized grade of stainless steel, being extremely versatile in application, form, and finishes. This makeup ensures that SS 304 has a well-balanced level of performance in terms of weldability, corrosion resistance and anti-oxidation properties.

Alloy 304/304L has excellent strength and toughness at cryogenic temperatures. Alloy  304/304L is non-magnetic in the annealed condition, but can become slightly magnetic as a result of cold working or welding. It can be easily welded and processed by standard shop fabrication practices.

Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C. Continuous use of 304 in the 425- 860°C range is not recommended if subsequent aqueous corrosion resistance is important. Grade 304L is resistant to carbide precipitation and can be heated into this
temperature range.

Heat treatment – Solution Treatment (Annealing) to 1010-1120°C and cool rapidly. These grades cannot be hardened by thermal treatment.

Types of 304 / 304L Stainless Steel

* Pipelines * Heat Exchangers * Pressure Vessels
* Flanges and fittings * Valves * Processing Equipment
* General Construction * Threaded Bar * Fasteners and Fixings
* Tube * Special Sections * Sheet and Plate
* U Channel * Flat Bar * Round Bar
* Hollow Bar * Angles * i Beam

Chemical, Mechanical and Physical Properties of 304/304L

Specification

STANDARD SS 304 SS 304L SS 304H
UNS S30400 S30403 S30409
WERKSTOFF NR. 1.4301 1.4306 1.4948

ASTM Specifications

Alloy UNS Designation Werkstoff NR. Specifications*
304 S30400 EN 10216 – 5 1.4301 A269, A/SA249, A/SA312, A632, A/SA688, A270
304L S30403 EN 10216 – 5 1.4307 A269, A/SA249, A/SA312, A629, A632, A/SA688, A270
304LN S30453 EN 10216 – 5 1.4311 A/SA249, A/SA688
304H S30409 EN 10216 -5 1.4948 A269, A/SA249, A/SA312, A/ SA 688

Grade Specification Comparision

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304 S30400  304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
304L S30403 304S11  – 1.4306  X2CrNi19-11 2352 SUS 304L
304H S30409 304S51 1.4948 X6CrNi18-11
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Chemical Composition

Element Type 304 (%) Type 304L (%)
Carbon 0.08 max. 0.03 max.
Manganese 2.00 max. 2.00 max.
Phosphorus 0.045 max. 0.045 max.
Sulfur 0.03 max. 0.03 max.
Silicon 0.75 max. 0.75 max.
Chromium 18.00-20.00 18.00-20.00
Nickel 8.00-10.50 8.00-12.00
Nitrogen 0.10 max. 0.10 max.
Iron Balance Balance

304 Stainless Physical Properties

  • Density: 8.03g/cm3
  • Electrical resistivity: 72 microhm-cm (20C)
  • Specific Heat: 500 J/kg °K  (0-100°C)
  • Thermal conductivity: 16.3 W/m-k (100°C)
  • Modulus of Elasticity (MPa): 193 x 103 in tension
  • Melting Range: 2550-2650°F (1399-1454°C)

Mechanical Properties

Hardness, Brinell 123 123 Converted from Rockwell B hardness.
Hardness, Knoop 138 138 Converted from Rockwell B hardness.
Hardness, Rockwell B 70 70
Hardness, Vickers 129 129 Converted from Rockwell B hardness.
Tensile Strength, Ultimate 505 MPa 73200 psi
Tensile Strength, Yield 215 MPa 31200 psi at 0.2% offset
Elongation at Break 70% 70% in 50 mm
Modulus of Elasticity 193 – 200 GPa 28000 – 29000 ksi
Poisson’s Ratio 0.29 0.29
Charpy Impact 325 J 240 ft-lb
Shear Modulus 86 GPa 12500 ksi

Fabrication Data

Alloy 304/304L can be easily welded and processed by standard shop fabrication practices.

Hot Forming:-  Working temperatures of 1652–2102°F (750–1150°C) are recommended for most hot working processes. For maximum corrosion resistance, the material should be annealed at 1900°F (1038°C) minimum and water quenched or rapidly cooled by other means after hot working.
Cold Forming:- The alloy is quite ductile and forms easily. Cold working operations will increase the strength and hardness of the alloy and might leave it slightly magnetic.
Welding:- Alloy 304/304L can be readily welded by most standard processes. A post weld heat treatment is not necessary.
Machining:- Alloy 304/304L is subject to work hardening during deformation and is subject to chip breaking. The best machining results are achieved with slower speeds, heavier feeds, excellent lubrication, sharp tooling and powerful rigid equipment.

Corrosion Resistance

Alloy 304/304L has good resistance to atmospheric corrosion, foods and beverages and to many organic and inorganic chemicals in moderately
oxidizing to moderately reducing environments. The high chromium content of the alloy provides resistance to oxidizing solutions such as nitric acid up to 55% weight and up to 176°F (80°C). Alloy 304/304L also resists moderately aggressive organic acids such as acetic. The nickel present in the alloy provides resistance to moderately reducing solutions such as pure phosphoric acid, whatever the concentration, in cold solutions and up to 10% diluted hot solutions. The alloy can also operate successfully in caustic solutions free of chlorides or fluorides at moderate temperatures.

Alloy 304/304L does not perform well in more highly reducing environments such as those containing chlorides and sulfuric acid. Alloy 304/304L performs well in fresh water service with low levels of chlorides (less than 100ppm). At higher chloride levels the grade is susceptible to crevice corrosion and pitting. For successful performance under these more severe conditions, higher molybdenum content is need such as 316/316L. Alloy 304/304L is not recommended for service in marine environments.

In most instances, the corrosion resistance of Alloys 304, 304L and 304H
will be roughly equal in most corrosive environments. However, in environments that are sufficiently corrosive to cause intergranular corrosion
of welds and heat-affected zones Alloy 304L should be used because of its low carbon content

Over 200 Tons in Stock for 304/304L Stainless Steel Products!

As one of the biggest 304 /304L stainless steel stockholder and supplier in India, Metallica carries inventory of over 200 tons in its warehouses in Mumbai, Maharashtra India. We sell our 304 / 304L steel products throughout India, and to international clients.

1.4301, 1.4307, 304/304L, Grade 304, Grade 304L, Alloy 304, Alloy 304L, AISI 304L, TYPE 304, UNS S30400, UNS S30403, UNS S30409, X2CrNi18-9, ASTM A240, ASME SA240, 304 Stainless, 304, 304L, 304H

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 304 / 304L Stainless Steel Pipe and its Related Products! We will Send Our Test Certificates, along with Quotation