SS 316 Seamless & Welded Pipe Suppliers in Madurai
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Stainless steels are defined as ferrous alloys with the addition of at least 10.5% chromium by weight and are essentially low carbon steels containing significant amounts of chromium. It is the addition of chromium that gives this type of steel its corrosion resisting properties.
The chromium content of the steel allows the formation of an invisible corrosion resistant chromium oxide film on the steel surface. If damaged mechanically or chemically this film is self-healing providing that oxygen, even in very small amounts, is present. The corrosion resistance of stainless steel can be enhanced along with providing other useful properties by increasing the chromium content and by adding other elements such as molybdenum, nickel, and nitrogen.
Madurai was traditionally an agrarian society. With the advent of Small Scale Industries (SSI) after 1991, the industrialisation of Madurai increased employment in the sector across the district in 2001–02. Madurai is one of the few rubber growing areas in South India, and there are rubber-based industries in Madurai. Gloves, sporting goods, mats, other utility products and automobile rubber components are the most produced items by these industries. Automobile manufacturers are the major consumers of rubber components produced in the city. There are numerous textile, granite and chemical industries operating in Madurai.
Manufacturing Range for 316 Stainless Steel Seamless & Welded Pipes
|Product||TP316, 1.4401, UNS S31600 Stainless Steel Pipes|
|Specification||ASTM A213, ASTM A249, ASTM A269, ASTM A270, ASTM A312, ASTM A358 CL. I to V, ASTM A403, ASTM A554, ASTM A632, ASTM A789, ASTM A790 TP316|
|Type and Form||Seamless & ERW/EFW/LSAW Welded,Fabricated, Round, Square, Rectangular, Hydraulic, Large Diameter 100% X-Ray Welded|
|Size Range||Size: 6″NB to 100″NB – EFW|
|Size:1/2”NB to 24” NB – ERW|
|1/8” NB to 30” NB – Tubing Size|
|1/2” NB to 24” NB – Pipes and Tubes Size|
|Thickness||SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160|
|Wall Thickness: 5S – XXS (Heavier On Request)|
|End||Plain End, Beveled End, Threaded|
|Length||6 Meter, Custom Lengths, Single Random, Double Random|
|Other Grades||TP304, TP304L, TP304LN, TP316, TP316Ti, TP316H, TP316L, TP316LN, TP317, TP317/317L, TP321, TP347, TP310S|
|Test Certificates||Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2|
|ASTM Reference Standards|
- A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels.
- A370 Test Methods and Definitions for Mechanical Testing of Steel Products.
- A480 A480M Specification for general requirements for Flat-rolled stainless and Heat-Resisting steel plate, sheet, and strip.
- A632 Specification for Seamless and welded austenitic stainless-steel tubing (small-diameter) for general service.
- A1016 A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes.
- E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
|Testing||Mechanical Testing Such as Tensile of Area, Hardness Test, Chemical Analysis – Spectro Analysis, Positive Material Identification – PMI Testing, Flattening Test, Micro and MacroTest, Pitting Resistance Test, Flaring Test, Intergranular Corrosion (IGC) Test|
|Documents||Commercial Invoice, Packing List, Certificate of Origin, Fumigation Certificates, Raw Material Test Reports, Material Traceability Records, Quality Assurance Plan (QAP), Heat Treatment Charts, Test Certificates certifying NACE MR0103, NACE MR0175, Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Guarantee Letter, NABL approved Laboratory Test Reports|
Chemical Composition of AISI 316 Seamless or Welded Stainless Steel Pipes
|NI||11.0 – 14.0||10.0 – 14.0||10.0 – 14.0|
|C||0.08 max||0.035 max||0.08 max|
|MN||2.0 max||2.0 max||2.0 max|
|P||0.045 max||0.045 max||0.045 max|
|S||0.30 max||0.30 max||0.30 max|
|SI||1.0 max||1.0 max||0.75 max|
|CR||16.0 – 18.0||16.0 – 18.0||16.0 – 18.0|
|MO||2.0 – 3.0||2.0 – 3.0||2.0 – 3.0|
|TI||5x(C+N) – 0.70|
Comparison of Chemical Composition of Various Stainless Steel Grades
|Grade||UNS||Composition, % in Max.|
|TP304||S30400||0.08||2||0.045||0.03||1||18.0–20||8.0–11||. . .||. . .|
|TP304L||S30403||0.035||2||0.045||0.03||1||18.0–20||8.0–13||. . .||. . .|
|TP304LN||S30453||0.035||2||0.045||0.03||1||18.0–20||8.0–11||. . .||0.10-0.16|
|TP316||S31600||0.08||2||0.045||0.03||1||16.0–18||10.0–14||2.00–3||. . .|
|TP316L||S31603||0.035||2||0.045||0.03||1||16.0–18||10.0–15||2.00–3||. . .|
|TP316LN||S31653||0.035||2||0.045||0.03||1||16.0–18||10.0–13||. . .||0.10-0.16|
|TP317L||S31700||0.035||2||0.045||0.03||1||18.0–20||11.0–15||3.0–4||. . .|
|TP321||S32100||0.08||2||0.045||0.03||1||17.0–19||9.0–12||. . .||. . .|
|TP347||S34700||0.08||2||0.045||0.03||1||17.0–19||9.0–13||. . .||. . .|
Properties of SS 316, SS 316L and 316Ti Seamless or Welded Stainless Steel Pipes
|DENSITY||7.99 g/cm 3 / 0.29 lb/in 3|
|MELTING POINT||1371 – 1399 (°C) / 2500 – 2550 (°F)|
|ANNEALED||1040 (°C) / 1900 (°F)|
Mechanical Properties Comparision of 316 Stainless Steel Pipes
|Grade||UNS Designation||Tensile Strength, Min. Ksi [MPa]||Yield Strength, Min. Ksi [MPa]|
|TP304||S30400||75 ||30 |
|TP304L||S30403||70 ||25 |
|TP316||S31600||75 ||30 |
|TP316L||S31603||70 ||25 |
|TP317L||S31703||70 ||25 |
|TP321||S32100||75 ||30 |
|TP347||S34700||75 ||30 |
|TP347H||S34709||75 ||30 |
Grade Specification & Equivalents Comparison
|Grade||UNS No||Old British||Euronorm||Swedish SS||Japanese JIS|