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KANAK STEEL& ENGINEERING CO. · MUMBAI
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7 grades

Stainless Steel — Sheets, Plates, Pipes, Fittings & Flanges

Austenitic stainless steels for general corrosion, heat and hygiene service. Choose a grade below for its standards, chemistry, properties and every product form we supply.

  • 904L
  • 304
  • 304L
  • 310S
  • 316L
  • 321
  • 347

Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026

Price & availability

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Quotations within one working day, in INR or USD.

Stainless Steel Grades We Supply

UNS N08904SS 904LDilute sulphuric acid, phosphoric acid and chloride-bearing cooling water.UNS S30400SS 304General corrosion resistance, food, water and architectural work.UNS S30403SS 304LWelded tanks, piping and vessels in general corrosive service.UNS S31008SS 310 / 310SFurnaces, burners and heat treatment at high temperature.UNS S31603SS 316 / 316LChloride-bearing process fluids, marine air and pharmaceutical service.UNS S32100SS 321High-temperature service between 425 and 815 °C.UNS S34700SS 347Welded high-temperature piping in refineries and power plants.

How Stainless Steel Grades Differ

Within a family, nickel, chromium and molybdenum set most of the difference in corrosion resistance and cost. The left chart shows the specified range of each; the right ranks the grades by approximate PREN (pitting resistance), a quick screen for chloride service.

Pitting Resistance (PREN)

SS 304≈ 18SS 304L≈ 18SS 321≈ 18SS 347≈ 18SS 316 / 316L≈ 24SS 310 / 310S≈ 25SS 904L≈ 35
PREN (approx.)Cr + 3.3 Mo + 16 N · screening only

Stainless Steel Grades Compared: Standards & PREN

GradeSheet & platePipeFittingsFlangesPREN
SS 904LASTM A240ASTM A312 (N08904)ASTM A403 WP904LASTM A182 F904L≈ 35
SS 304ASTM A240ASTM A312 TP304ASTM A403 WP304ASTM A182 F304≈ 18
SS 304LASTM A240ASTM A312 TP304LASTM A403 WP304LASTM A182 F304L≈ 18
SS 310 / 310SASTM A240ASTM A312 TP310SASTM A403 WP310SASTM A182 F310≈ 25
SS 316 / 316LASTM A240ASTM A312 TP316LASTM A403 WP316LASTM A182 F316L≈ 24
SS 321ASTM A240ASTM A312 TP321ASTM A403 WP321ASTM A182 F321≈ 18
SS 347ASTM A240ASTM A312 TP347ASTM A403 WP347ASTM A182 F347≈ 18

Products in stainless steel

SheetsFlat product under 3/16" (4.76 mm) thick, cold rolled in most grades, supplied in finishes from 2D and 2B to BA and mirror.PlatesFlat product 3/16" (4.76 mm) and thicker, supplied as full mill plates or cut to your drawing.CoilsHot- and cold-rolled coil, slit to width or supplied as precision strip.Pipes & TubesSeamless and welded pipe to NPS and schedule, plus round, square, rectangular and capillary tube.Pipe FittingsButtweld fittings to ASME B16.9 and forged socket-weld and threaded fittings to ASME B16.11.FlangesPipe flanges from ½" to 24" in Class 150–2500 to ASME B16.5, and larger sizes to ASME B16.47.FastenersStud bolts, bolts, nuts and washers in stainless, duplex and nickel alloys — A193 / A194 / A320, A1082 or F468 where specified.

Stainless Steel for export

FOB / CIF · Nhava Sheva (JNPT), Mumbai
East Asia
South America
North America

Stainless Steel — questions buyers ask

Which stainless steel grades do you supply?

SS 904L, SS 304, SS 304L, SS 310 / 310S, SS 316 / 316L, SS 321, SS 347, in the forms listed on each grade page.

How do I choose between these grades?

Start with the medium, temperature and pressure. The comparison table on this page ranks the grades by pitting resistance and typical use; send us your process conditions for a recommendation.

Do you export?

Yes — to the Gulf, South-East Asia, South America, Europe, the UK and the USA, FOB or CIF from Nhava Sheva, Mumbai.

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