Stainless Steel Grades
Chemistry, strength, equivalents and uses of every grade we supply.
Need the full chemistry side by side? See the chemical composition chart for all grades, including carbon, manganese, phosphorus, sulphur and nitrogen limits.
| Grade | Family | UNS | EN | JIS | Cr % | Ni % | Mo % | Tensile / Yield (MPa) |
|---|---|---|---|---|---|---|---|---|
| SS 304 | Austenitic (300 series) | S30400 | 1.4301 | SUS 304 | 17.5 – 19.5 | 8.0 – 10.5 | — | 515 / 205 |
| SS 304L | Austenitic (300 series) | S30403 | 1.4307 | SUS 304L | 17.5 – 19.5 | 8.0 – 12.0 | — | 485 / 170 |
| SS 316 | Austenitic (300 series) | S31600 | 1.4401 | SUS 316 | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 – 3.00 | 515 / 205 |
| SS 316L | Austenitic (300 series) | S31603 | 1.4404 | SUS 316L | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 – 3.00 | 485 / 170 |
| SS 202 | Austenitic (200 series) | S20200 | 1.4373 | SUS 202 | 17.0 – 19.0 | 4.0 – 6.0 | — | 620 / 260 |
| SS 201 | Austenitic (200 series) | S20100 | 1.4372 | SUS 201 | 16.0 – 18.0 | 3.5 – 5.5 | — | 515 / 260 |
| SS 310S | Austenitic heat-resistant | S31008 | 1.4845 | SUS 310S | 24.0 – 26.0 | 19.0 – 22.0 | — | 515 / 205 |
| SS 321 | Austenitic (titanium stabilised) | S32100 | 1.4541 | SUS 321 | 17.0 – 19.0 | 9.0 – 12.0 | — | 515 / 205 |
| SS 410 | Martensitic (400 series) | S41000 | 1.4006 | SUS 410 | 11.5 – 13.5 | 0.75 max | — | 450 / 205 |
| SS 430 | Ferritic (400 series) | S43000 | 1.4016 | SUS 430 | 16.0 – 18.0 | 0.75 max | — | 450 / 205 |
| SS 904L | Super-austenitic | N08904 | 1.4539 | SUS 890L | 19.0 – 23.0 | 23.0 – 28.0 | 4.0 – 5.0 | 490 / 220 |
| Duplex 2205 | Duplex (austenitic-ferritic) | S32205 / S31803 | 1.4462 | SUS 329J3L | 22.0 – 23.0 | 4.5 – 6.5 | 3.0 – 3.5 | 655 / 450 |
| SS 316Ti | Austenitic (titanium stabilised) | S31635 | 1.4571 | SUS 316Ti | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 – 3.00 | 515 / 205 |
| SS 317L | Austenitic (high molybdenum) | S31703 | 1.4438 | SUS 317L | 18.0 – 20.0 | 11.0 – 15.0 | 3.0 – 4.0 | 515 / 205 |
The most popular stainless steel — "18/8". Excellent corrosion resistance, easy to weld and form, non-magnetic in the annealed condition.
Full details SS 304LAustenitic (300 series)Low-carbon version of 304. Resists intergranular corrosion after welding, so it is preferred for welded tanks and thick sections.
Full details SS 316Austenitic (300 series)Molybdenum-bearing "marine grade" stainless with much better resistance to chlorides, acids and pitting than 304.
Full details SS 316LAustenitic (300 series)Low-carbon 316 — the standard grade for pharma, biotech and welded chemical equipment.
Full details SS 202Austenitic (200 series)A lower-nickel, manganese-bearing grade that costs less than 304. Good for indoor and decorative use.
Full details SS 201Austenitic (200 series)Economical low-nickel grade used for utensils, appliances and indoor items where cost matters most.
Full details SS 310SAustenitic heat-resistantHigh-chromium, high-nickel heat-resistant grade for service up to about 1100 °C.
Full details SS 321Austenitic (titanium stabilised)Titanium-stabilised 304 that resists intergranular corrosion at 425 – 815 °C. Used for exhausts and high-temperature service.
Full details SS 410Martensitic (400 series)Hardenable 12% chromium stainless with good strength and wear resistance. Magnetic.
Full details SS 430Ferritic (400 series)Nickel-free ferritic stainless with good indoor corrosion resistance and a bright finish. Magnetic and economical.
Full details SS 904LSuper-austeniticHigh-alloy super-austenitic grade with copper and molybdenum for sulphuric acid and severe chloride environments.
Full details Duplex 2205Duplex (austenitic-ferritic)Duplex stainless with about twice the yield strength of 316L and excellent resistance to chloride stress-corrosion cracking.
Full details SS 316TiAustenitic (titanium stabilised)Titanium-stabilised 316: the corrosion resistance of 316 with protection against intergranular corrosion after welding and at 400–800 °C.
Full details SS 317LAustenitic (high molybdenum)A higher-molybdenum, low-carbon grade with better pitting and acid resistance than 316L — a step between 316L and 904L.
Full detailsStainless steel grades — FAQs
Which stainless steel grade is the most common?
SS 304 is the most widely used stainless steel grade. It contains about 18% chromium and 8% nickel, is non-magnetic, easy to weld and suits kitchens, dairy, tanks and general fabrication.
What is the difference between SS 304 and SS 316?
SS 316 contains 2–3% molybdenum and more nickel than SS 304, which gives it much better resistance to chlorides, sea water and many chemicals. It typically costs 40–70% more per kg.
Which stainless steel grades are magnetic?
Ferritic SS 430 and martensitic SS 410 are magnetic, and duplex 2205 is partly magnetic. Austenitic grades such as 304, 316, 321 and 310S are non-magnetic in the annealed condition.
Which stainless steel grade is the cheapest?
The 200-series grades (201, 202) and the nickel-free 430 are the cheapest. They suit indoor and decorative work, but have lower corrosion resistance than 304.
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