| Trade Desig. |
UNS No. |
Typical Composition ( % ) | Form | Treatment | Tensile Strength MPa | Yield Strength (0.2% offset) MPa | Elonga tion % | Hardness | Description and Applications | |||||
| C | Mn | Cr | Mo | Ni | Others | Min. | Min. | Min. | Max. | |||||
| Ferritic Stainless Steels | ||||||||||||||
| 3CR12 | S41003 | 0.03 | 1 | 11.5 | Plate | Annealed | 460 | 300 | 20 | 160 HRB | "Utility" stainless steel with useful resistance to wet abrasion, and good formability and weldability. | |||
| 409 | S40900 | 0.06 | 1 | 11 | Ti 0.4 | Plate | Annealed | 380 | 205 | 20 | 80 HRB | Resists atmospheric and automotive exhaust gas corrosion. Used extensively in auto exhaust systems. | ||
| 430 | S43000 | 0.03 | 0.4 | 16.5 | Plate | Annealed | 450 | 205 | 22 | 88 HRB | Good combination of corrosion resistance and formability. Used for interior panelling and cold headed fasteners. | |||
| 430F | S43020 | 0.07 | 1 | 16.5 | S 0.25 | Bar | Annealed | 590-860 | - | - | - | Free machining version of 430 | ||
| 444 | S44400 | 0.02 | 0.8 | 18 | 2 | Ti 0.4 |
|
Weldable chromium-molybdenum ferritic grade has excellent corrosion resitance to hot water containing minor amounts of chlorides. | ||||||
| Duplex Stainless Steels | ||||||||||||||
| 2205 | S31803 | 0.02 | 0.8 | 22 | 3 | 5 | N 0.15 | Plate | Annealed | 620 | 450 | 25 | 32 HRC | High strength and good resistance to pitting corrosion and stress corrosion cracking. |
| Zeron100 | S32760 | 0.02 | 0.8 | 25 | 3.5 | 7 | N 0.25 Cu 0.7 W 0.7 |
Plate | Annealed | 800 | 600 | 30 | 25 | Super duplex grade exhibiting exceptional resistance to hot chlorides and strong acids, and with high strength. |
| Martensitic Stainless Steels | ||||||||||||||
| 410 | S41000 | 0.1 | 0.5 | 12 | Plate | Annealed | 450 | 205 | 20 | 95 HRB | Resists dry atmospheres, fresh water and other mild environments. Hardened and tempered to achieve best strength and corrosion resistance. | |||
| 416 | S41600 | 0.12 | 1.0 | 12 | Free machining hardenable grade. Corrosion resistance not as good as for 410. | |||||||||
| 420 | S42000 | 0.3 | 0.5 | 13 | Bar | Annealed | - | - | - | - | Higher carbon content than 410 gives higher hardness for cutlery, knife blades, dies and surgical instruments. | |||
| 431 | S43100 | 0.2 | 0.6 | 15 | 2 | Bar | Annealed | - | - | - | 285 HRB | High strength, excellent toughness and corrosion resistance similar to that of 304. Used for pump shafts, bolts and value components. | ||
| Precipitation Hardening Stainless Steels | ||||||||||||||
| 630 | S17400 | 0.05 | 0.6 | 16 | 4 | Cu 4 Nb 0.25 |
Bar | Solution Treated | 1150 | 1050 | 15 | 38 HRC | Precipitation hardening ("aging") treatment after machining gives high strength without distortion. Corrosion resistance similar to 304. | |
