Stainless steel is a metal alloy primarily composed of iron, with at least 10.5% chromium by weight. This chromium addition is what makes it "stainless" - it resists rust and corrosion. Small amounts of other elements, like nickel, molybdenum, and nitrogen, are also often added to further enhance different properties like corrosion resistance or workability.
Table of Content's
Stainless Steel Round Bar
Stainless Steel Flanges
Stainless Steel Fasteners
Stainless Steel Forged Fittings
| Material | AISI 316 L 1.4404 | AISI 304 1.4301 |
|---|---|---|
| Chromium (Cr %) | 16.5 - 18.5 | 17.0 - 19.0 |
| Carbon (C %) | Max. 0.03 | Max. 0.07 |
| Nickel (Ni %) | 11.0 - 14.0 | 8.5 - 10.5 |
| Manganese (Mn %) | Max. 2.0 | Max. 2.0 |
| Silicium (Si %) | Max. 1.0 | Max. 1.0 |
| Sulphur (S %) | Max. 0.030 | Max. 0.030 |
| Structure | Austenitic (nonmagnetic) |
| State | Non-annealed |
| Melting point (°C) | Ca. 1400 |
| Specific gravity (g/cm3) | 7.98 |
| Decortication temperature in air (°C) | 800 - 860 |
| Specific resistance (20° C) (Ohm . mm2/m) | 0.75 |
| Expansion coefficient 20 - 100 °C (m/m . °C) | 16.5 x 10-6 |
| Heat conductivity (20°C) (W/°C-m) | 15 |
| Specific heat (J/g . k) | 0.5 |
| Grade | UNS No | BS | Euronorm No. |
| SS 301 | S30100 | 301S21 | 1.4310 |
| SS 302 | S30200 | 302S25 | 1.4319 |
| SS 303 | S30300 | 303S31 | 1.4305 |
| SS 304 | S30400 | 304S31 | 1.4301 |
| SS 304L | S30403 | 304S11 | 1.4306 |
| SS (302HQ) | S30430 | 394S17 | 1.4567 |
| SS 309S | S30908 | 309S24 | 1.4833 |
| SS 305 | S30500 | 305S19 | 1.4303 |
| SS 314 | S31400 | 314S25 | 1.4841 |
| SS 316 | S31600 | 316S31 | 1.4401 |
| SS 316L | S31603 | 316S11 | 1.4404 |
| SS 316Ti | S31635 | 320S31 | 1.4571 |
| SS 321 | S32100 | 321S31 | 1.4541 |
| SS 347 | S34700 | 347S31 | 1.4550 |
| SS 403 | S40300 | 403S17 | 1.4000 |
| SS 405 | S40500 | 405S17 | 1.4002 |
| SS 409 | S40900 | 409S19 | 1.4512 |
| SS 410 | S41000 | 410S21 | 1.4006 |
| SS 416 | S41600 | 416S21 | 1.4005 |
| SS 420 | S42000 | 420S37 | 1.4021 |
| SS 430 | S43000 | 430S17 | 1.4016 |
| SS 440C | S44004 | - | 1.4125 |
| SS 444 | S44400 | - | 1.4521 |
| SS 630 | S17400 | - | 1.4542 |
| SS (904L) | N08904 | 904S13 | 1.4539 |
| SS (253MA) | S30815 | - | 1.4835 |
| (2205) | S31803 | 318S13 | 1.4462 |
| (3CR12) | S41003 | - | 1.4003 |
| (4565S) | S34565 | - | 1.4565 |
| (Zeron100) | S32760 | - | 1.4501 |
| (UR52N+) | S32520 | - | 1.4507 |