Stainless Steel Grade 304 is the most commonly used stainless steel. 304 Stainless Steel belongs to the family of Austenitic Stainless Steel in which pure iron has existence only at a steady temperature range of 910º – 1400º Celsius. It doesn’t display magnetism, but it is austenitic, corrosion resistant steel with excellent strength, tough, fabrication characteristics and weldability. SS 304L is the low carbon version of SS 304 may be required for full corrosion resistance when thicker sections are welded. The SS 304H version has a guaranteed minimum carbon content, which ensures good strength at high temperatures. SS 304LN is a nitrogen-strengthen version of SS 304.
| Stainless Steel [SS] 304 / H / L / N / LN | |
|---|---|
| AISI | 304 / 304H / 304L / 304N / 304LN |
| UNS | S30400 / S30409 / S30403 / S30451 / S30453 |
| Werkstoff Nr. | 1.4301 / 1.4306 / 1.4948 / 1.4311 |
| SS | 304 | 304H | 304N | 304L | 304LN |
|---|---|---|---|---|---|
| Ni | 8 – 11 | 8 – 11 | 8 – 11 | 8 – 13 | 8 – 11 |
| Fe | Balance | ||||
| Cr | 18 – 20 | 18 – 20 | 18 – 20 | 18 – 20 | 18 – 20 |
| Cr | 0.08 max | 0.04 – 0.10 | 0.08 max | 0.035 max | 0.035 max |
| Si | 0.75 max | 0.75 max | 0.75 max | 0.75 max | 0.75 max |
| Mn | 2 max | 2 max | 2 max | 2 max | 2 max |
| P | 0.040 max | 0.040 max | 0.040 max | 0.040 max | 0.040 max |
| S | 0.030 max | 0.030 max | 0.030 max | 0.030 max | 0.030 max |
| N | 0.10 – 0.16 | 0.10 – 0.16 | |||
| Density | 8.0 g/cm3 |
|---|---|
| Melting Point | 1400 °C (2550 °F) |
| Tensile Strength | Psi – 75000. MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000. MPa – 205 |
| Elongation | 35 % |
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