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Introduction
aisi 304(18Cr8Ni ) stainless steel is one of Austenitic stainless steel. As a versatile steel,
it has good corrosion resistance, heat resistance, low temperature strength and
mechanical properties. Meanwhile, it is quite good in pressing, bending and other
thermal processing.No heat harding and non magnetic
chemical properties
| Typical chemical composition | ||||
| % | 304 | 304L | 310s | 321 |
| C | 0-0.07 | 0-0.03 | 0.8 | 0.08 |
| Mn | 0-2.0 | 0-2.0 | 2.00 | 2.00 |
| Si | 0-1 | 0-1 | 1.00 | 1.00 |
| P | 0-0.05 | 0-0.05 | 0.035 | 0.035 |
| S | 0-0.02 | 0-0.02 | 0.030 | 0.03 |
| Cr | 17.5-19.5 | 17.5-19.5 | 24.0-26.0 | 17.0-19.0 |
| Ni | 8-10.5 | 8-10.5 | 19.0-22.0 | 9.0-12.0 |
| Mo | ||||
| TI | 5×C% | |||
| Fe | Balance | Balance | ||
Pysical properties
Tensile strength σb (MPa) ≥ 520
Conditions yield strength σ0.2 (MPa) ≥ 205
Elongation δ5 (%) ≥ 40
Section shrinkage ψ (%) ≥ 60
Hardness: ≤ 187HB; ≤ 90HRB; ≤ 200HV
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