Thank You for Your Attention on Beiye!
17-4PH is a martensitic precipitation hardening stainless steel, also named 0Cr17Ni4Cu4Nb. The intensity level of the alloy can be adjusted by changes in heat treatment process. Martensitic transformation and the formation of precipitation hardening phase by aging treatment is the main means to strengthen the alloy. good 17-4PH alloy has good anti-attenuation, anti-fatigue, anti-corrosion and nice resistance to water droplets properties.
Domestic and foreign designation:
Beiye | China Standard | America | Germany | Japan |
74 | 0Cr17Ni4Cu4Nb | AISI630 | SUS630 |
C | ≤0.07% | Cu | 3～5% |
Si | ≤1.00% | Cr | 15.5～17.5% |
Mn | ≤1.00% | Ni | 3～5% |
| P | ≤0.035% | Nb | 0.15～0.45% |
S | ≤0.030% | Fe | Bal |
Aging at 480℃ | Aging at 550℃ | Aging at 580℃ | Aging at 620℃ | |
Tensile strength, σb (MPa) | ≥1310 | ≥1060 | ≥1000 | ≥930 |
Yield strength, σ0.2 (MPa) | ≥1180 | ≥1000 | ≥865 | ≥725 |
Elongation, δ5 (%) | ≥10 | ≥12 | ≥13 | ≥16 |
Reduction of area, ψ (%) | ≥40 | ≥45 | ≥45 | ≥50 |
Hardness | ≥375HB(≥40HRC) | ≥331HB(≥35HRC) | ≥302HB(≥31HRC) | ≥277HB(≥28HRC) |
Solution heat treatment at 1020～1060℃, rapid cooling; then aging treatment, air cooling.
Density, g/cm3 | 7.78 |
Elastic Modulus, E, 103MPa (103ksi) | 213 (30.885) |
Thermal conduction λ, W∕ (m·K) | 15.9 |
