沉澱硬化鋼
沉澱硬化不鏽鋼的化學成分一般不超過18-8鉻鎳奧氏體不鏽鋼鉻、鎳含量，碳含量較低。 加入少量產生沉澱硬化的所謂硬化元素，如鋁、鈦、鈮、銅和銅、銅和銅等。 鉬等。 最後形成後，經過時間處理，析出中間化合物（如Ni3AL、NI3TI等）和一些少量的碳化物，產生沉澱硬化。 具有比普通Matinotena不銹鋼更高的強度，更好的焊接性、韌性、冷加工成型性和耐腐蝕性。
沉澱硬化不鏽鋼常用於核電、航太等產業，其主要特點是具有超高強度的一類不銹鋼。 一般依其組織可分為三類：沉澱硬化馬氏體不鏽鋼、沉澱硬化半奧氏體不鏽鋼、沉澱硬化奧氏體不鏽鋼。
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| GB1220-2007 | (GB1220-92) | ISC | ASTM | UNS | SAE | (DIN) | EN10088:1/EN10095 | (JIS) |
| 05Cr15Ni5Cu4Nb | 15-5PH | S15500 | XM-12 | 1.4545 | XM-12 | |||
| 05Cr17Ni4Cu4Nb | 0Cr17Ni4Cu4Nb | S51740 | 17-4PH | S17400 | 630 | 1.4542 | X5CrNiCuNb16-4 | |
| 07Cr17Ni7Al | 0Cr17Ni7Al | S51770 | 17-7PH | S17700 | 631 | 1.4568 | X7CrNi17-7 | |
| 07Cr15Ni7Mo2Al | 0Cr15Ni7Mo2Al | S51570 | PH15-7Mo | S15700 | 632 | 1.4532 | X8CrNiMoAl15-7-2 |
| Grades | Description |
|---|---|
| 17-4PH Annealed | Penn Stainless inventory now includes Alloy 17-4 (Alloy 630, UNS S17400) in sheet, plate, round bar, and true bar. Custom 17-4PH tubular products available upon request. |
| 17-4PH H1150 | Penn Stainless inventory now includes Alloy 17-4 (H1150, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. |
| 17-4PH H1025 | Penn Stainless inventory now includes Alloy 17-4 (H1025, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. |
| 17-4PH H900 | Available upon request: Alloy 17-4 (H900, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. |
| 17-7 Alloy | Penn Stainless inventory now includes 17-7PH Alloy (UNS S17700) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. |
