Except for the presence of trace amounts of copper, aluminium, phosphorus, or titanium, PH alloys are similar to other stainless steel and nickel-based alloys. After forming a part from a PH alloy, it is subjected to an age-hardening process, during which these elements precipitate as hard intermetallic compounds, significantly increasing the hardness and strength of the part.
| Composition | wt% |
|---|---|
| Carbon(C) | 0.07max |
| Manganese(Mn) | 1.00max |
| Phosphorus(P) | 0.040max |
| Sulfur(S) | 0.030max. |
| Silicon(Si) |
AK Steel17-4PH Stainless Steel provides excellent mechanical properties.For applications requiring high strength and hardness plus corrosion resistance,this alloy is an outstanding choice.In addition,it is more cost effective than many high-nickel,non-ferrous alloys.
| UTS,ksi.(MPa) | 160(1103) | 200(1379) | 190(1310) | 170(1172)( | 165(1138) | 150(1034) | 137(945) |
|---|---|---|---|---|---|---|---|
| 0.2%YS,ksi.(MPa) | 115(793) | 185(1275) | 175(1207 | 165(1138) | 160(1103) | 130(896) | 111(765) |
| Elongation %in 2"(50.8mm) | 5 | 9 | 9 | 10 | 11 | 12 | 17) |
| RockwellHardnessC | 35 | 45 | 43 | 38 | 37 | 33 | 31 |
| UTS,ksi.(MPa) | 185max.(1276) | 190min.(1310) | 170min.(1172) | 155min.(1069)( | 145min.(1000) | 140min.(965) | 135min.(931) |
|---|---|---|---|---|---|---|---|
| 0.2%YS,ksi.(MPa) | 160max.(1103) | 170min.1172) | 155min.(1069) | 145min.(1000) | 125min.(862) | 115min.(790) | 105min.(724) |
| Elongation %in 2"(50.8mm) | 3min. | 5min. | 5min. | 5min. | 5min. | 5min. | 8min. |
| RockwellHardnessC | 38max. | 40–48 | 38–46 | 35–43 | 31–40 | 31–40 | 28–38 |
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