Technical Data Sheet
17-4 PH Stainless Steel is a martensitic, precipitation-hardening stainless steel that provides an outstanding combination of high strength and hardness along with excellent corrosion resistance. 17-4 PH has good fabricating characteristics and can be age hardened by a single step, low temperature treatment. 17-4 PH is a versatile material typically used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.
Corrosion Resistance
17-4 PH Stainless Steel withstands corrosive attack better than any of the standard hardenable stainless steels and is comparable to Type 304 in most media.
Formability
In Condition A, 17-4 PH is hard, therefore forming normally should be limited to mild operations. However, formability can be greatly improved by heat treating before cold working or by use of hot-forming methods.
| Chemical Composition Limits | ||||||||
| Weight% | C | Si | Mn | P + S max | Cr | Ni | Cb + Ta | Cu |
| AMS 5604 17-4PH | 0.07 max | 1.0 max | 1.0 max | 0.04 P 0.03 S |
15.0 – 17.5 | 3.0 – 5.0 | 5 XC / 0.45 | 3.0 – 5.0 |
Typical Mechanical Properties
Material Alloy 17-4 PH Bar (AMS 5643)
| Condition |
Ultimate Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation % in 2D | % Reduction of Area | Rockwell C Hardness |
| Cond A | – | – | – | – | 39 max |
| H900 | 190 | 170 | 10 | 40 | 40-47 |
| H925 | 170 | 155 | 10 | 44 | 38-45 |
| H1025 | 155 | 145 | 12 | 45 | 34-42 |
| H1075 | 145 | 125 | 13 | 44 | 31-38 |
| H1100 | 140 | 115 | 14 | 45 | 30-37 |
| H1150 | 135 | 105 | 16 | 50 | 28-37 |
Material Alloy 17-4 PH Sheet/Bar (AMS 5604)
| Condition |
Ultimate Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation % in 2D (Values are for sheet <0.1874″ thick) | % Reduction of Area | Rockwell C Hardness |
| Cond A | – | – | – | – | 38 max |
| H900 | 190 | 170 | 5 | – | 40-47 |
| H925 | 170 | 155 | 5 | – | 38-45 |
| H1025 | 155 | 145 | 5 | – | 35-42 |
| H1075 | 145 | 125 | 5 | – | 33-39 |
| H1100 | 140 | 115 | 5 | – | 32-38 |
| H1150 | 135 | 105 | 8 | – | 28-37 |
