Stainless Steel 17-4
17-4 stainless steel, classified as SAE Type 630, is a versatile stainless steel alloy consisting of 17% chromium and 4% nickel. It finds extensive use in the gas, chemical and aviation industries that operate at elevated temperatures. It exhibits substantial corrosion resistance along with mechanical strength, toughness and strength up to 600°F (316°C). The stainless steel grade also demonstrates superior formability and while exhibiting moderate corrosive resistance allowing its use in operations that require high tensile strength. The 17-4 PH grade is the most used martensitic precipitation-hardenable alloy grade and is noted for its high strength with reasonable ductility and hardness at elevated temperatures and outstanding corrosion resistance in various environments.
Specifications for Stainless Steel 17-4
| Condition | Tensile (KSI) | Yield (KSI) | Elongation (%) | Reduction of Area (%) | Hardness (HRC) |
|---|---|---|---|---|---|
| H900 | 190 | 170 | 10 | 35 | 35 |
| H1025 | 155 | 145 | 12 | 45 | 40 |
| H1075 | 145 | 125 | 13 | 45 | 33-39 |
| H1150 | 135 | 105 | 16 | 50 | 28-37 |
| H1150D | 125 | 105 | 16 | 50 | 25-33 |
| Element | Composition (%) |
|---|---|
| Carbon | 0.07 (Max) |
| Silicon | 1.00 (Max) |
| Manganese | 1.00 (Max) |
| Phosphorous | 0.040 (Max) |
| Sulfur | 0.030 (Max) |
| Chromium | 15-17.5 |
| Molybdenum | 0.50 (Max) |
| Nickel | 3-5 |
| Copper | 3-5 |
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