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17-4
Stainless Steel 17-4 Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
Overview
17-4 stainless has high tensile strength and hardness and excellent corrosion resistance up to high temperatures. It is typically used in gate valves, chemical processing equipment, pump shafts, gears, ball bearings, bushings, and fasteners.
Common Trade Names
UNS S17400, SAE type 630 stainless, AK Steel 17-4 PH®*, PH17-4, 17-4PH, 17Cr-4Ni, Precipitation Hardening
*AK Steel 17-4 PH® is a registered trademark of AK Steel Holding Corporation.
Other Resources
Safety Data Sheet | Weight Calculator | Mill Test Reports
Products
Purchase Round Bar 17-4 | Square Bar 17-4 | Sheet/Plate 17-4
Applications
- Gate Valves
- Chemical Processing Equipment
- Pump Shafts
- Gears
- Ball Bearings
- Bushings
- Fasteners
Stainless 17-4 Specifications
ASTM | AMS | ASME |
|---|---|---|
| A564 | 5604 | SA564 |
| A693 | 5622 | SA693 |
| A705 | 5643 | SA705 |
| 5825 |
| Physical Properties 17-4 | |||||
| Annealed | -H900 | ||||
|---|---|---|---|---|---|
| Density | 0.280 lb/in3 | 0.282 lb/in3 | |||
| Ultimate Tensile Strength | 160 ksi | 210 ksi | |||
| Yield Tensile Strength | 145 ksi | 200 ksi | |||
| Fatigue Strength | N/A | 98 ksi | |||
| Shear Strength | N/A | 120 ksi | |||
| Shear Modulus | N/A | 11,000 ksi | |||
| Hardness Rockwell | Brinell | C36 | 363 | C40-47 | 388-444 | |||
| Elongation at Break Percentage | 6-15% | 12% | |||
| Reduction of Area | 30-60% | 35-40% | |||
| Modulus of Elasticity | N/A | 28,000 ksi | |||
| Poisson's Ratio | 0.28 | 0.28 | |||
| Machinability Percentage | 45% | N/A | |||
| Melting Point | 2,550-2,620 °F | 2,550-2,620 °F | |||
| Specific Heat | 1.1 x 10^-1 BTU/lb-°F | 1.1 x 10^-1 BTU/lb-°F | |||
| Thermal Conductivity | 116 BTU-in/hr-ft^2-°F | 116 BTU-in/hr-ft^2-°F | |||
| Electrical Conductivity | 2.3% IACS | 2.3% IACS | |||
|
Chemistry Information
|
|
Element |
Percentage |
| C | 0.07 max |
| Cu | 3 - 5 |
| Cr | 15 - 17.5 |
| Fe | 73 |
| Mn | 1 max |
| Nb + Ta | 0.15 - 0.45 |
| Nb | 0.45 max |
| Ni | 3 - 5 |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1 max |
| Ta | 0.45 max |
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