17-4 Stainless Steel
UNS S17400
Description
Type 17-4 is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600 °F (316 °C), good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling.
Chemical Component
| Ni | Cr | Mo | Mn | Cu | Si | C | Nb + Ta | S | P | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 3.0-5.0% | 15.0-17.5% | 0.50% max | 1.0% max | 3.0-5.0% | 1.0% max | 0.07% max | 5*C-0.45% | 0.03% max | 0.04% max | Balance |
Basic Information
| Items | 17-4 Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A039 |
| Density | 0.282 lb/in3 |
| Electrical Resistivity, Ohm-circ mil/ft | 463 |
| Poisson's Ratio | 0.272 |
| Melting Range | 2560-2625 °F |
| Coefficient of Thermal Expansion, in/in°F x 10-6 | 70-212 °F: 7.2; 70-392 °F: 7.5; 70-572 °F: 7.8 |
| Thermal Conductivity, Btu·ft/ft2·hr·°F | At 70 °F: 8.6; At 212 °F: 9.2; At 392 °F: 9.8; At 572 °F: 10.4 |
| Modulus of Elasticity Dynamic, psi x 106 | At 70 °F: 29.0; At 212 °F: 28.1; At 392 °F: 27.0; At 572 °F: 26.1 |
Material Forms
Alfa Chemistry offers 17-4 stainless steel in a variety of forms, including Plate, Round Bar, Wire, Strip.
Mechanical Properties
- Representative tensile properties, longitudinal direction
| Properties | H900* | H925 | H1025 | H1075 | H1100 | H1150 | H1150D | H1150-M |
|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength, ksi | 200 | 190 | 170 | 165 | 150 | 145 | 140 | 125 |
| 0.2% Yield Strength, ksi | 185 | 175 | 165 | 150 | 135 | 125 | 120 | 85 |
| Elongation % in 2" or 4XD | 14 | 14 | 15 | 16 | 17 | 19 | 22 | 22 |
| Reduction of Area, % | 50 | 54 | 56 | 58 | 58 | 60 | 65 | 68 |
| Hardness, Brinell | 420 | 409 | 352 | 341 | 332 | 311 | 294 | 277 |
| Impact Charpy V-Notch, ft - lbs | 15 | 25 | 35 | 40 | 45 | 50 | 55 | 100 |
*For applications requiring greater impact toughness, aging for 4 hours develops typical properties UTS - 196 ksi, 0.2% YS - 181 ksi, Elongation in 2" - 14%, Reduction of Area - 52%
Specifications
AMS: 5604, 5643, 5825
NACE: MR0175
ISO: 15156
Features
- High tensile strength and hardness to 600 °F
- Corrosion resistant
Applications
- Gate valves
- Chemical processing equipment
- Pump shafts, gears, plungers
- Valve stems, balls, bushings, seats
- Fasteners
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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Alfa Chemistry is a manufacturer of standard & custom specialty metals & alloys. We stock a wide variety of alloys in different shapes and specifications. If you can't find the product or specification you need, please contact us directly.
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