13-8 PH Stainless Steel
UNS S13800
Description
13-8 PH stainless steel is a martensitic precipitation-hardening stainless steel which is desired for its corrosion resistance, superior toughness, remarkable strength, and high hardness. Like 17-4 PH alloy, it requires only a one-step heat treatment conducted at a temperature in the range 950 °F (510 °C) to 1150 °F (620 °C), depending on the combination of strength and toughness desired. A wide range of properties can be produced by this one-step heat treatment. Heat treatment at about 950 °F (510 °C) produces the highest strength. Typical applications are large airframe structural components and injection molding equipment.
Chemical Component
| Ni | Cr | Mo | Si | C | Mn | N | Al | S | P | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 7.5-8.5% | 12.25-13.25% | 2.0-2.5% | 0.1% max | 0.05% max | 0.2% max | 0.1% max | 0.90-1.35% | 0.008% max | 0.01% max | Balance |
Basic Information
| Items | 13-8 PH Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A036 |
| Density | 0.279 lb/in3 |
| Melting Range | 2560-2680 °F |
| Electrical Resistivity | 613 Ohm-circ mil/ft |
| 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 13-8 PH stainless steel in the form of Round Bar.
Mechanical Properties
- Strength varies with heat treatment condition. The following table shows minimum mechanical properties for the variousaged conditions, per AMS 5864.
| Properties | H950 | H1000 | H1025 | H1050 | H1100 | H1150 |
|---|---|---|---|---|---|---|
| 0.2 Offset Yield Strength, ksi | 205 | 190 | 175 | 165 | 135 | 90 |
| Ultimate Tensile Strength, ksi | 220 | 205 | 185 | 175 | 150 | 135 |
| Elongation in 2", % | 10 | 10 | 11 | 12 | 14 | 14 |
| Reduction of Area, % (Longitudinal) | 45 | 50 | 50 | 50 | 50 | 50 |
| Reduction of Area, % (Transverse) | 45 | 50 | 50 | 50 | 50 | 50 |
| Reduction of Area, % (Short-Transverse) | 35 | 40 | 45 | 45 | 50 | 50 |
| Min Hardness, Rockwell | 45 | 43 | - | 40 | 34 | 30 |
Specifications
Features
- Martensitic, precipitation hardening (maraging) stainless steel.
Applications
- Aerospace components
- Injection molding equipment
- Components in the petrochemical and nuclear industries
* 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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