A precipitation hardenable chromium-nickel-copper stainless, Alloy 15-5 offers an outstanding combination of high strength and excellent corrosion resistance.
15-5 Stainless Steel is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance and good mechanical properties at temperatures up to 316°C.
| % | Ni | Cr | Mn | Cu | Si | Nb+Ta | C | P | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | 3.5 | 14 | - | 2.5 | - | 0.15 | - | - | - | - |
| Max | 5.5 | 15.5 | 1 | 4.5 | 1 | 0.45 | 0.07 | 0.04 | 0.03 | Balance |
Alloy 15-5 was designed to have high strength with superior toughness than 17-4 PH. Alloy 15-5 is martensitic in structure in the annealed condition (ferrite free) and is further strengthened by a relatively low temperature heat treatment which precipitates a copper containing phase in the alloy. Alloy 15-5 is also referred to as XM-12 in some specifications.
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| Mechanical & Physical Properties | 21.1°C | 93°C | 427°C |
|---|---|---|---|
| Coefficient of Thermal Expansion, µm/m⁰C | - | - | 11.4 |
| Thermal Conductivity/ kcal/(hr.m.°C) | - | 15.8 | - |
| Modulus of Elasticity/ x105 MPa | 1.97 | - | - |
| Minimum Specified Properties, ASTM A564 | |
|---|---|
| Condition | Anneal |
| Ultimate Tensile Strength/MPa | - |
| 0.2% Yield Strength/Mpa | - |
| Reduction of area /% | - |
| Elongation/% | - |
| Hardness, Brinell | 363(MAX) |
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