15-5PH stainless steel rods are widely used in aerospace, automotive, and industrial applications because of their excellent combination of strength, corrosion resistance, and hardness. Procurement professionals often ask: "What is the hardness of 15-5PH rods, and how does it affect performance?" This guide provides detailed technical data, product forms, and practical advice for buyers.
What is 15-5ph stainless steel rods?
15-5PH stainless steel bar (UNS S15500) is a martensitic precipitation-hardening chromium-nickel-copper alloy designed for high strength, excellent transverse toughness, and superior corrosion resistance, often outperforming 17-4PH stainless steel. Widely used in aerospace and marine applications, this material features high corrosion resistance and minimal distortion during heat treatment, making it ideal for manufacturing components that require high tensile strength and can withstand temperatures up to 600°F.
What is the typical hardness of 15-5PH rods after aging?
After proper precipitation hardening, 15-5PH rods can reach 42–48 HRC, providing excellent strength for high-load applications.
| Condition | Hardness (HRC) | Tensile Strength (MPa) | Yield Strength (MPa) |
|---|---|---|---|
| Solution Treated (H900) | 28 – 32 HRC | 930 – 1,050 | 760 – 860 |
| Precipitation Hardened (H1025) | 42 – 45 HRC | 1,200 – 1,300 | 1,000 – 1,100 |
| Peak Aged | 45 – 48 HRC | 1,300 – 1,400 | 1,100 – 1,200 |
The H900 and H1025 designations refer to typical aging temperatures (°F), controlling hardness and strength. Proper aging ensures optimal performance for springs and precision components.
15-5PH SS rods Chemical Composition
| Element | 15-5PH (%) |
|---|---|
| Carbon (C) | 0.07 max |
| Chromium (Cr) | 14.0 – 15.5 |
| Nickel (Ni) | 3.5 – 5.5 |
| Copper (Cu) | 3.0 – 5.0 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Iron (Fe) | Balance |
mechanical properties of 15-5 PH stainless steel
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 1380 MPa | 200000 psi |
| Yield Strength | 1275 MPa | 184900 psi |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Elongation at Break | 10% | 10% |
| Hardness, Brinell | 420 | 420 |
| Hardness, Knoop | 451 | 451 |
| Hardness, Rockwell B | 104 | 104 |
| Hardness, Rockewell C | 44.2 | 44.2 |
| Hardness, Vickers | 445 | 445 |
| Charpy Impact | 10 J | 7.38 ft.lb |
What is the modulus of elasticity of 15-5PH?
The elastic modulus (Young's modulus) of 15-5PH stainless steel is typically 28.5 × 10⁶ psi (196 GPa) at room temperature.
What are the standards for 15-5PH stainless steel bars?
15-5PH stainless steel bars (UNS S15500/XM-12) are primarily governed by aerospace and material standards, most notably AMS 5659 (bars, wire, forgings, and rings). Other key standards include ASTM A564 (bars and shapes), ASTM A484, and various heat-treat specific conditions (e.g., H900, H1150) that define high strength, toughness, and corrosion resistance.
15-5 PH stainless steel Applications
The following are some of the major applications of Grade 15-5 PH stainless steel:
Marine gas turbine compressor sections
Hallow shafts
Paper mill equipment
Engine parts
Aircraft components
Gears
Fittings and fasteners
Nuclear reactor components
Why Choose Our 15-5PH Stainless Steel Rods?
✔ Wide size range and customizable forms
✔ Solution treated or precipitation hardened to specified hardness
✔ Compliance with ASTM A564 / AMS 5659 / AMS 5737 standards
✔ Full inspection and testing reports
✔ Fast global delivery and technical support
Partnering with a reliable supplier ensures consistent hardness, corrosion resistance, and high-performance for critical applications.
Available Rod Forms and Sizes
| Product Form | Diameter Range | Length / Supply | Surface Finish | Heat Treatment / Condition |
|---|---|---|---|---|
| Round Rod | 3 mm – 120 mm | Cut-to-length or coils | Bright / Polished | Solution Treated / Precipitation Hardened |
| Flat Bar | Custom | Cut-to-length | Polished / Matte | Solution Treated |
| Wire / Rod | 0.5 mm – 10 mm | Coiled or straight | Bright / Polished | Precipitation Hardened |
| Forgings | Custom | Custom | Machined / Polished | Age Hardened |
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