Stainless Steel 15.5 PH Round Bar
Stainless Steel 15.5 PH is a precipitation-hardening martensitic stainless steel with improved toughness and transverse properties compared to 17-4 PH. It offers high strength, excellent corrosion resistance, and good weldability. Commonly used in aerospace, nuclear, petrochemical, and general industrial sectors.
Key Features
- Improved Toughness: Better than 17-4 PH due to lower delta ferrite.
- Excellent Strength & Hardness: Suitable for high-stress applications.
- Corrosion Resistance: Performs well in mildly corrosive environments.
- Weldability & Fabrication: Easily welded and machined.
- Dimensional Stability: Minimal distortion during aging.
Chemical Composition
Element | Composition (%) |
Chromium (Cr) | 14.0 – 15.5 |
Nickel (Ni) | 3.5 – 5.5 |
Copper (Cu) | 2.5 – 4.5 |
Manganese (Mn) | ≤ 1.00 |
Silicon (Si) | ≤ 1.00 |
Carbon (C) | ≤ 0.07 |
Phosphorus (P) | ≤ 0.04 |
Sulfur (S) | ≤ 0.03 |
Mechanical Properties
Property | Value |
Tensile Strength | ≥ 1170 MPa |
Yield Strength (0.2% offset) | ≥ 1070 MPa |
Elongation | ≥ 10% |
Hardness | ~33–42 HRC |
Applications
- Aerospace: Gears, shafts, structural fittings.
- Nuclear & Petrochemical: Valve stems, pumps, and pressure vessel parts.
- Defense: Firearm components and mechanical linkages.
- Food & Medical: Tools and parts exposed to moisture or acidic environments.
- Industrial Machinery: Precision machine parts, jigs, and fixtures.
Forms Available
- Round Bars: Precision-engineered for high-performance applications.
- Flat Bars: For structural and industrial uses.
- Square Bars: Ideal for precision engineering.
- Hex Bars: Suitable for fasteners and custom designs.
- Custom Sizes: Manufactured to meet specific project requirements.
Equivalent Grades
Standard | Grade |
UNS | S15500 |
ASTM | A564 |
W.Nr | 1.4545 |
Surface Finish and Coatings
- Finishes: Delivered in turned, peeled, or polished finishes.
- Optional Coatings: PTFE, passivation, or phosphate coating on request.
Quality Assurance & Packaging
- Certifications: ASTM A564 / AMS 5659 compliant.
- Testing: UT, tensile, hardness, and third-party inspections.
- Packaging: Packed with end caps and labeled in wooden crates or bundles.
Trust Riyaarth Overseas for top-grade 15-5 PH stainless steel round bars—precision-made, quality-certified, and globally delivered.
FAQ's
Products
Industry We Serve
- Oil & Gas industries
- Chemical process industries
- Pump and valve in high pressure component
- Food industries
- Pulp and paper industry
- Aerospace industry
- Power plant
- Mechanical component
- Sugar industry
- Cement industry