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The Stainless Steel 13-8 PH Circle is a robust, precipitation-hardening stainless steel product crafted for outstanding mechanical performance, corrosion resistance, and durability in tough environments. With a composition that includes chromium (12–14%), nickel (7–8%), and a touch of aluminum and copper, this steel excels at resisting oxidation, stress corrosion, and general atmospheric wear, all while boasting impressive tensile strength and toughness. These circles are meticulously manufactured to ensure uniform thickness, a smooth surface finish, and precise dimensions, making them perfect for aerospace, defense, chemical, and high-performance engineering applications. The 13-8 PH Circles blend strength, hardness, and corrosion resistance, making them essential for critical structural and mechanical components.
Primarily made of iron, chromium (12–14%), nickel (7–8%), and trace amounts of aluminum, copper, and niobium/tantalum for precipitation hardening, the mechanical properties of Stainless Steel 13-8 PH depend on the heat treatment it undergoes. Typically, it features a tensile strength ranging from 1,100 to 1,350 MPa, yield strength between 860 and 1,100 MPa, and good elongation. The precipitation-hardening process enhances its hardness, fatigue resistance, and corrosion resistance, making these circles ideal for applications that demand high strength, toughness, and reliability in stressful and corrosive conditions.
| Specifications | ASTM A240, ASME SA240 |
| Dimensions | ASTM, ASME and API |
| Standard | JIS, AISI, ASTM, GB, DIN, EN, etc. |
| Thickness | 1 Mm To 100 mm. |
| Diameter | Upto 2000 Mm. |
| Circle Diameter | 3″ DIA up to 38″ DIA 1500 lbs max. |
| Circles Form | Hot Rolled Circles, Cold Rolled Circle, Proof Machined Circles. |
| Cr 12.25 – 13.23% | Ni 7.50 – 8.50% | Mo 2.00 – 2.50% | Al 0.90 – 1.35% | N 0.010% | |||||
| Mn 0.10% | Si 0.10% | C 0.05% | P 0.010% | S 0.008% |
| Tensile (UTS)N/mm² | 0.2% YieldN/mm² | Elongation(50.8mm) %) | HardnessHRc | Reductionof Area |
| 1965 | 1896 | 2 | 57 | 10 |
| Alloy | UNS Number | SAE Number |
| 13-8 PH | UNS S13800 |
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) |
| 0.282 | 1.72 | 97 | 0.11 | 0.00000589 | 2560 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Stainless steel 13-8 PH Circle provides exceptional strength, corrosion resistance and toughness, making it ideal for aerospace, marine, and high-stress applications Its precipitation hardening properties ensure superior mechanical performance and dimensional stability. The alloy’s excellent resistance to stress corrosion cracking and oxidation makes it durable in harsh environments. Its mechanical and weldability allows versatile design, while the uniformity of the material ensures reliable performance in critical applications. With excellent strength coupled with fatigue resistance, stainless steel 13-8 pH spheres are a cost-effective robust option for complex industrial and architectural applications.
Industries that require high strength, corrosion resistance, and precise dimensions widely utilize Stainless Steel 13-8 PH Circles. In aerospace and defense, they serve as structural components, fasteners, gears, and shafts that need top-notch mechanical performance. The chemical and petrochemical sectors use them for critical components that come into contact with corrosive substances. In industrial settings, they find applications in high-strength shafts, mechanical parts, and precision-engineered components. The combination of high mechanical strength, corrosion resistance, and toughness ensures that Stainless Steel 13-8 PH Circles deliver reliable performance in demanding situations.
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