what is Stainless Steel 17-4 PH Round Bars Round Bars? This alloy contains roughly 15–17.5% chromium, 3–5% nickel, and 3–5% copper, with small additions of niobium (or columbium) to enable precipitation strengthening. The chemistry and microstructure allow it to be precipitation hardened to high strength levels while maintaining good corrosion resistance, even up to temperatures of around 600°F (316 °C). Standard specifications include ASTM A564 / ASME SA564 for bars. In its typical designation, this material is also recognized as UNS S17400, EN 1.4542, JIS SUS 630, and DIN 1.4542.

Stainless Steel 17-4 PH Round Bars Round Bars belong to the martensitic precipitation-hardening family, combining the durability of stainless steel with superior strength through age-hardening. Also known as UNS S17400 or Alloy 630, this grade can be supplied in various tempers and hardness levels, making it highly versatile for structural and critical components.

One major advantage of this alloy is its high strength-to-weight ratio. When properly aged (for example in the H1075 or H1150 condition), it can reach tensile strengths of over 125 ksi (860 MPa) and high yield strength, as per ASTM A564 UNS S17400 specifications. Its hardness can reach Rockwell C levels in the 40s depending on temper, offering excellent wear and fatigue resistance.

Thanks to its chromium content, it has good corrosion resistance comparable to type 304 stainless under many environments. Because it is precipitation hardened, designers can tailor its mechanical properties through heat treatment to balance strength, toughness, and ductility. It also retains good toughness, weldability, and machinability in certain tempers.

What Are the Uses and Applications of Stainless Steel 17-4 PH Round Bars Round Bars? Here are common applications where Stainless Steel 17-4 PH Round Bars Round Bars excel:

• Aerospace components such as shafts, structural supports, and turbine parts, where high-strength round bars are required.

• Petrochemical and chemical processing equipment like manifolds and housing, needing corrosion-resistant stainless bars.

• Oil-gas industry components such as pump fluid ends and valve parts, leveraging the age-hardened precipitation-hardening stainless steel.

• Surgical instruments and medical tooling, benefiting from biocompatible and high-strength stainless steel round bars.

• Fasteners, bolts, and studs, because of the ability to machine and heat-treat to very high strength.

• Paper, pulp, and dairy processing machinery, where stainless alloy bars must resist wear and corrosion.

• Nuclear waste casks and high-integrity structural components, where long-term strength and corrosion resistance are critical.

• Sporting and defence equipment requiring light but strong precipitation-hardened stainless bars.

At SMM Industries LLP, as leading Stainless Steel 17-4 PH Round Bars Round Bars Manufacturers, we produce our round bars according to stringent quality standards. Our manufacturing process ensures compliance with ASTM A564 / ASME SA564 and UNS S17400 grade.

As trusted Stainless Steel 17-4 PH Round Bars Round Bars Suppliers, SMM Industries LLP maintains a wide inventory in various diameters, lengths, and finishing options, offering rapid delivery to customers worldwide.

SMM Industries LLP is also a reliable Stainless Steel 17-4 PH Round Bars Round Bars Stockists, keeping in stock common sizes and tempers so clients can access precipitation-hardening stainless bars without long lead times. Operating globally, SMM Industries LLP serves as a Stainless Steel 17-4 PH Round Bars Round Bars Exporters to markets in Europe, Asia, Middle East, and America, supplying both standard and custom specifications.

Stainless Steel 17-4 PH Round Bars Round Bars is known under various designations across international standards: UNS S17400 (United States), ASTM A564 / ASME SA564, Grade 630, H1075 or H1150 tempers, EN / DIN: 1.4542 (also known as X5CrNiCuNb16-4), JIS: SUS 630, AFNOR / French: Z6CNU17-04 These equivalents help engineers and procurement teams identify the same alloy under different naming conventions globally.

SMM Industries LLP delivers top-grade Stainless Steel 17-4 PH Round Bars Round Bars engineered to deliver high tensile strength, excellent corrosion resistance and reliable performance in challenging environments. With compliance to ASTM A564 / ASME SA564 and as part of the UNS S17400 family, our bars meet rigorous metallurgical and mechanical benchmarks. Whether for aerospace, petrochemical, medical or structural uses, we provide exactly the right grade, finish, and size you need—all backed by expert support and global delivery capabilities.