UNS S17700 Round Bar Manufacturer – High Strength & Precision Bars
Leading Supplier of UNS S17700 (17-7PH) Stainless Steel Round Bars
We are a trusted manufacturer and exporter of UNS S17700 stainless steel round bars. AISI 631,also known as 17-7 PH stainless steel. A stable, chromium-nickel-aluminum steel, 17-7 is a precipitation hardening steel with a high strength and moderately resistant to corrosion.This precipitation-hardening alloy offers a unique combination of high strength, hardness, and excellent corrosion resistance, making it ideal for critical applications in aerospace, chemical processing, and mechanical engineering.
We supply precision-machined, heat-treated round bars in a variety of diameters and lengths, ready for immediate dispatch or custom production.
S17700 Round bar Specificaiton
- Material: Stainless Steel UNS S17700 / 17-7PH
- Standards: ASTM A564 / A693, AMS 5644, EN 1.4568
- Condition: Annealed (Condition A), Cold-Worked, CH900, H900, H1025, H1150, etc.
- Sizes: Diameter from 6mm to 200mm (or custom)
- Length: Up to 6 meters or cut-to-size
- Surface Finish: Black, bright
- Manufacturing Methods: Hot rolled, cold drawn, precision ground
What is ASTM A564 ?
It is Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
This specification covers bars and shapes of age-hardening stainless steels. Hot-finished or cold-finished rounds, squares, hexagons, bar shapes, angles, tees, and channels are included
Chemical compostion of UNS S17700 According to ASTM A564
| UNS Designation⁸ | Type | C | Mn | P | S | Si | Cr | Ni | Al |
| S17700 | 631 | 0.09 | 1 | 0.04 | 0.03 | 1 | 16.00 – 18.00 | 6.50 – 7.75 | 0.75 – 1.50 |
Solution treatement of UNS S17700
| UNS Designation | Type | Condition | Solution Treatment | Mechanical Test Requirements in Solution Treated Condition⁴ | Hardness^C | ||||||
| Tensile Strength, min | Yield Strength, min⁸ | Elongation in 2 in. [50 mm] or 4D, min % | Reduction of Area, min % | Rockwell C, max | Brinell, max | ||||||
| ksi | [MPa] | ksi | [MPa] | ||||||||
| S17700 | 631 | A | 1900 ± 25 °F [1040 ± 15 °C] (water quench) | … | … | … | … | … | … | HRB98 | 229 |
Mechanical Test requirement after Age hardening Heat treatment
Applications of S17700 Round Bar
- Aerospace structural components
- Springs and washers
- Nuclear and marine components
- Chemical processing equipment
- Precision-machined mechanical parts
S17700 Round Bar also can be used to produce the S17700 stud bolt,17-7PH fasteners.
