17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar
As a leading China 17-7PH (SUS 631 / UNS S17700 / 1.4568) stainless steel round bar supplier, SEATHER manufactures and produces different length and diameter of 17-7PH stainless steel round bar rod.
It features better corrosion resistance than general martensitic stainless steel and higher strength than common austenite.
Grade 17-7PH features high strength, high hardness, good corrosion resistance, anti-fatigue, and workability. It is less likely to deform under high temperature.
We offer custom sizes, precision processing, and global shipping. Get a quote from SEATHER TECHNOLOGY today!
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Specifications Srtandard
| Alloy Grade | 17-7PH, AISI 631, UNS S17700, W.Nr.1.4568, SUS631, 07Cr17Ni7Al |
| Standard | ASTM A564 |
| Surface Finish | Bright, Pickling, Black, Polished |
| Shape | Round Bar |
| Outer Diameter | 6mm – 600mm |
| Raw Material | POSCO, Baowu, TISCO, SEATHER, Outokumpu |
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Equivalent Grade
| STANDARD | 17-7PH |
| WERKSTOFF NR. | 1.4568 |
| UNS | S17700 |
| JIS | SUS 631 |
| GB/T | 07Cr17Ni7Al |
| KS | / |
| AFNOR | / |
| EN | / |
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Applications Usages
Precision Components: High-performance springs, washers, and fasteners requiring elastic retention at high temperatures.
Chemical Processing: Corrosion-resistant equipment, vessels, and piping systems used in aggressive chemical environments.
Thermal Processing: Shell and tube heat exchangers, condensers, and evaporators.
Power Generation: High-pressure power boilers and critical superheater tubing components.
Critical Environments: Structural components specifically engineered for high-strength and high-temperature service conditions.
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Drawing Formula
Formula: m = D (mm) × D (mm) × L (m) × ρ (g/cm³) × π ÷ 4000
D = Diameter, L = Length, ρ = Density, π = 3.1415926…
What is 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel
17-7PH, also known as stainless steel grade 631, stands out as a precipitation hardening alloy designed for demanding engineering environments. Its composition features chromium, nickel, and aluminum, which enable precipitation hardening and deliver high strength with excellent corrosion resistance. Stainless steel grade 17-7 ph achieves tensile yield strengths comparable to other advanced steels, reaching up to 1,730 MPa. The presence of chromium above 11% and nickel above 8% ensures corrosion resistance, while aluminum supports precipitation hardening. This steel excels in fatigue resistance and workability, making it essential in aerospace, medical, and high-performance engineering applications. Grade 17-7PH stainless steel provides a unique balance of high strength and corrosion resistance, supporting critical applications that require reliable properties and consistent performance.
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Chemical Composition
The chemical components of grade 17-7PH stainless steel is summarized in the following table:
| Grade | C | Mn | Si | P | S | Cr | Ni | Al |
| 631/17-7PH | 0.09 | 1.0 | 1.0 | 0.04 | 0.03 | 16.0-18.0 | 6.5-7.75 | 0.75-1.5 |
17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar Mechanical Properties
| Stainless Steel 17-7PH/631 | Tensile strength Rm N/mm2 | Yield strengt RP0.2N/mm2 | Elongatio A5% | Brinell hardnes HB |
| Solid melting 1000~1100℃ fast cooling | ≤1030 | ≤380 | ≥20 | ≤229 |
| Aging at 565℃ | ≥1140 | ≥960 | ≥5 | ≥363 |
| Aging at 510℃ | ≥1230 | ≥1030 | ≥4 | ≥388 |
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More Information About 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar
When you choose to buy 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar), there have some important points we need to know before we get started.
What is 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar?
17-7 PH stainless steel round bar, also known as Grade 631/UNS S17700/1.4568 stainless steel round bar rod. It’s a precipitation-hardening stainless steel that provides high strength and good corrosion resistance, making it suitable for various applications in aerospace, chemical processing, and other industries.
How to Purchase 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar
When purchasing round bars, it’s essential to have the right materials and information to ensure a smooth procurement process and to get the products that meet your needs.
Here’s what you need to provide:
1. Material: Specify the grade material, JIS SUS631 17-7PH EN 1.4568
2. Size: Specify the OD, length
3. Quantity: Provide the exact number of bars required for an accurate quotation.
4. Technical specifications: Include technical specifications and drawings. If there are unique design requirements, detailed drawings can be attached.
5. Quality standards: Specify quality standards and inspection requirements, such as the need for third-party inspection, material certification, and inspection reports.
6. Special requirements: Specify any special surface treatment, polishing, corrosion resistance requirements, etc.
7. Packaging requirements: If there are specific packaging needs, such as protective or anti-corrosion packaging, please specify.
8. Delivery time: Specify the expected delivery time and location.
By preparing the above information, you can streamline the process of purchasing bars and ensure that you receive high-quality products that meet your requirements.
Features of 17-7PH (SUS 631 / UNS S17700 / 1.4568) Stainless Steel Round Bar
1. High permeability
2. High saturation induction
3. Good corrosion resistant performance
4. Excellent mechanical property, high strength and toughness
5. Low temperature impact toughness
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