17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar
As a leading China 17-4PH (SUS 630 / UNS S17400 / 1.4542) stainless steel round bar supplier, SEATHER manufactures and produces different length and diameter of 17-4PH stainless steel round bar rod.
It features better corrosion resistance than general martensitic stainless steel and higher strength than common austenite.
Grade 17-4PH 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!
17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar Specifications Srtandard
| Alloy Grade | 17-4PH, AISI 630, UNS S17400, W.Nr.1.4542, SUS630 |
| Standard | ASTM A564 |
| Surface Finish | Bright, Pickling, Black, Polished |
| Shape | Round Bar |
| Outer Diameter | 6mm – 600mm |
| Raw Material | POSCO, Baowu, TISCO, SEATHER, Outokumpu |
17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar Equivalent Grade
| STANDARD | SS 17-4PH |
| WERKSTOFF NR. | 1.4542 |
| UNS | S17400 |
| JIS | SUS 630 |
| BS | / |
| KS | / |
| AFNOR | / |
| EN | / |
17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar Applications Usages
- Oil field equipment
- Chemical process equipment
- Fittings and pump shafts
- Gears
- Paper mill equipment
- Aircraft parts
- Flanges and valves
- Other Precision Parts
17-4PH (SUS 630 / UNS S17400 / 1.4542) 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 17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel
17-4PH precipitation hardening martensitic stainless steel, also known as UNS S17400 or Type 630, belongs to the family of martensitic stainless steels. This alloy contains approximately 15-17.5% chromium, 3-5% nickel, and 3-5% copper, with iron as the base element. Engineers and manufacturers often refer to it as 17-4 ph stainless steel or grade 17-4 stainless steel. The term “precipitation hardening” describes the process that gives this steel its remarkable strength and hardness. By using a series of heat treatments, manufacturers create fine particles within the steel’s structure. These particles, called precipitates, block the movement of dislocations and increase the material’s mechanical properties.
The development of 17-4 ph stainless steel began in the early 20th century. William J. Kroll’s research on precipitation hardening paved the way for Armco to introduce this alloy in 1948. The first applications appeared in aerospace, where engineers needed materials that could withstand high stress and resist corrosion. Over time, grade 17-4 stainless steel became a standard choice for critical components in industries such as nuclear power, oil and gas, and marine engineering.
17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar Chemical Composition
The chemical components of grade 17-4PH stainless steel strip is summarized in the following table:
| C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
| 0.07 max | 1.00 max | 1.00 max | 0.040 max | 0.030 max | 15.00~17.50 | 3.0~5.0 | 3.0~5.0 | 0.15~0.45 |
17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar Mechanical Properties
| Property | A | H 900 | H 925 | H 1025 | H 1075 | H 1150 | H 1150-M |
| UTS | 1103 | 1448 | 1379 | 1276 | 1207 | 1103 | 1034 |
| 0.2% YS | 1000 | 1379 | 1345 | 1172 | 1148 | 1034 | 896 |
| Elongation % in 50mm | 5 | 7 | 8 | 8 | 8 | 11 | 12 |
| Hardness (rockwell) | C35 | C45 | C43 | C38 | C37 | C35 | C33 |
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More Information About 17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar
When you choose to buy 17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar, there have some important points we need to know before we get started.
What is 17-4PH (SUS 630 / UNS S17400 / 1.4542) Stainless Steel Round Bar ?
17-4PH stainless steel round bar, also known as UNS S17400/630 precipitation hardening stainless steel round bar, is a martensitic stainless steel alloy containing copper and niobium/columb.
Through heat treatment, the mechanical properties of the plate product can be significantly improved, achieving a remarkable compressive strength ranging from 1100 to 1300 Mpa (160-190 ksi).
How to Purchase 17-4PH (SUS 630 / UNS S17400 / 1.4542) 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,
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 17-4PH (SUS 630 / UNS S17400 / 1.4542) 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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