With increasing demand in fields such as mechanical engineering, shaft components, pump assemblies, aerospace parts, and automotive components, the price of SUS431 cold-rolled stainless steel sheets has fluctuated significantly. As a professional buyer, it's crucial to understand these price fluctuations, determine if this material is suitable for the project's needs, and how to control overall procurement costs.
SUS431 Cold-Rolled Sheet Price Per Ton (Reference Only)
The price of SUS431 cold-rolled stainless steel sheet (for example, 2.0 mm thick) is approximately 20,000-25,000 RMB per ton. The specific price varies depending on nickel price fluctuations, order quantity, and specific specifications (tolerance, surface finish). Due to its lower nickel content (1.25%-2.5%, compared to 8%-10.5% for SUS304), its price is usually 10%-20% lower than SUS304, but still higher than ferritic stainless steel grades such as SUS430.
⚠️ Prices vary by market, size, and order volume. The data below is for industry reference, not a fixed quotation.
| Product Type | Indicative Price Range (USD/MT) |
|---|---|
| SUS431 Cold-Rolled Sheet (2B) | 2,300 – 3,100 |
| SUS431 Cold-Rolled Sheet (BA) | 2,600 – 3,500 |
Compared with 304 cold-rolled sheets, SUS431 often offers higher strength at a competitive or slightly lower price per ton, making it attractive for structural and mechanical applications.
What Is SUS431 Cold-Rolled Stainless Steel Sheet?
SUS431 is a martensitic stainless steel produced through a cold rolling process to achieve strict thickness tolerances, a smooth surface finish, and excellent mechanical properties. It exhibits better corrosion resistance than ordinary grades in certain environments (such as marine environments), making it ideal for high-stress components such as shafts and bolts. However, due to its high yield strength, it can be heat-treated but is not easily cold-worked. The cold rolling process further enhances its hardness and strength, exceeding its basic properties, making it suitable for demanding components requiring exceptional durability and wear resistance.
SUS431 Cold-Rolled Stainless Steel Sheet Specifications
| Item | Specification |
|---|---|
| Material Grade | SUS431 |
| Steel Type | Martensitic Stainless Steel |
| Standard | JIS G4305 |
| Supply Form | Cold-Rolled Sheet |
| Thickness Range | 0.4 – 6.0 mm |
| Width | 1000 / 1219 / 1500 mm |
| Length | 2000 / 2438 / Custom |
| Surface Finish | 2B / BA |
| Condition | Annealed / Heat Treatable |
| Certification | MTC, Chemical & Mechanical Test |
Chemical Composition of SUS431 Stainless Steel (wt.%)
| Element | Content |
|---|---|
| Chromium (Cr) | 15.0 – 17.0 |
| Carbon (C) | ≤ 0.20 |
| Nickel (Ni) | ≤ 2.0 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties of SUS431 (Typical)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 750 MPa |
| Yield Strength | ≥ 520 MPa |
| Elongation | ≥ 15% |
| Hardness (Annealed) | ≤ 235 HB |
| Heat Treat Response | Excellent |
Is SUS431 stainless steel plate magnetic?
Yes. SUS431 is fully magnetic and therefore suitable for mechanical and electromagnetic applications.
Can SUS431 cold-rolled plate be heat treated?
Yes. SUS431 has excellent heat treatment properties, which can significantly improve tensile strength and hardness.
Is SUS431 corrosion resistant?
Yes, SUS431 has moderate corrosion resistance, containing 15-17% chromium and 1.25-2.5% nickel (PREN ≈ 22-25), and performs reliably in atmospheric, weakly oxidizing, and low-chloride environments. However, its pitting/crevice corrosion resistance in 3% sodium chloride solution (critical pitting temperature approximately 15-25°C) is not as good as austenitic stainless steels such as 316 (critical pitting temperature approximately 30-45°C).
*Packaging: Bare bundles, reinforced with horizontal steel straps
*Quantity: Customized as required
*Marking: Spray paint marking or labels/stickers on the top surface of the bundle, indicating the required information
*Surface Treatment: 2B, 2D, BA, No. 1, No. 4, satin finish and brushed finish
*Testing: Chemical composition analysis, tensile test, flattening test, impact test, leak test, dimensional inspection, visual inspection,
Non-destructive testing
*Test Certificates: Factory test certificate, third-party inspection report, and raw material certificate
*Delivery Time: Stock items shipped immediately, customized products delivered within 15-30 days
*Value-added Services: Pre-treatment, parts cutting, third-party inspection, sample service, ultrasonic testing, and dimensional inspection
