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Help CenterHigh Hardness JIS SUS420 Stainless Round Bar Heat Treatable For Cutting Tool & Mold Parts
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Welcome to Wuxi Yansheng Technology Co., Ltd. – a trusted manufacturer with over 7 years of experience in stainless steel products. Our High Hardness JIS SUS420 Stainless Round Bar is designed specifically for demanding applications such as cutting tools and mold parts. With a factory size of 1,000-3,000 square meters and a team of 101-200 skilled employees, we ensure rigorous quality control and consistent supply. This product combines exceptional hardness, heat treatability, and corrosion resistance, making it a preferred choice for precision tooling and mold making.
Key Features & Technical Specifications
High Hardness: Achieves HRC 50-55 after proper heat treatment, ensuring excellent wear resistance for cutting tools and mold cavities.
Heat Treatable: Can be annealed, quenched, and tempered to meet specific hardness requirements. Offers flexibility in processing.
JIS SUS420 Stainless Steel: Martensitic stainless steel with good corrosion resistance, suitable for applications where both strength and rust prevention are needed.
Precise Dimensions: Available in diameters from 10mm to 300mm and lengths from 1m to 6m, with tight tolerances (h9 or better).
Superior Surface Finish: Options include black (oxidized), bright drawn, or polished surface to match your manufacturing requirements.
Consistent Quality: Each bar is inspected for chemical composition, hardness, and dimensional accuracy before shipment.
| Parameter | Value |
|---|---|
| Material Grade | JIS SUS420 (AISI 420 equivalent) |
| Carbon Content | 0.15% – 0.40% (typical) |
| Hardness (Annealed) | ≤ HRC 25 |
| Hardness (Quenched & Tempered) | HRC 50 – 55 |
| Tensile Strength | ≥ 700 MPa (after heat treatment) |
| Standard | JIS G4303, JIS G4304 |
Advantages for Cutting Tools & Mold Parts
Longer Tool Life: The high hardness reduces wear and deformation, extending the service life of cutting tools and mold inserts.
Excellent Edge Retention: Ideal for knives, shear blades, and stamping dies that require sharp edges.
Good Corrosion Resistance: Suitable for use in humid environments or when cutting materials that generate corrosive byproducts.
Easy Machinability in Annealed State: Can be easily turned, milled, and drilled before heat treatment, reducing production costs.
Customizable Dimensions: We offer custom cutting and tolerance control to meet your specific mold or tool design.
Why Choose Wuxi Yansheng Technology?
As a manufacturer with an annual export value of US$50-100 million, we serve clients across North America, Europe, Asia, and beyond. Our factory holds multiple certifications including ISO9001, ISO14000, OHSAS18001, and HACCP (where applicable), ensuring our production processes meet international standards. We ship from Tianjin, Shanghai, Qingdao, and Ningbo ports, offering flexible logistics. Every batch of SUS420 round bar is traceable and tested for chemical composition and mechanical properties. We are committed to providing high-quality materials that help you build reliable tools and molds.
Contact us today to request a quote or discuss your specific requirements. Our team is ready to support you with technical advice and competitive pricing.
Frequently Asked Questions (FAQ)
Q: What is the typical hardness of SUS420 round bar after heat treatment?
A: After proper quenching and tempering, the hardness typically reaches HRC 50-55. The exact value depends on the specific heat treatment process and section size.Q: Can you provide the bar in a pre-hardened condition?
A: Yes, we offer pre-hardened condition (e.g., HRC 30-35) for applications that require immediate use without further heat treatment. Please specify your requirement.Q: What lengths and diameters are available?
A: Standard diameters range from 10mm to 300mm, and lengths from 1m to 6m. Custom sizes are available upon request with minimum order quantity.Q: Is this material suitable for plastic injection mold cores?
A: Yes, SUS420 is commonly used for mold parts that require good wear resistance and moderate corrosion resistance. However, for high-corrosion environments, we recommend considering 420F or 440C.Q: Do you provide material test certificates?
A: Absolutely. Each shipment includes a mill test certificate (MTC) with chemical composition and mechanical properties. Third-party inspection is also available upon request.Q: What surface finishes are offered?
A: We offer black (oxidized), bright drawn, turned, and polished finishes. The surface roughness can be controlled to Ra ≤ 1.6 μm for polished bars.Q: How does your pricing compare to other suppliers?
A: As a factory direct supplier, we offer competitive pricing without sacrificing quality. We also provide volume discounts for large orders. Please contact us for a customized quote.Q: What is the lead time for standard orders?
A: For standard sizes and quantities, lead time is typically 15-20 working days. Rush orders can be arranged with additional charges.
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