JIS G4304 VS GB/T 4237
JIS G4304 and GB/T 4237 are standards for hot-rolled stainless steel plates, sheets, and strips, but they differ in several aspects. Below is a concise comparison of their key differences, tailored to the context of SHH STEEL’s 304/316 stainless steel plates, while keeping the response informative and within the requested scope.
Key Differences Between JIS G4304 and GB/T 4237
- Origin and Authority:
- JIS G4304: A Japanese Industrial Standard, issued by the Japanese Standards Association, widely used in Japan and internationally for hot-rolled stainless steel products.
- GB/T 4237: A Chinese national standard, issued by the Standardization Administration of China, primarily applied in China for hot-rolled stainless steel plates, sheets, and strips.
- Scope and Application:
- JIS G4304: Focuses on hot-rolled stainless steel plates, sheets, and strips for pressure vessels and general applications, emphasizing corrosion resistance and mechanical properties suitable for industries like automotive and chemical processing.
- GB/T 4237: Covers hot-rolled stainless steel for general purposes, including construction, machinery, and decoration, with a broader range of applications but less emphasis on pressure vessel-specific requirements.
- Material Grades:
- JIS G4304: Includes grades like SUS304 and SUS316, aligned with Japanese naming conventions, with specific chemical compositions and mechanical properties tailored to international standards.
- GB/T 4237: Uses Chinese grade designations (e.g., 06Cr19Ni10 for 304, 022Cr17Ni12Mo2 for 316), which may differ slightly in composition tolerances but are generally equivalent to international grades like 304/316.
- Chemical Composition Tolerances:
- JIS G4304: Specifies tighter tolerances for certain elements (e.g., carbon, chromium, nickel) to ensure consistency for pressure vessel applications. For example, SUS304 has a max carbon content of 0.08%.
- GB/T 4237: Allows slightly broader tolerances for some elements, reflecting flexibility for diverse applications. For 06Cr19Ni10 (304 equivalent), the max carbon content is also 0.08%, but minor variations in nickel or chromium may occur.
- Mechanical Properties:
- JIS G4304: Emphasizes mechanical properties like tensile strength and yield strength suitable for high-pressure environments. For SUS304, tensile strength is typically ≥520 MPa.
- GB/T 4237: Similar mechanical requirements but may include additional grades with slightly different strength or elongation properties to suit general-purpose applications. For 06Cr19Ni10, tensile strength is also ≥520 MPa, but test conditions may vary.
- Testing and Certification:
- JIS G4304: Requires specific tests like intergranular corrosion testing for pressure vessel grades, with strict compliance to Japanese quality standards.
- GB/T 4237: Includes similar tests but may have different sampling or inspection protocols, reflecting Chinese regulatory practices. Certification may align with domestic market needs.
- Dimensions and Tolerances:
- JIS G4304: Specifies dimensional tolerances optimized for Japanese manufacturing precision, with detailed requirements for thickness, width, and flatness.
- GB/T 4237: Offers comparable dimensional tolerances but may allow slightly wider ranges to accommodate varied production capabilities in China.
Relevance to SHH STEEL
SHH STEEL’s 304/316 stainless steel plates comply with both JIS G4304 and GB/T 4237, ensuring corrosion resistance, high strength, and durability for applications like construction, automotive, and chemical pipelines.
While JIS G4304 is more tailored to pressure vessels with stricter tolerances, GB/T 4237 offers flexibility for broader general-purpose uses. Both standards guarantee certified quality, competitive pricing, and customizable options, making SHH STEEL a reliable supplier for diverse industry needs.
JIS G4304 & GB/T 4237 Stainless Steel Plates by SHH STEEL
SHH STEEL offers JIS G4304 & GB/T 4237-compliant 304/316 plates. Hot-rolled, corrosion-resistant, durable for pressure vessels and general use. Certified quality, competitive prices, customizable. Trust SHH STEEL!
