All Jiangsu Ranboyu Metal Products Co.,Ltd products are manufactured to international standards — ASTM, ASME, EN, DIN, JIS, GB, and ISO — ensuring quality, consistency, and global compatibility.
International standards define the chemical composition, mechanical properties, dimensional tolerances, and testing requirements for metal products. Our products are certified to the standards most commonly specified for each material family and application. Below is our comprehensive standards reference organized by issuing body.
ASTM International (formerly American Society for Testing and Materials) and ASME (American Society of Mechanical Engineers) publish the most widely referenced metal standards globally. Jiangsu Ranboyu Metal Products Co.,Ltd products are routinely certified to these specifications.
European Norms (EN) and German Industrial Standards (DIN) are the primary metal standards used across the European Union. EN standards have largely superseded national standards, though DIN designations remain widely referenced in industry.
Japanese Industrial Standards (JIS) are widely used in Asia-Pacific markets and are commonly specified for projects with Japanese engineering and procurement requirements. Jiangsu Ranboyu Metal Products Co.,Ltd supplies products certified to all commonly requested JIS grades.
Chinese National Standards (GB/Guobiao) are mandatory standards for products sold and used within China and are increasingly specified in international projects. Jiangsu Ranboyu Metal Products Co.,Ltd products are fully compliant with all relevant GB standards and are produced with complete Chinese certification documentation.
GOST standards are used for metal procurement across Russia and the Eurasian market. We can support specification review, grade cross-reference, and mill documentation for projects requiring GOST-compliant materials.
The International Organization for Standardization (ISO) publishes management system standards that form the foundation of Jiangsu Ranboyu Metal Products Co.,Ltd's quality, environmental, and safety programs. While ISO does not typically define material grade specifications (that role falls to ASTM, EN, JIS, etc.), ISO management system certifications are essential credentials for global supply chains.
Certified quality management system ensuring consistent product quality, complete traceability, and continuous improvement across all operations.
Certified environmental management system demonstrating our commitment to sustainable manufacturing and minimized environmental footprint.
Certified OH&S management system ensuring safe working conditions and systematic hazard identification and risk assessment.
Equivalent grades across ASTM, EN, JIS, and GB standards for common materials across all four product families
Our engineering team can provide full material certifications to any required international standard. Third-party inspection by SGS, BV, TÜV, or Lloyd's Register is welcomed on all orders.