Shanghai, September 12, 2025, 07:10 AM PDT – SHH STEEL, a leading steel supplier, provides a technical comparison of global steel standards—ASTM (American), EN (European), JIS (Japanese), and GB (Chinese)—to assist buyers in selecting materials for construction, marine, and industrial applications. Understanding these standards ensures compliance, quality, and performance, critical for projects worldwide.
| Standard | Organization | Key Scope | Example Grade | Certification Process | Global Adoption |
| ASTM | ASTM International | Structural, pressure vessel | A516 Gr.70 | Annual review, ANSI accredited | 140+ countries |
| EN | CEN (European) | Structural, pressure, marine | P355GH | Harmonized EN standards | EU, global export |
| JIS | JISC (Japanese) | General, shipbuilding | SS400 | JIS Mark certification | Japan, Asia-Pacific |
| GB | SAC (Chinese) | Construction, industrial | Q235B | GB/T compliance testing | China, emerging markets |
Mechanical Property Comparison Standards differ in tensile strength, yield, and impact requirements. For carbon steel plates:
| Property | ASTM A516 Gr.70 | EN 10028-2 P355GH | JIS G3101 SS400 | GB/T 700 Q235B |
| Tensile Strength (MPa) | 485-620 | 490-630 | 400-510 | 370-500 |
| Yield Strength (MPa) | 260 | 355 | 245 | 235 |
| Elongation (%) | 17 | 22 | 17 | 26 |
| Impact Energy (J) @ -20°C | 27 | 34 | 27 | 27 |
Technical Data Insight: ASTM A516 Gr.70, widely used for pressure vessels, offers a higher tensile range (485-620 MPa) than GB/T 700 Q235B (370-500 MPa), making it suitable for high-pressure environments. EN 10028-2 P355GH’s 355 MPa yield exceeds JIS G3101 SS400’s 245 MPa, ideal for European structural codes. Buyers should select based on project load and temperature, with SHH STEEL providing mill test certificates for compliance.
Chemical Composition Limits Corrosion resistance and weldability depend on alloying elements:
| Element (%) | ASTM A516 Gr.70 | EN 10028-2 P355GH | JIS G3101 SS400 | GB/T 700 Q235B |
| Carbon (C) | 0.27 max | 0.20 max | 0.25 max | 0.22 max |
| Manganese (Mn) | 0.85-1.20 | 1.10-1.70 | 0.60-1.40 | 0.30-0.65 |
| Phosphorus (P) | 0.035 max | 0.025 max | 0.050 max | 0.045 max |
| Sulfur (S) | 0.035 max | 0.015 max | 0.050 max | 0.045 max |
Interpretation: EN P355GH’s lower sulfur (0.015%) enhances weldability over ASTM A516’s 0.035%, while JIS SS400’s higher manganese (0.60-1.40%) boosts strength. GB Q235B’s 0.22% carbon limit suits general use but lags in high-corrosion settings. SHH STEEL recommends matching composition to environment, e.g., ASTM A240 316L for marine.
Application Guidelines
SHH STEEL’s expertise ensures buyers select the right standard, supported by our in-house testing (ASTM E8, ISO 6892-1) for mechanical validation.
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