Q235B Carbon Structural Stahl (GB/T 700): Chinese Norm
GB/T 700-2006 · Published: 2026-05-22 · Updated: July 2026
Q235B is China's fundamental carbon structural steel under GB/T 700-2006 and one of the most produced steel grades globally. The 'Q' prefix denotes yield strength of 235 MPa minimum for thicknesses ≤16 mm. Grade B provides guaranteed Charpy...
Q235B ist China's fundamental carbon structural steel unter GB/T 700-2006 und one von der meiste produced steel grades globally. Der 'Q' prefix denotes yield strength von 235 MPa minimum für thicknesses ≤16 mm. Güte B provides guaranteed Charpy V-notch impact toughness (≥27 J bei +20°C), making es suitable für welded building structures und bridges. Mit approximately 0.12-0.20% carbon, Q235B welds well ohne preheat für sections unter 30 mm.
Quick Facts
| Kategorie | Kohlenstoffstahl |
| Norm | GB/T 700-2006 |
| Density | 7.85 g/cm³ |
| Yield Strength | 235 MPa (34 ksi) |
| Tensile Strength | 370-500 MPa (54-73 ksi) |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| ASTM A36 | Compare |
| S235JR | Compare |
| SS400 | Compare |
| E250 | Compare |
| St37-2 | Compare |
Verwandt Comparisons
Verwandt Materials
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Frequently Asked Questions
Was ist der difference zwischen Q235A und Q235B?
Q235B requires guaranteed Charpy V-notch impact values (≥27 J bei +20°C), while Q235A hat nein impact testen requirement. Q235B auch hat tighter limits ein sulfur. Für welded structural applications, Q235B ist der minimum recommended grade.
References & International Standards
- ASTM International. Norm Specifications für Stahl & Metal Alloys. astm.org
- International Organization für Standardization (ISO). Metallic Materials — Cross-Referenz Database. iso.org
- American Iron und Stahl Institute (AISI). Stahl Güte Designations & Equivalents. steel.org
- European Committee für Standardization (CEN). EN Stahl Standards & Numbering System. cencenelec.eu