SS400 (JIS G3101, Japan), ASTM A36 (USA), and S235JR (EN 10025-2, Europe, 1.0038) are the three most commonly searched carbon structural steel grades in international steel trade. All three are directly equivalent to Q235B (GB/T 700, China) with a minimum yield strength of 235 MPa. At Zhongtang Steel, we supply all four designations from the same production line — you can order by any standard and receive material certified to your required specification.
Chemical Composition — Side by Side
Maximum allowable content (% by mass) across different international standards.
| Grade | Standard | C (%) | Si (%) | Mn (%) | P (%) | S (%) |
|---|---|---|---|---|---|---|
| Q235B | GB/T 700 | ≤0.22 | ≤0.35 | ≤1.40 | ≤0.045 | ≤0.045 |
| A36 | ASTM | ≤0.26 | ≤0.40 | ≤1.20 | ≤0.04 | ≤0.05 |
| SS400 | JIS G3101 | — | — | — | ≤0.05 | ≤0.05 |
| S235JR | EN 10025-2 | ≤0.21 | — | ≤1.40 | ≤0.045 | ≤0.045 |
Note: SS400 (JIS) specifies maximum P and S but does not restrict C, Si, Mn individually — manufacturer sets these within the mechanical property requirements.
Mechanical Properties — Side by Side
| Grade | Yield (MPa) | Tensile (MPa) | Elongation (%) | Impact (J) |
|---|---|---|---|---|
| Q235B | ≥235 | 370–500 | ≥26 | 27 @ 20°C |
| A36 | ≥250 | 400–550 | ≥23 | Not required |
| SS400 | ≥245 | 400–510 | ≥21 | Not required |
| S235JR | ≥235 | 360–510 | ≥26 | 27 @ 20°C |
Available Sizes & Delivery
| Thickness | 0.3–200 mm |
| Width | 1000–3000 mm |
| Length | 2500–12000 mm or as required |
| Delivery Condition | Hot rolled as-rolled / Normalized |
| Standards Available | GB/T 700, ASTM A36, JIS G3101, EN 10025-2 |
| Mill Test Certificate | EN 10204 3.1 with every shipment |
| Surface | Mill finish, pickled, or shot-blasted primed |
| MOQ | 3 Tons |
| Delivery Time | Within 7 days (≤500 tons) |
Why Order from Zhongtang Steel?
- One production line, all four standards — order by GB, ASTM, JIS, or EN; we certify to your required specification
- EN 10204 3.1 MTC supplied with every shipment
- ISO 9001 certified manufacturer since 1998
- Mill-direct pricing — no trading company markup
- Global shipping — FOB, CFR, CIF available
Applications
- General structural fabrication — beams, columns, angles
- Shipbuilding plates and marine structures
- Bridge components and highway guardrails
- Machinery bases and equipment frames
- Construction scaffolding and formwork
- Welded steel pipes and hollow sections
Values are typical reference ranges. Actual properties may vary by mill and production route. Mill test certificates (EN 10204 3.1) are supplied with every shipment — contact us for exact data sheets.
