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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355M Steel Equivalent EN 10025-4 Plates
Gangsteel is your one-stop supplier for S355M steel equivalent EN 10025-4 plates and direct cross-reference grades worldwide. We stock over 4,000 tons of genuine S355M (EN 10025-4 TMCP) and its international equivalents in thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters. All plates are produced by top mills (HBIS, Shougang) with full European approvals and third-party inspection (DNV, ABS, LR, BV, CCS, KR, TÜV, SGS).
We offer dual-certified and triple-certified plates (EN + ASTM + GB or JIS) with full documentation, Z35 through-thickness quality in stock, and 100 % UT EN 10160 S2/E2 standard.
Immediate delivery worldwide in 3–7 days. Full processing services available.
Explore our complete en 10025 4 High Strength Structural Steel series.
S355M is a thermomechanically rolled (TMCP) weldable fine-grain structural steel per EN 10025-4:2004 (2019 revision) with:
The most common S355M steel equivalents used globally are:
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A572 Gr.50 + Z35 |
Yield 345 MPa; add –20 °C KV & Z-test |
U.S. bridges & structures |
|
JIS G 3106 |
SM490B |
Rm 490–610 MPa; similar fine grain |
Japanese general fabrication |
|
GB/T 1591 |
Q355C |
Exact chemistry & properties match |
China domestic & export |
|
API 2H / 2W |
Grade 50 |
Offshore weldable; TMCP compatible |
Gulf/Baltic platforms |
|
EN 10025-3 |
S355N |
Normalized version (same properties) |
When normalizing required |
|
EN 10025-6 |
S355QL |
QT high-strength alternative |
Heavy lifting equipment |
Gangsteel supplies dual-certified S355M + Q355C or S355M + A572 Gr.50 plates when required.
|
Element |
S355M (EN 10025-4) max % |
Q355C (GB/T 1591) max % |
A572 Gr.50 (ASTM) max % |
Difference & Impact |
|---|---|---|---|---|
|
C |
0.14 |
0.18 |
0.23 |
Lower C in S355M = better weldability |
|
Si |
0.50 |
0.55 |
0.40 |
Similar |
|
Mn |
1.60 |
1.70 |
1.35 |
Similar |
|
P |
0.025 |
0.030 |
0.040 |
Tighter in S355M |
|
S |
0.020 |
0.030 |
0.050 |
Much lower in S355M |
|
Nb + V + Ti |
0.20 combined |
0.20 combined |
Limited |
Similar microalloying |
|
CEV max |
0.39 |
0.43 |
0.45 |
S355M best weldability |
S355M has the tightest chemistry among equivalents → superior HAZ toughness and preheat-free welding.
|
Property |
S355M (EN 10025-4) |
Q355C (GB/T 1591) |
A572 Gr.50 (ASTM) |
Notes |
|---|---|---|---|---|
|
Yield Strength ReH (MPa) |
355 (≤16 mm) → 285–295 (>150 mm) |
355 (≤16 mm) → 275 (>100 mm) |
345 (all thicknesses) |
S355M stronger in thick plates |
|
Tensile Strength Rm (MPa) |
470–630 |
470–630 |
450 min |
Similar |
|
Elongation A5 (%) |
≥22 |
≥22 |
≥21 |
Similar |
|
Impact Toughness (long.) |
≥40 J at –20 °C |
≥34 J at –20 °C (optional –40 °C) |
No mandatory low-temp |
S355M superior |
|
CEV max |
0.39 |
0.43 |
0.45 |
S355M best weldability |
S355M offers better thick-plate yield and guaranteed low-temp toughness compared to most equivalents.
Q1: What is the best ASTM equivalent for S355M?A: A572 Gr.50 + Z35 with additional –20 °C impact testing is the closest. Many projects accept S355M directly.
Q2: What is the GB/T 1591 equivalent?A: Q355C – identical chemistry and properties. Gangsteel supplies dual-certified S355M + Q355C plates.
Q3: Can I use S355M instead of S355N?A: Yes – S355M is the modern TMCP replacement for normalized S355N with better properties.
Q4: Price difference between S355M and Q355C?A: S355M is 50–100 USD/ton higher than Q355C, but worth it for European certification and better thick-plate strength.
Q5: Do you have Z35 in stock?A: Yes – large stock of S355M + Z35 ready for immediate delivery.
Q6: Delivery time to USA or Europe?A: Stock material 7–12 days to major ports (Houston, Rotterdam).
Q7: Can you supply triple-certified plates?A: Yes – EN 10025-4 S355M + ASTM A572 Gr.50 + GB/T 1591 Q355C is common from our stock.
Need S355M or equivalent plates? Contact us for quotation within 2 hours.
Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/
Gangsteel – Your Global Expert for S355M and All Equivalents.
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