Product List
Gangsteel Material Solution
Email: admin@gangsteel.com
Sales: jack@gangsteel.com
Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S420M Steel Equivalent ASTM JIS GB Grade Plates
Gangsteel is the professional supplier you can trust for S420M steel equivalent ASTM JIS GB grade plates, with the largest permanent stock in Asia – over 4,000 tons always ready in thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters. All plates are genuine TMCP produced by top mills with full European approvals and third-party inspection (DNV-GL, ABS, LR, BV, CCS, KR, TÜV, SGS).
We supply S420M with dual/triple certification to ASTM, JIS, and GB equivalents when required, Z35 through-thickness quality in stock, 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 for all grades.
S420M equivalent refers to international steel grades that match or closely approximate S420M under EN 10025-4:2004 (2019)—a thermomechanically rolled (TMCP) weldable fine-grain structural steel with 420 MPa minimum yield strength and ≥40 J Charpy V-notch at –20 °C longitudinal.
The most common S420M steel equivalents are:
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A572 Gr.60 + Z35 |
Yield 415 MPa; add –20 °C KV & Z-test |
U.S. cranes & structures |
|
JIS G 3106 |
SM490YB |
Rm 490–610 MPa; similar fine grain |
Japanese lifting equipment |
|
GB/T 1591 |
Q420C |
Exact chemistry & properties match |
China domestic & export |
|
API 2H / 2W |
Grade 50 |
Offshore weldable; TMCP compatible |
Marine structures |
|
EN 10025-3 |
S420N |
Normalized version (same properties) |
When normalizing required |
Gangsteel supplies dual-certified S420M + Q420C or S420M + A572 Gr.60 plates when required.
|
Element |
S420M (EN 10025-4) max % |
Q420C (GB/T 1591) max % |
A572 Gr.60 (ASTM) max % |
Difference & Impact |
|---|---|---|---|---|
|
C |
0.16 |
0.20 |
0.26 |
Lower C in S420M = better HAZ |
|
Si |
0.50 |
0.55 |
0.40 |
Similar |
|
Mn |
1.70 |
1.70 |
1.35 |
Similar |
|
P |
0.030 |
0.030 |
0.040 |
Tighter in S420M |
|
S |
0.025 |
0.030 |
0.050 |
Lower S in S420M |
|
Nb + V + Ti |
0.22 combined |
0.20 combined |
Limited |
Similar microalloying |
|
CEV max |
0.48 |
0.50 |
0.48 |
S420M best weldability |
S420M has the tightest chemistry → superior HAZ toughness and preheat-free welding.
|
Property |
S420M (EN 10025-4) |
Q420C (GB/T 1591) |
A572 Gr.60 (ASTM) |
Notes |
|---|---|---|---|---|
|
Yield Strength ReH (MPa) |
420 (≤16 mm) → 340–360 (>150 mm) |
420 (≤16 mm) → 340 (>100 mm) |
415 (all thicknesses) |
S420M better in thick plates |
|
Tensile Strength Rm (MPa) |
520–680 |
520–680 |
520 min |
Similar |
|
Elongation A5 (%) |
≥19 |
≥19 |
≥21 |
Similar |
|
Impact Toughness (long.) |
≥40 J at –20 °C |
≥34 J at 0 °C (optional –20 °C) |
No mandatory low-temp |
S420M superior |
S420M offers better thick-plate yield and guaranteed low-temp toughness compared to most equivalents.
Q1: Best S420M equivalent for U.S. projects?A: A572 Gr.60 + Z35; yield 415 MPa close, add –20 °C KV for full match. Dual-cert available.
Q2: JIS equivalent for S420M?A: SM490YB; Rm 490–610 MPa equiv. Dual-cert for Japanese-EU JV.
Q3: GB/T 1591 equivalent?A: Q420C – identical chemistry and properties. Gangsteel supplies dual-certified S420M + Q420C plates.
Q4: Can I use Q420C instead of S420M?A: Yes for general structural, but S420M required for European certification or guaranteed –20 °C impact.
Q5: Price difference between S420M and Q420C?A: S420M 50–100 USD/ton higher than Q420C due to European certs and TMCP properties.
Q6: Z35 availability for equivalents?A: Yes – large stock of S420M + Z35 and Q420C + Z35 ready.
Q7: Delivery time to China or Europe?A: Stock material 3–7 days worldwide.
Need S420M 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 S420M and All Equivalents.
ASTM A516 GR 70 equivalent materials is such as ASME SA516 GR 70, EN 10028 P355GH, and BS1501 224-490 A & B, sh
we supply high-quality A516 Gr 70 steel plate for pressure vessel applications and other standards like ASTM A2
EN10028-2 P355GH for High-Strength Low-Alloy Columbium-Vanadium Structural Steel EN10025-2 S355J2 Structural St
We export A240 304L Stainless Coil 2B, NO.1 No.4 surface, the thickness 0.1mm to 3mm, 3mm to 22mm, Mother mill
