S275M Chemical Composition EN 10025-4 Supplier

 

 

S275M Chemical Composition EN 10025-4 Supplier

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S275M Chemical Composition EN 10025-4 Steel Plates

Gangsteel is the professional supplier you can trust for S275M chemical composition EN 10025-4 steel plates, with the largest permanent stock in Asia – over 5,000 tons always ready in thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters. All plates are genuine TMCP (thermomechanical controlled process) produced by top Chinese mills (HBIS, Shougang, Nanjing Steel) with full European approvals (PED 2014/68/EU, CPR 305/2011).

We supply with original EN 10204-3.1/3.2 certificates that include complete chemical composition for every heat number, plus third-party inspection (DNV-GL, ABS, LR, BV, CCS, KR, TÜV, SGS). Z25/Z35 through-thickness quality in stock, 100 % ultrasonic testing EN 10160 S2/E2 standard.

Immediate delivery worldwide in 3–7 days. Full processing services: plasma/oxy cutting, beveling, drilling, rolling, priming.

Explore our complete en 10025 4 High Strength Structural Steel series for all grades, including the popular low-temperature grade en 10025 4 s275ml steel plate and en 10025 4 s275m steel plate, standard-temperature en 10025 4 s355m steel plate, mid-range en 10025 4 s355ml steel plate and en 10025 4 s420ml steel plate, higher-strength en 10025 4 s460m steel plate, and top-end en 10025 4 s460ml steel plate.

 

What is S275M Chemical Composition EN 10025-4?

S275M is a thermomechanically rolled (TMCP) weldable fine-grain structural steel specified in EN 10025-4:2004 (current version 2019).

The chemical composition of S275M is carefully controlled to deliver:

• High strength (275 MPa minimum yield)
• Excellent weldability (CEV ≤ 0.38)
• Fine grain structure for superior toughness and fatigue resistance

The low carbon and tightly controlled alloying elements, combined with the TMCP process, are what make S275M one of the most weldable and reliable entry-level high-strength structural steels available.

 

Chemical Composition – Ladle and Product Analysis Combined

The table below shows both ladle analysis (maximum values from the melt) and product analysis (permitted deviations on the finished plate) as per EN 10025-4 and EN 10025-1 Table 4.

Element	Ladle Max (%)	Product Deviation (%)	Typical Actual (%) – Gangsteel Stock	Role in S275M Performance
C	0.14	+0.02	0.09–0.12	Low carbon = excellent weldability & HAZ toughness
Si	0.50	+0.05	0.20–0.40	Deoxidizer; minor strength contribution
Mn	1.50	+0.10	1.10–1.40	Primary strength element
P	0.030	+0.005	≤0.018	Very low for toughness and ductility
S	0.025	+0.005	≤0.015	Low inclusions = better impact values
Nb	0.05	+0.01	0.02–0.04	Main grain refiner (NbC pinning)
V	0.10	+0.02	0.04–0.08	Precipitation strengthening
Al min	0.020	+0.030 (total)	0.025–0.045	Strong deoxidizer & grain refiner
Ti	0.05	+0.03	0.01–0.03	TiN particles pin austenite grains
Cr	0.30	+0.05	0.10–0.25	Controlled for balanced hardenability
Ni	0.30	+0.05	0.15–0.25	Improves low-temp toughness
Mo	0.10	+0.03	≤0.05	Minor HAZ improvement
Cu	0.55	+0.03	0.20–0.35	Deoxidizer
N	0.015	+0.003	≤0.012	Low for clean steel matrix
CEV max	0.38	N/A	0.32–0.36	Excellent weldability – no preheat up to 100 mm

CEV formula: C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

Typical Gangsteel actual CEV = 0.32–0.36 → one of the lowest in the market, giving outstanding welding performance.

 

Mechanical Properties – Full Thickness Range up to 200 mm (transverse values)

Thickness (mm)	ReH min (MPa)	Rm (MPa)	A5 min (%)	KV min (J) at –20 °C longitudinal
≤ 16	275	370–530	24	40
>16 ≤ 40	265	370–530	24	40
>40 ≤ 63	255	370–530	24	40
>63 ≤ 80	245	370–530	24	40
>80 ≤ 100	235	370–530	24	40
>100 ≤ 120	235	360–520	24	40
>120 ≤ 150	225	360–520	24	40
>150 ≤ 200	215–225*	360–520	24	40

*Gangsteel guarantees higher values in thick plates by agreement.

Hardness: 130–170 HBW Density: 7.85 g/cm³

 

Available Specifications & Testing

• Thickness: 6–200 mm (20–120 mm most popular in stock)
• Width: 1500–4200 mm
• Length: up to 18 000 mm
• Z-quality: Z25 standard, Z35 large stock
• NDT: 100 % ultrasonic testing EN 10160 S2/E2 (S3/E3 optional)
• Surface: shot-blasted + primer or mill finish
• Certification: EN 10204-3.1/3.2, PED, CPR, all major class approvals

 

Applications of S275M Fine Grain Material

S275M is widely used when the service temperature is above –20 °C:

• Light structural frames
• Onshore wind turbine towers
• Heavy machinery bases
• Bridge components
• General fabrication

When the temperature drops below –20 °C, the low-temperature version S275ML is required.

 

Why Choose Gangsteel for S275M Chemical Composition Plates

• Largest S275M stock in Asia (5,000+ tons ready)
• Factory-direct price – 60–120 USD/ton lower than traders
• Full processing capability (cutting, beveling, drilling, rolling, priming)
• Z35 quality always in stock
• Immediate delivery worldwide
• Exported to 90+ countries with perfect documentation
• One-stop service – stock → processing → shipping

 

Summary

S275M EN 10025-4 is a TMCP weldable fine-grain structural steel with 275 MPa yield strength and ≥40 J impact at –20 °C, featuring a tightly controlled chemical composition (CEV ≤0.38) for excellent weldability and toughness. Gangsteel stocks over 5,000 tons of S275M with full chemical certification and fast delivery, making it the reliable choice for light structures, onshore wind, and general fabrication.

FAQ – Detailed Answers

Q1: What is the typical CEV of your S275M plates?

A: Our actual CEV is 0.32–0.36, significantly lower than the maximum 0.38 allowed by the standard. This gives outstanding weldability – no preheating required up to 100 mm thickness in most conditions.

Q2: Why is the carbon content so low in S275M?

A: Low carbon (0.09–0.12 % actual) is essential for the TMCP process and excellent HAZ toughness after welding. It also contributes to the very low CEV and high impact values.

Q3: How do you control P and S levels?

A: We use vacuum degassing (VD) and strict raw material selection to keep P+S ≤0.030 % (often ≤0.025 %). This ensures clean steel with minimal inclusions and maximum toughness.

Q4: Can you supply S275M with even tighter chemistry?

A: Yes – for special offshore or pressure vessel applications, we can offer P+S ≤0.020 %, C ≤0.10 %, or other restrictions by agreement.

Q5: Do you provide chemical composition certificates?

A: Every plate is supplied with EN 10204-3.1 or 3.2 certificate showing complete ladle and product analysis for the specific heat number.

Q6: What is the difference between S275M and S275ML chemistry?

A: The chemical composition is exactly the same. The only difference is the impact test temperature (S275M –20 °C, S275ML –50 °C).

Q7: How fast can you deliver with full chemical certificates?

A: From ready stock: 3–7 days worldwide, including all certificates and third-party inspection reports.

 

Contact Gangsteel Today

Need S275M plates with verified chemical composition? Contact us now for best price and fastest delivery.

Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/

Gangsteel – Real Factory. Real Stock. Real Chemical Control.

 

 

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