S275M Steel Bar EN 10025-4 Structural Supplier

 

 

S275M Steel Bar EN 10025-4 Structural Supplier

Gangsteel – China’s Leading Mill-Direct Supplier & Exporter of S275M Steel Bar EN 10025-4 Structural Material

Gangsteel specializes in supplying S275M steel bar EN 10025-4 structural material, offering round, flat, and square bars in diameters/sizes from 10 mm to 400 mm (round) and equivalent sections. While EN 10025-4 primarily specifies plates, Gangsteel produces S275M bars through controlled rolling and TMCP-equivalent processes to meet the same fine-grain structural requirements. We maintain over 2,000 tons of S275M bar stock, complemented by our massive plate inventory in the en 10025 4 High Strength Structural Steel series.

All S275M bars are produced with full traceability, EN 10204-3.1/3.2 certificates, and third-party inspection (DNV-GL, ABS, LR, BV, CCS, KR, TÜV, SGS). Z-quality and enhanced toughness options available on request.

Immediate delivery worldwide in 3–7 days. Full processing: saw cutting, turning, peeling, heat treatment.

We also stock related grades including en 10025 4 s275ml steel plate, en 10025 4 s275m steel plate, en 10025 4 s355m steel plate, en 10025 4 s355ml steel plate, en 10025 4 s420ml steel plate, en 10025 4 s460m steel plate, and en 10025 4 s460ml steel plate.

 

What is S275M Steel Bar EN 10025-4 Structural?

S275M steel bar follows the same material specification as EN 10025-4 S275M plate – a thermomechanically rolled (TMCP) weldable fine-grain structural steel with:

• Minimum yield strength 275 MPa
• Excellent toughness ≥40 J at –20 °C
• Very low CEV ≤0.38 → outstanding weldability

The designation “S275M” means:

• S= structural steel
• 275= minimum yield strength 275 MPa
• M= thermomechanical rolling (TMCP delivery condition)

S275M bars are produced using TMCP-equivalent processes to achieve the same fine-grain structure as plates, making them suitable for structural applications requiring machined or forged components with guaranteed properties.

S275M is the entry-level high-strength grade in the EN 10025-4 family, ideal for cost-effective structural designs where service temperature is above –20 °C.

 

Chemical Composition – Ladle Analysis (max % unless noted)

Element	C	Si	Mn	P	S	Nb	V	Al min	Ti	Cr	Ni	Mo	Cu	N	CEV max
S275M	0.14	0.50	1.50	0.030	0.025	0.05	0.10	0.020	0.05	0.30	0.30	0.10	0.55	0.015	0.38

Typical Gangsteel actual values: C 0.09–0.12 %, CEV 0.32–0.36 → excellent weldability without preheating up to 100 mm equivalent section.

 

Mechanical Properties – Typical for Round Bars (as-rolled/TMCP condition)

Diameter/Size (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 ≤ 100	245	370–530	24	40
>100 ≤ 160	235	370–530	24	40
>160 ≤ 250	225	360–520	24	40

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

 

Available Bar Forms & Specifications

• Round bars: 10–400 mm diameter
• Flat bars: thickness 8–100 mm, width 40–800 mm
• Square bars: 20–300 mm
• Forged bars: up to 800 mm (on request)
• Surface: black, turned, peeled, ground
• Length: 3–12 m standard, fixed lengths on request
• Certification: EN 10204-3.1/3.2, PED, all major class approvals

 

Applications of S275M Steel Bars

S275M bars are used when machined or forged structural components are required:

• Shafts and axles for machinery
• Structural pins and bolts
• Crane components
• Wind turbine tower flanges
• Bridge connection elements

For low-temperature applications below –20 °C, use S275ML equivalent bars.

 

Why Choose Gangsteel for S275M Steel Bars

• Largest S275M bar stock in Asia (2,000+ tons ready)
• Factory-direct price – 60–120 USD/ton lower than traders
• Full processing capability (sawing, turning, peeling, heat treatment)
• Custom sizes and fixed lengths available
• Immediate delivery worldwide
• Exported to 90+ countries with perfect documentation
• One-stop service – stock → processing → shipping

 

Summary

S275M EN 10025-4 steel bars from Gangsteel offer 275 MPa yield strength, –20 °C toughness, and TMCP fine-grain structure in round, flat, and square sections for machined structural components. With stock in 10–400 mm, full certification, and fast delivery, S275M bars provide cost-effective high-strength solutions for machinery, cranes, and onshore structures.

 

FAQ – Detailed Answers

Q1: What is the difference between S275M and S275ML bars?

A: The only difference is the impact test temperature. S275M is tested at –20 °C with minimum 40 J (longitudinal), while S275ML is tested at –50 °C with minimum 27 J. Yield strength, tensile strength, elongation, chemical composition, and weldability are exactly the same. Choose S275M when service temperature is above –20 °C; choose S275ML when below –20 °C.

Q2: Is preheating required when welding S275M bars?

A: No preheating is required up to 100 mm equivalent section thanks to the very low CEV (typically 0.32–0.36 actual). For larger sections or highly restrained joints, a modest preheat of 75–100 °C is sufficient.

Q3: Do you have Z35 quality in stock for S275M bars?

A: Yes – we keep stock of S275M + Z35 bars (reduction of area ≥35 % per EN 10164 Class 3), especially in 20–150 mm diameter, ready for immediate delivery.

Q4: What is the density and hardness of S275M bars?

A: Density is 7.85 g/cm³ (7850 kg/m³), hardness is 130–170 HBW (typical 140–160 HBW in our stock). These values are consistent across the entire size range.

Q5: What surface finishes do you offer for S275M bars?

A: Black (as-rolled), turned, peeled, ground, and polished finishes are available. Shot-blasted + primer option for corrosion protection.

Q6: What is the maximum diameter you can supply for S275M round bars?

A: Up to 400 mm round and equivalent sections, with full properties and certification. Larger sizes available as forged bars on request.

Q7: How fast can you deliver to Europe or USA?

A: From ready stock: 7–12 days to Rotterdam, Antwerp, Houston, or Los Angeles. We have regular consolidation containers and can offer air freight for urgent small quantities (<10 tons) in 48–72 hours.

Contact Gangsteel Today

Need S275M structural bars? 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 Fast Delivery.

 

Other technical date for EN 10025-4 S275M STEEL PLATE