Domestic S355J2 structural round steel, ideal for load-bearing components and low-temperature working environments

When picking structural steel bars for engineering use, sufficient strength alone is never enough. The material must stay stable and dependable while bearing alternating loads and operating in frigid surroundings. Our S355J2 steel bars deliver outstanding yield strength and pass impact resistance tests at minus 20°C, making them a top choice for bridge frames, building steel frameworks, large machinery and general construction works.

We are a local manufacturer supplying S355J2 structural steel bars in hot rolled and forged forms. Every batch can be fully traced from raw material to finished goods. We offer custom length cutting services and can issue EN 10204 3.1 factory test reports to support overseas export orders.

Supply Specifications

Item	Details
Steel Grade	S355J2
Standard	EN 10025-2
Shape	Round Bar, Square Bar, Flat Bar
Diameter	10–500 mm
Length	3–12 m or Customized
Surface	Black, Peeled, Turned, Bright
Processing	Cutting, CNC Machining, UT Testing

Item

Value

≤0.20%

≤0.55%

≤1.60%

≤0.025%

≤0.012%

Yield Strength

≥355 MPa

Tensile Strength

470–630 MPa

Elongation

≥22%

Typical Applications

S355J2 Structural Steel Bar is commonly used for:

Bridge components
Construction and building structures
Mining and lifting equipment
Heavy machinery shafts
Wind power structures
Steel fabrication projects

Key Features of S355J2 Structural Steel Bar

Guaranteed Low-Temperature Toughness

The "J2" designation means the steel achieves 27 J minimum Charpy V-notch impact energy at -20°C, making it suitable for outdoor structures and cold-service environments where ordinary structural steels may become brittle.

Higher Yield Strength

Compared with S235 structural steel, S355J2 provides a minimum yield strength of 355 MPa, allowing engineers to reduce section size or component weight while maintaining structural performance.

Good Weldability

Its controlled carbon equivalent helps simplify welding during fabrication, reducing the need for complex preheating under normal structural applications and improving manufacturing efficiency.

Suitable for Machining

S355J2 bars are commonly supplied for machining into pins, shafts, connection plates and structural components, offering stable dimensional accuracy after processing.