Mild Steel S355J2

Mild Steel S355J2 is a low-carbon structural steel with excellent weldability and machinability.

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Machined mild steel S355J2 gear and housing assembly on dark surface

1.0577
1522H
Fe 510 D

450-580 MPa

Ultimate Tensile Strength
265-340 MPa

Yield Strength
217 GPa

Young's Modulus(Elasticity)
14-20 %

Elongation at Break

At a Glance

Material Type
Metal
Material Name
Mild Steel S355J2
Alternative Names
1.0577 | 1522H | Fe 510 D
Process Compatibility
CNC Milling, CNC Turning

Properties Table of Mild Steel S355J2

Properties

Ultimate Tensile Strength 450-580 MPa
Yield Strength 265-340 MPa
Young's Modulus(Elasticity) 217 GPa
Elongation at Break 14-20%
Physical Properties
Corrosion Resistance Moderate corrosion resistance
Magnetism Generally magnetic
UV Resistance Limited UV resistance
Weldability Good weldability with proper procedures
Thermal Properties
Maximum Service Temperature Approximately 500°C(932°F)
Thermal Expansion Coefficient 10.8 x 10^-6/°C(20-100°C)
Thermal Conductivity 50.9 W/m·K(20°C)

Applications of Mild Steel S355J2

Structural components in buildings and bridges
Offshore platforms and structures
Shipbuilding, including hulls and components
Industrial machinery and equipment
Transmission towers and poles
Railway rolling stock components
Construction of storage tanks and containers
General fabrication and welding applications

Advantages of Mild Steel S355J2

High Strength which is perfect for structural applications
Good Weldability
Durability
Versatility
Moderate Corrosion Resistance
Cost-effective compared to other high-strength materials
Impact Resistance
Ease of Machining

Raw Stock

CNC Machined

Finished Parts

Mild Steel S355J2 — Machining Notes

Mild Steel S355J2 in CNC
is Mild Steel S355J2?

Mild Steel S355J2 in CNC Machining

Mild Steel S355J2 is a low-carbon structural steel with excellent weldability and machinability.

In CNC machining, S355J2 is often used for components requiring precision and moderate to high mechanical performance. CNC machining processes, including milling and turning, can be efficiently applied to shape and create intricate details in components made from S355J2 steel. We consider cutting speeds, feeds, and tool selection to optimize machining performance.

The composition of S355J2 typically includes elements such as carbon, manganese, silicon, and trace amounts of other alloying elements. S355J2 Steel is used for structures facing heavy loads because of its exceptional strength. Its durability is good for earthquake-resistant constructions and high-speed railways. The steel’s resilience in low temperatures benefits aerospace, outdoor construction, and offshore operations.

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What is Mild Steel S355J2?

S355J2 is a versatile steel with medium tensile strength, low carbon, and good weldability. It exhibits excellent impact resistance, even in sub-zero temperatures, and is often supplied in untreated or normalized conditions.

It has moderate corrosion resistance, so it may need extra protection like galvanization or specialized coatings, especially in wet or corrosive environments.

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FAQ

What is the difference between S355JR and S355J2?

S355JR and S355J2 are both grades of structural steel. The main difference lies in their impact energy values; S355J2 has higher impact energy at -20°C.

What does S355J2 mean?

"S" signifies "structural steel," and 355 indicates the minimum yield strength for steel thickness up to 16 mm. "J2" denotes a minimum impact energy of 27 J at -4°F.

Does S355 steel rust?

S355 steel, including S355JR and S355J2, has moderate corrosion resistance, but it can rust. Exposure to environmental conditions may lead to rusting over time.