S355ML Equivalent India IS2062 E350 EN 10025-4 Supplier

S355ML Equivalent India IS 2062 E350 | EN 10025-4 Steel Plate

Overview of S355ML vs IS 2062 E350

S355ML, defined in EN 10025-4, is a thermomechanically rolled, high-strength structural steel known for:

• 355 MPa minimum yield strength
• Excellent toughness at low temperatures (–50°C)
• Very good weldability due to low CE

It is widely used in offshore engineering, bridges, heavy machinery, and low-temperature structures.

In the Indian standard IS 2062, the closest equivalent strength grade is E350, a structural steel with a similar yield strength level. However, E350 does not include mandatory low-temperature toughness requirements, so it is only a partial equivalent to S355ML.

Chemical Composition Comparison (S355ML vs IS 2062 E350)

Element (%)	S355ML (EN 10025-4)	IS 2062 E350
C	≤ 0.16	≤ 0.20
Mn	1.00–1.70	≤ 1.50
Si	≤ 0.60	≤ 0.45
P	≤ 0.025	≤ 0.040
S	≤ 0.020	≤ 0.045
Nb / V / Ti	Allowed (TMCP micro-alloying)	Not required
CE (IIW)	≤ 0.43	≈ 0.45

Key Conclusion:

• S355ML has stricter chemistry controls, especially P and S.
• TMCP micro-alloying in S355ML gives better weldability and toughness.
• IS 2062 E350 is more general-purpose, without enforced low-temperature properties.

Mechanical Properties Comparison

Property	S355ML (EN 10025-4)	IS 2062 E350
Yield Strength (ReH)	355 MPa (≤16mm)	350 MPa (typical)
Tensile Strength (Rm)	470–630 MPa	490–610 MPa
Elongation	≥ 22%	≥ 20%
Impact Energy	27J at –50°C	Not required (optional)
Delivery Condition	TMCP	As Rolled / Normalized

Mechanical Summary:

• Strength levels are similar.
• S355ML performs much better at –20°C / –40°C / –50°C.
• IS 2062 E350 is suitable for normal ambient conditions only.

 

Are S355ML and IS 2062 E350 Interchangeable?

Partially interchangeable, depending on the service conditions.

✔When Equivalent

Use IS 2062 E350 instead of S355ML if:

• The project is not in a low-temperature environment
• Toughness requirements are moderate
• Strength level ~350 MPa is applicable

✘Not Equivalent

Do NOT substitute IS 2062 E350 for S355ML when:

• –20°C / –40°C / –50°C impact tests are required
• Offshore structures
• High-altitude or cold regions
• Low-temperature machinery
• Cryogenic or LNG-related structures

In these cases, only S355ML is correct.

 

Others relative propery of en 10025-4 S355ML