Here is a detailed introduction to E295, E335, and E360 high-strength low-alloy steel plates, including their standards, mechanical properties, chemical compositions, and applications:

1. Standards and Grades

These grades belong to European non-alloy and alloy structural steel standards (e.g., EN 10025 series, but note that modern standards may have been revised or replaced, such as EN 10025-3 for high-strength low-alloy steels).

 

E denotes "Engineering steel" (structural steel for general engineering purposes).

The number (e.g., 295, 335, 360) represents the minimum yield strength (MPa) for thick plates under specified conditions.

2. Mechanical Properties

(Typical values for reference; actual values may vary by standard and thickness)

 

Grade	Yield Strength (ReH, MPa) (Thickness ≤ 16 mm)	Tensile Strength (Rm, MPa)	Elongation (A, %) (Thickness ≤ 16 mm)	Impact Test Temperature & Energy
E295	≥ 295	430–560	≥ 21	Usually at +20°C (non-impact grade)
E335	≥ 335	490–630	≥ 19	May include low-temperature impact (e.g., -20°C)
E360	≥ 360	510–650	≥ 19	May include low-temperature impact (e.g., -20°C or -40°C)

 

Key Notes:

Yield strength decreases slightly with increasing thickness (e.g., for E360, yield strength may drop to ≥ 345 MPa for 16–40 mm thickness).

Impact resistance (Charpy V-notch test) is optional for basic grades but required for higher performance applications (check the specific standard for details).

 

 

 

 

 

 

 

 

3. Chemical Compositions

(Typical ranges; exact values depend on the standard and manufacturer)

 

Grade	C (%)	Si (%)	Mn (%)	P (%) ≤	S (%) ≤	Alloy Additives (e.g., Nb, V, Ti)
E295	≤ 0.20	≤ 0.55	0.90–1.65	0.035	0.035	Minimal or none (near-carbon steel)
E335	≤ 0.20	≤ 0.55	1.00–1.70	0.030	0.030	May include small Nb, V, or Ti for strength
E360	≤ 0.20	≤ 0.60	1.00–1.70	0.025	0.025	More alloying elements (e.g., Nb, V, Ti) to improve strength and toughness

 

 

Alloying Purpose: Elements like Nb (niobium), V (vanadium), and Ti (titanium) are used to refine the grain structure and enhance strength without significantly increasing carbon content (improving weldability).

 

 

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