ASTM A572 Grade 50 Steel Equivalent, Gr 65, 60 Properties, Tensile Yield Strength

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ASTM A572 Grade 50 Steel

ASTM A572 grade 50 steel is a low-alloy high-strength structural steel with a yield strength of 50 ksi (345 MPa) and a tensile strength of 65 ksi (450 MPa). It has better mechanical properties than ASTM A36 steel. ASTM A572 contains 5 yield point grades: Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. Products cover structural steel shapes, plates, sheet piling, and bars. ASTM A572 GR 50 steel equivalent European standard is EN 10025-2 S355 steel.

ASTM A572 Grade 50 Properties & Specification

The following tables show ASTM A572 Grade 50 properties, as well as the specifications of Grade 65, Grade 60, etc. including chemical composition, mechanical properties and equivalent grade.

Chemical Composition

The following datasheet gives the chemical composition in based on heat analysis.

Chemical Composition (Heat Analysis), %
Standard Grades C, ≤ Mn, ≤ P, ≤ S, ≤ Si Diameter, Thickness, or Distance Between Parallel Faces, (d) in (mm) Plates and Bars Structural Shape Flange or Leg Thickness, in (mm)
Plates ≤ 1.5 in (40mm) thick,
Shapes with flange or leg thickness ≤ 3 in (75 mm), sheet piling, bars, zees, and rolled tees
Plates > 1.5 in (40 mm) thick and shapes with flange thickness > 3 in (75 mm)
ASTM A572/A572M Grade 42 [290] 0.21 1.35 0.03 1.03 0.40 0.15-0.40 6 (150) all
Grade 50 [345] 0.23 1.35 4 (100) all
Grade 55 [380] 0.25 1.35 2 (50) all
Grade 60 [415] 0.26 1.35 1.25 (32) ≤2 (50)
Grade 65 [450] 0.23 1.65 0.5< d≤1.25 (13-32) 0.5< d≤2 (25-50)
0.26 1.35 ≤0.5 (13) ≤1 (25)
Alloy Content, Heat Analysis
Standard Type Elements Heat analysis, % Product analysis, %
ASTM A572/A572M 1 Nb (Columbium) 0.005-0.05 0.004-0.06
2 V (Vanadium) 0.01-0.15 0.005-0.17
3 Nb 0.005-0.05 0.004-0.06
V 0.01-0.15 0.005-0.17
Nb+V 0.02-0.15 0.01-0.16
5 Ti (Titanium) 0.006-0.04
N (Nitrogen) 0.003-0.015
V 0.06, ≤
Maximum Product Thickness or Size
Standard Grades Yield Point, ksi (MPa) ≥ Thickness or Size, Plates and Bars, in (mm) ≤ Structural Shape Flange or Leg Thickness, Sheet Piling Zees and Rolled Tees
ASTM A572/A572M Grade 42 [290] 42 (290) 6 (150) all all all
Grade 50 [345] 50 (345) 4 (100) all all all
Grade 55 [380] 55 (380) 2 (50) all all all
Grade 60 [415] 60 (415) 1.25 (32) 2 (50) all all
Grade 65 [450] 65 (450) 1.25 (32) 2 (50) not available all

ASTM A572 Steel Mechanical Properties

The table below lists ASTM A572 Grade 50 mechanical properties such as modulus of elasticity (Young’s modulus), shear modulus, ultimate tensile strength, yield strength, Brinell hardness, etc.

Mechanical Properties
Standard Grades Yield Strength, ksi (MPa), ≥ Tensile Strength, ksi (MPa), ≥ Elongation, %, ≥
8 in (200 mm) 2 in (50 mm)
ASTM A572/A572M Grade 42 [290] 42 (290) 60 (415) 20 24
Grade 50 [345] 50 (345) 65 (450) 18 21
Grade 55 [380] 55 (380) 70 (485) 17 20
Grade 60 [415] 60 (415) 75 (520) 16 18
Grade 65 [450] 65 (450) 80 (550) 15 17

Physical Properties

A572 GR 50 steel physical properties are given in the lists below:

Physical Properties (A572 GR 50)
Density, g/cm3 (lb/in3) 7,83 (0.283)
Modulus of elasticity (Elastic Modulus), GPa (103 ksi) 207 (30)
Shear Modulus, GPa (103 ksi) 80 (11.6)
Bulk Modulus, GPa (103 ksi) 160 (23.2)
Poisson’s Ratio 0.3

A572 Material Applications

A572 material widely used in engineering structures, construction steel structures, construction machinery, mining and mountain machinery, trucks, bridges, pressure vessels, etc., especially for construction and engineering machinery components that require good weldability and toughness. For example, riveted or bolted structures or welded structures for bridges and other applications.

ASTM A572 Grade 50 Equivalent Material

ASTM A572 grade 50 equivalent to European EN standard (German DIN, British BSI, French NF…), ISO, Japanese JIS and Chinese GB standard. (For reference)

ASTM A572 Equivalent Grade
US European Union Germany Japan Chinese Indian ISO
Standard Grades Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade
ASTM A572/A572M Grade 50 [345] EN 10025-2;
EN 10025:1993
S355JR (1.0045) DIN EN 10025-2;
EN 10025:1993
DIN 17100
S355JR (1.0045);
St 52-3
JIS G3135 SPFC590 GB/T 1591 Q345, Q355 IS 2062 E350 ISO 630-2 S355
Grade 42 [290] S275 St 44 S275
Grade 55 [380] Q390
Grade 60 [415] Q420 E410
Grade 65 [450] S460 Q460 E450 S450

Related material: SS400 Steel, AISI 304 Stainless Steel, SS 304

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