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 grades of yield strength: Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. Products cover structural steel profiles, plates, sheet pilings and bars. The European standard equivalent to ASTM A572 GR 50 steel is EN 10025-2 S355 steel.
ASTM A572 Grade 50 Properties and Specifications
The following tables show the 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 data sheet provides the chemical composition based on heat analysis.
| Chemical Composition (Heat Analysis), % | |||||||||
| Standard | Grades | C, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Yes | Diameter, thickness or distance between parallel faces, (d) in (mm) Plates and bars | Structural shape flange or leg thickness, in (mm) | |
| Boards ≤ 1.5 in. (40 mm) thick, Forms with flange or leg thickness ≤ 3 in. (75 mm), sheet piles, bars, zees and rolled tees |
Boards > 1.5 in. (40 mm) thick and shapes with flange thickness > 3 in. (75mm) | ||||||||
| ASTM A572/A572M | 42nd series [290] | 0.21 | 1.35 | 0.03 | 1.03 | 0.40 | 0.15-0.40 | 6 (150) | all |
| 50th series [345] | 0.23 | 1.35 | 4 (100) | all | |||||
| 55th series [380] | 0.25 | 1.35 | 2 (50) | all | |||||
| 60th series [415] | 0.26 | 1.35 | 1.25 (32) | ≤2 (50) | |||||
| 65th series [450] | 0.23 | 1.65 | 0.5 |
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 (Columbia) | 0.005-0.05 | 0.004-0.06 |
| two | V (vanadium) | 0.01-0.15 | 0.005-0.17 | |
| 3 | No. | 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 | |||||
| Grades | Yield point, ksi (MPa) ≥ | Thickness or Size, Plates and Bars, in (mm) ≤ | Structural shape flange or leg thickness, | sheet piling | Zees and rolled up t-shirts |
| 42nd series [290] | 42 (290) | 6 (150) | all | all | all |
| 50th series [345] | 50 (345) | 4 (100) | all | all | all |
| 55th series [380] | 55 (380) | 2 (50) | all | all | all |
| 60th series [415] | 60 (415) | 1.25 (32) | 2 (50) | all | all |
| 65th series [450] | 65 (450) | 1.25 (32) | 2 (50) | not available | all |
Mechanical Properties of ASTM A572 Steel
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 | ||||
| Grades | Yield strength, ksi (MPa), ≥ | Tensile strength, ksi (MPa), ≥ | Elongation, %, ≥ | |
| 8 in. (200mm) | 2 in. (50mm) | |||
| 42nd series [290] | 42 (290) | 60 (415) | 20 | 24 |
| 50th series [345] | 50 (345) | 65 (450) | 18 | 21 |
| 55th series [380] | 55 (380) | 70 (485) | 17 | 20 |
| 60th series [415] | 60 (415) | 75 (520) | 16 | 18 |
| 65th series [450] | 65 (450) | 80 (550) | 15 | 17 |
Physical properties
The physical properties of A572 GR 50 steel 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 is 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 resistance. For example, riveted or bolted structures or welded structures for bridges and other applications.
Equivalent Material ASTM A572 Grade 50
ASTM A572 grade 50 equivalent to European EN standard (German DIN, British BSI, French NF…), ISO, Japanese JIS Standard and Chinese GB. (For reference)
| Equivalent Grade ASTM A572 | |||||||||||||
| USA | European Union | Germany | Japan | Chinese | Indian | ISO | |||||||
| Standard | Grades | Standard | Note | Standard | Note | Standard | Note | Standard | Note | Standard | Note | Standard | Note |
| ASTM A572/A572M | 50th series [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 | It's 2062 | E350 | ISO 630-2 | S355 |
| 42nd series [290] | S275 | Saint 44 | S275 | ||||||||||
| 55th series [380] | Q390 | ||||||||||||
| 60th series [415] | Q420 | E410 | |||||||||||
| 65th series [450] | S460 | Q460 | E450 | S450 | |||||||||
Related Material: SS400 Steel, AISI 304 Stainless Steel, SS 304
1 comment
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