What is the difference between ASTM A36 and ASTM A572 Grade 50?
A36 Steel
ASTM A36 hot rolled steel is a structural quality mild carbon steel. It provides enhanced strength, formability, and excellent welding properties, which make it suitable for complex applications that require welding, fabricating, and bending.
ASTM A572
The ASTM A572 specification is the Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel for used in general construction and structural applications. ASTM A572 includes five grades with specified minimum yield strengths of 42, 50, 55, 60, and 65 ksi, respectively. ASTM A572 grades are used in a wide variety of structural applications in many market segments.
Chemical Composition of ASTM A36 Steel
|
CHEMICAL ALLOY |
UP TO ¾” THICK |
OVER ¾” TO 1 ½” THICK |
OVER 1 ½” TO 2 ½” THICK |
OVER 2 ½” TO 4” THICK |
OVER 4” THICK |
|
CARBON MAX |
0.25% |
0.25% |
0.26% |
0.27% |
0.29% |
|
MANGANESE |
N/A |
0.80-1.20% |
0.80-1.20% |
0.85-1.20% |
0.85-1.20% |
|
PHOSPHORUS MAX |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
|
SULFUR MAX |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
|
SILICON |
0.40% MAX |
0.40% MAX |
0.15-0.40% |
0.15-0.40% |
0.15-0.40% |
|
COPPER MIN |
0.20% |
0.20 % |
0.20% |
0.20% |
0.20% |
Chemical Composition of ASTM A572 Steel
|
CHEMICAL ALLOY |
GRADE 42 |
GRADE 50 |
GRADE 55 |
GRADE 60 |
GRADE 65 ≥ ½” THICK |
GRADE 65 OVER ½” TO 1 ¼” THICK |
|
CARBON MAX |
0.21% |
0.23% |
0.25% |
0.26% |
0.26% |
0.23% |
|
MANGANESE MAX |
1.35% |
1.35% |
1.35% |
1.35% |
1.35% |
1.65% |
|
PHOSPHORUS MAX |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
|
SULFUR MAX |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
0.030% |
|
SILICON |
0.15-0.40% |
0.15-0.40% |
0.15-0.40% |
0.40% |
0.40% |
0.40% |
Due to differences in the chemical compositions of A36 and A572 steel, these materials differ in their mechanical properties, including yield point, which measures the point at which a material permanently changes shape after experiencing great forces, and tensile strength, which measures the force needed to cause material breakage or failure.
The higher presence of strengthening alloys, such as manganese and silicon, in A572 plate grades give the material greater strength as compared to A36. This higher strength allows A572 steel to bear more weight and withstand greater forces without breaking or failing, which is crucial in structural applications.
Mechanical Properties of ASTM A36 & ASTM A572 Steel Plate
|
GRADE |
YIELD POINT |
TENSILE STRENGTH |
|
A36 |
36 KSI |
58-80 KSI |
|
A572 GRADE 42 |
42 KSI |
60 KSI |
|
A572 GRADE 50 |
50 KSI |
65 KSI |
|
A572 GRADE 55 |
55 KSI |
70 KSI |
|
A572 GRADE 60 |
60 KSI |
75 KSI |
|
A572 GRADE 65 |
65 KSI |
80 KSI |
ASTM A36 Carbon Steel Advantages
ASTM A36 carbon steel benefits include:
A36 Carbon Steel Applications
Whether cold bending, machining, punching, welding, or mild hot forming, A36 HR steel shapes provide a wide range of beneficial features for your industrial application needs. Some of the direct applications where carbon ASTM A36 is used include:A572 Grade 50 Steel Advantages
A572 Grade 50 Steel Applications
BBN Steel is your trusted source for high-quality A36 carbon steel and A572 Grade steel. No matter what your project requires, we can provide you with high-quality A36 carbon steel and A572 Grade steel based on your project’s exact specifications. For direct A36 carbon steel and A572 Grade steel pricing, Request a Quote today, and we will gladly discuss your ASTM A36 steel and A572 Grade steel project requirements.
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