Grade 33, specifically referring to ASTM A570 Grade 33 steel, has a minimum yield tensile strength of 33,400 psi.
Understanding Grade 33 Steel
When discussing "grade 33" in materials science, it commonly refers to the minimum yield strength requirement for certain types of steel. In this context, it pertains to ASTM A570 Steel, Grade 33, a standard specification for hot-rolled carbon steel sheet and strip. The "33" in its designation signifies a minimum yield strength of 33,000 psi.
Yield strength is a critical mechanical property that indicates the maximum stress a material can withstand before it begins to deform permanently. Beyond this point, the material will not return to its original shape once the load is removed.
Key Properties of ASTM A570 Grade 33 Steel
Here's a breakdown of some fundamental mechanical properties for ASTM A570 Grade 33 steel, highlighting its yield strength:
Property | Metric Value | English Value |
---|---|---|
Tensile Strength, Yield | 230 MPa | 33,400 psi |
Elongation at Break | 16 - 18 % | 16 - 18 % |
Bulk Modulus | 160 GPa | 23,200 ksi |
These properties make Grade 33 steel suitable for a variety of general structural applications where moderate strength and good formability are required. Its consistent yield strength ensures predictable performance under typical service conditions.