A572 Gr.60 vs A572 Gr.50
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
A572 Gr.60
Structural & HSLA Steel
ASTM A572 Grade 60 is the 60 ksi member of the standard American HSLA structural family. It slots between Gr.50 and Gr.65 for columns and heavy sections where A572-50 designs get bulky but a full 65 ksi design is unnecessary.
Standards: DIN S420 class (near) · AISI A572 Gr.60 · JIS SM570 (near) · GB Q420 class (near)
A572 Gr.50
Structural & HSLA Steel
ASTM A572 Grade 50 is the standard American HSLA structural steel — the 50 ksi yield grade that replaced A36 in most US bridge and heavy construction work. Strength comes from Nb/V microalloying and grain refinement rather than carbon, so weldability remains good.
Standards: DIN S355J2 (near) · AISI A572 Gr.50 · JIS SM520B (near) · GB Q355B (near)
Chemical composition compared (%)
| Element | A572 Gr.60 | A572 Gr.50 |
|---|---|---|
| C | ≤0.26 | ≤0.23 |
| Si | ≤0.40 | ≤0.40 |
| Mn | ≤1.35 | ≤1.35 |
| P | ≤0.035 | ≤0.035 |
| S | ≤0.045 | ≤0.045 |
| Note | Nb/V microalloy type per ASTM A572 | — |
| V | — | 0.01–0.15 (Type 2) |
Properties compared
| Property | A572 Gr.60 | A572 Gr.50 |
|---|---|---|
| Yield strength | ≥415 MPa (60 ksi) | ≥345 MPa |
| Tensile strength | ≥520 MPa (75 ksi) | ≥450 MPa |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: A572 Gr.60 · A572 Gr.50. Substitution decisions for certified parts stay with the design authority.