ASTM A615 Grade 40 Rebar vs ASTM A615 Grade 60 Rebar
Property comparison of ASTM A615 Grade 40 Rebar and ASTM A615 Grade 60 Rebar, both carbon steel.
| Property | ASTM A615 Grade 40 Rebar | ASTM A615 Grade 60 Rebar | Difference |
|---|---|---|---|
| Yield strength | 276 MPa | 414 MPa | +50% |
| Tensile strength | 414 MPa | 552 MPa | +33% |
| Elongation | 11 % | 9 % | -18% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Shear modulus | 76,923 MPa | 76,923 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,850 kg/m³ | 0% |
| Thermal conductivity | 61.6 W/m·K | 61.6 W/m·K | 0% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000012 1/K | 0% |
| Melting point | 1,480 °C | 1,480 °C | 0% |
Difference is ASTM A615 Grade 60 Rebar relative to ASTM A615 Grade 40 Rebar. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- 40
- standard
- ASTM
- grade
- 60
- standard
- ASTM
About ASTM A615 reinforcing bar
A615 is the standard carbon steel rebar specification. Grade 60 (60 ksi yield) is the most common for buildings and bridges in the US; Grade 75 and Grade 80 are used where higher strength reduces congestion in heavily reinforced members.
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