ASTM A500 Grade A HSS Round Tubing vs ASTM A500 Grade D HSS Tubing
Property comparison of ASTM A500 Grade A HSS Round Tubing and ASTM A500 Grade D HSS Tubing, both carbon steel.
| Property | ASTM A500 Grade A HSS Round Tubing | ASTM A500 Grade D HSS Tubing | Difference |
|---|---|---|---|
| Yield strength | 228 MPa | 250 MPa | +10% |
| Tensile strength | 310 MPa | 400 MPa | +29% |
| Elongation | 25 % | 23 % | -8% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Shear modulus | 77,200 MPa | 77,200 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,850 kg/m³ | 0% |
| Thermal conductivity | 64.3 W/m·K | 64.3 W/m·K | 0% |
| Specific heat | 458 J/kg·K | 458 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 A500 Grade D HSS Tubing relative to ASTM A500 Grade A HSS Round Tubing. 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
- A
- standard
- ASTM
- heat treatment
- —
- grade
- D
- standard
- ASTM
- heat treatment
- stress_relieved
About ASTM A500 cold-formed HSS
A500 covers cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. Grade B is the most common for general HSS work; Grade C provides higher yield (50 ksi) and is becoming the standard call-out in steel design.
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