ASTM A573 Grade 70 is categorized as Carbon Steel. It is composed of (in weight percentage) 0.28% Carbon (C), 0.85-1.20% Manganese (Mn), 0.04%(max) Phosphorus (P), 0.05%(max) Sulfur (S), 0.15-0.30% Silicon (Si), and the base metal Iron (Fe). Another common designation of ASTM A573 Grade 70 carbon steel is UNS K02701.
Steel is the common name for a large family of iron alloys. Steels can either be cast directly to shape, or into ingots that are reheated and hot-worked into a wrought shape by forging, extrusion, rolling, or other processes. Wrought steels are the most common engineering material used, and come in a variety of forms with different finishes and properties. Carbon steel alloying elements do not exceed these limits: 1% carbon, 0.6% copper, 1.65% manganese, 0.4% phosphorus, 0.6% silicon, and 0.05% sulfur.
The typical elastic modulus of carbon steels at room temperature (25°C) ranges from 190 to 210 GPa. The typical density of carbon steels is about 7.85 g/cm3. The typical tensile strength varies between 276 and 1882 MPa. The wide range of ultimate tensile strength is largely due to different heat treatment conditions.
Category | Steel |
Class | Carbon steel |
Designations | United States: UNS K02701 |
Element | Weight % |
C | 0.28 |
Mn | 0.85-1.20 |
P | 0.04 (max) |
S | 0.05 (max) |
Si | 0.15-0.30 |
| |
Properties | Conditions |
T (°C) | Treatment |
Density (×1000 kg/m3) | 7.7-8.03 | 25 | |
Poisson's Ratio | 0.27-0.30 | 25 | |
Elastic Modulus (GPa) | 190-210 | 25 | |
Tensile Strength (Mpa) | 485-620 | 25 | |
Yield Strength (Mpa) | 290 |
Elongation (%) | 18, 8 |
Reduction in Area (%) | |
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