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ASTM A573 Steel, grade 70

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.

ASTM A573 Grade 70

Category Steel
Class Carbon steel
Designations United States: UNS K02701
Composition

ElementWeight %
C 0.28
Mn 0.85-1.20
P 0.04 (max)
S 0.05 (max)
Si 0.15-0.30
Mechanical Properties

PropertiesConditions
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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