ASTM A573/A573M Grade 58 Structural Carbon Steel Coil
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil - High Toughness & Weldability
Explore ASTM A573/A573M Grade 58 carbon steel coil with minimum 400 MPa tensile strength, excellent notch toughness, and reliable weldability for structural applications.
Hot rolling, cold forming, cutting, welding, machining, bending, punching
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ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Introduction
ASTM A573/A573M Grade 58 is a hot-rolled structural carbon steel with improved toughness, intended for welded, bolted, or riveted construction. As a low‑alloy high‑strength steel coil, it offers a minimum yield point of 32 ksi (220 MPa) and tensile strength between 58–71 ksi (400–490 MPa). The composition is carefully controlled to ensure good weldability and reliable performance in moderate stress and low‑temperature service. Typical applications include bridges, storage tanks, building frameworks, and heavy‑duty machinery where notch toughness is required. The material is supplied in the as‑rolled or normalized condition, allowing subsequent cold forming, machining, and welding without excessive hardness or cracking.
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Chemical Composition
Chemical requirements according to ASTM A573/A573M for Grade 58 (heat analysis). Elements are controlled to achieve the required tensile strength and notch toughness while preserving weldability.
| Chemical Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.23 % | Max. |
| Manganese (Mn) | 0.60 – 0.90 % | Ladle analysis range |
| Phosphorus (P) | ≤ 0.035 % | Max. |
| Sulfur (S) | ≤ 0.040 % | Max. |
| Silicon (Si) | 0.15 – 0.40 % | Typical range |
| Copper (Cu)* | ≥ 0.20 % | Minimum when copper is specified |
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Thermal & Electrical Physical Properties
Typical physical properties for medium‑carbon structural steels (non‑standardised, general references). Actual values may vary slightly with processing and exact composition.
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | Room temperature, typical for carbon steel |
| Elastic Modulus (E) | 200 – 210 | GPa | At ambient temperature |
| Shear Modulus (G) | ~80 | GPa | Estimated from E and ν |
| Poisson's Ratio (ν) | 0.27 – 0.30 | – | Elastic range |
| Thermal Expansion (α) | 11.7 – 12.1 | ×10⁻⁶/°C | From 20 °C to 100 °C |
| Thermal Conductivity (λ) | 48 – 54 | W/(m·K) | At 0–100 °C |
| Specific Heat Capacity | ~486 | J/(kg·K) | At room temperature |
| Electrical Resistivity (ρₑ) | 0.15 – 0.20 | µΩ·m | At 20 °C |
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Mechanical Properties
Tensile requirements per ASTM A573/A573M for Grade 58 (Grade 400). Values depend on plate thickness. Charpy V‑notch toughness is optional and can be ordered to supplementary requirements.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 32 (≥ 220) | ksi (MPa) | Thickness ≤ 40 mm |
| Tensile Strength (Rm) | 58 – 71 (400 – 490) | ksi (MPa) | Thickness ≤ 40 mm |
| Elongation in 200 mm (A200) | ≥ 21 | % | Thickness ≤ 20 mm |
| Elongation in 200 mm (A200) | ≥ 20 | % | 20 < thickness ≤ 40 mm |
| Elongation in 50 mm (A50) | ≥ 24 | % | Thickness ≤ 20 mm |
| Elongation in 50 mm (A50) | ≥ 23 | % | 20 < thickness ≤ 40 mm |
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Equivalent Material Standards and Substitute Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A36/A36M | 36 (250) | Lower strength; not identical toughness |
| EU | EN 10025‑2 | S235JR | Similar yield (~235 MPa), tensile 360‑510 MPa; Charpy at room temp |
| Japan | JIS G3101 | SS400 | Tensile 400‑510 MPa, yield ≥ 245 MPa; broadly comparable |
| China | GB/T 700 | Q235B | Yield ≥ 235 MPa, tensile 370‑500 MPa; common structural steel |
| Australia/NZ | AS/NZS 3678 | 250 | Yield 250 MPa, tensile 410‑480 MPa; similar application range |
| India | IS 2062 | E250 (Fe 410 W) | Tensile 410‑510 MPa; weldable structural steel |
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Application Introduction
ASTM A573 Grade 58 steel coil is designed for structural applications that demand improved notch toughness without sacrificing weldability. It is commonly used in welded, bolted, or riveted constructions where loads are moderate and temperatures may drop below ambient. The material can be formed, cut, and joined using standard fabrication processes.
Product Applications: Welded bridge girders and box sections, Storage tank shells and roofs, Structural columns and beams, Pressure vessel shells (with supplementary tests), Farm and construction machinery frames, Piling and sheet piling products
Processed into products: Stiffener plates and gussets, Base plates and end plates for columns, Bracket and support elements, Flange and web plates in built‑up sections, Crane runway beams, Conveyor frames and chutes
Application industries: Bridge and highway construction, Building and infrastructure frames, Storage tanks and silos, Heavy machinery and agricultural equipment, Ship and offshore structures, Power generation plants
ASTM A573/A573M Grade 58 Structural Carbon Steel Coil Similar and Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A572/A572M | Grade 42 | Low‑alloy HSLA, higher strength but similar weldability |
| EU | EN 10025‑2 | S275JR | Slightly higher strength (275 MPa min yield); often interchangeable |
| Japan | JIS G3106 | SM400A/B | Weldable structural with 400 MPa tensile class |
| China | GB/T 1591 | Q345B | Higher strength; consider when design allows higher loads |
| International | ISO 630 | E235B | Comparable 220‑240 MPa yield class |
Notes:
Supplementary requirements – Charpy V‑notch impact tests can be specified (e.g., 20 ft·lbf at -20 °F). For thicknesses over 40 mm consult the standard for adjusted mechanical properties. All material produced to ASTM A573/A573M must be marked with mill name, grade identification, and melt number.
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