ASME SA573 Grade 58 Steel Plate
ASME SA573 Grade 58 Steel Plate: Properties, Equivalents & Applications
Complete datasheet for ASME SA573 Grade 58 (SA573GR58) carbon steel plate: chemical composition, mechanical and thermal properties, international equivalents, and application guidelines.
Hot rolling, normalizing, cutting, welding, bending, forming
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ASME SA573 Grade 58 Steel Plate Introduction
ASME SA573 Grade 58 is a carbon-silicon structural steel plate intended for riveted, bolted, or welded construction of bridges, buildings, and other structures. With a specified minimum tensile strength of 58 ksi (400 MPa) and good notch toughness, it offers a balance of strength, weldability, and formability. This material is typically supplied in the as-rolled or normalized condition and is well-suited for moderate-temperature service and general fabrication.
ASME SA573 Grade 58 Steel Plate Chemical Composition
Typical ladle analysis limits according to ASME SA573/SA573M for Grade 58, thickness ≤ 40 mm. For other thicknesses or special requirements, refer to the standard.
| Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.23 | Maximum; for thickness >40 mm, max 0.25% |
| Manganese (Mn) | 0.60 – 0.90 | For Grade 58 |
| Phosphorus (P) | ≤ 0.035 | Maximum |
| Sulfur (S) | ≤ 0.04 | Maximum |
| Silicon (Si) | 0.15 – 0.40 | Range for silicon-killed; may be 0.15–0.30% for other deoxidation practices |
| Copper (Cu) | ≥ 0.20 | Minimum when copper steel is specified (optional) |
ASME SA573 Grade 58 Steel Plate Thermal and Electrical Physical Properties
Typical physical properties for carbon steel plates are listed. These values are not specific to SA573 Grade 58 but are representative of structural carbon steels with similar composition and are useful for design.
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | At room temperature |
| Elastic Modulus (E) | 200 | GPa | At room temperature |
| Shear Modulus (G) | 77 | GPa | Estimated (E/(2(1+ν))) |
| Poisson's Ratio (ν) | 0.30 | – | Typical for steel |
| Thermal Expansion Coefficient (α) | 12.0 | 10⁻⁶/K | 20–100°C |
| Thermal Expansion Coefficient (α) | 12.5 | 10⁻⁶/K | 20–200°C |
| Thermal Expansion Coefficient (α) | 13.0 | 10⁻⁶/K | 20–300°C |
| Thermal Conductivity (λ) | 52 | W/(m·K) | At 20°C |
| Specific Heat Capacity | 460 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρₑ) | 0.15 | μΩ·m | At room temperature |
ASME SA573 Grade 58 Steel Plate Mechanical Properties
Tensile requirements according to ASME SA573/SA573M for Grade 58 plates.
- Yield strength values are minimum for the specified thickness.
- Elongation in 200 mm (8 in.) for plate thickness ≤ 20 mm; for other thicknesses, a 50 mm (2 in.) gauge length or proportional specimen is used.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | 58 – 71 | ksi | For all thicknesses |
| Tensile Strength (Rm) | 400 – 490 | MPa | For all thicknesses |
| Yield Strength (ReH), minimum | 32 | ksi | Thickness ≤ 20 mm |
| Yield Strength (ReH), minimum | 220 | MPa | Thickness ≤ 20 mm |
| Yield Strength (ReH), minimum | 29 | ksi | Thickness >20 mm to 40 mm |
| Yield Strength (ReH), minimum | 200 | MPa | Thickness >20 mm to 40 mm |
| Elongation (A) in 200 mm, minimum | 21 | % | Thickness ≤ 20 mm |
| Elongation (A) in 50 mm, minimum | 24 | % | Thickness >20 mm to 40 mm |
| Bend Test (bend diameter) | 1½ × thickness | – | 180° bend, cold; thickness ≤ 25 mm |
| Bend Test (bend diameter) | 2 × thickness | – | 180° bend, cold; thickness >25 mm to 40 mm |
ASME SA573 Grade 58 Steel Plate Directly Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A573/A573M | Grade 58 | Identical to ASME SA573; same chemical and mechanical requirements |
| International | ASME SA573/SA573M | Grade 58 | Boiler and Pressure Vessel Code edition; same as ASTM |
ASME SA573 Grade 58 Steel Plate Application Introduction
ASME SA573 Grade 58 plates are widely used in structural engineering due to their reliable mechanical properties and good weldability. The material can be readily cut, drilled, machined, and formed using conventional methods.
Product Applications: Structural frameworks, columns, and beams, Bridge decks and girders, Pressure vessel shells (within design limits), Storage tank bottoms and roofs, Railcar side frames and bolsters, Welded tubular structures, Material handling equipment
Processed into products: Gusset plates, splice plates, and connection angles, Base plates and stiffeners, Fabricated box sections and truss members, Pipe supports and hangers, Machine bases and frames, Earthmoving equipment buckets and blades
Application industries: Bridge construction and repair, Commercial and industrial buildings, Railway rolling stock and automotive components, Storage tanks and silos (non-pressure or low-pressure), Transmission towers and telecommunication masts, Shipbuilding (non-classified structural parts), Machinery manufacturing and heavy equipment
ASME SA573 Grade 58 Steel Plate Similar and Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-2 | S275J0 (1.0143) / S275J2 (1.0145) | Similar tensile strength (410–560 MPa) and yield (~275 MPa). Verify impact toughness and weldability requirements. |
| Japan | JIS G3106 | SM400B / SM400C | Tensile class 400–510 MPa; similar structural use. Impact properties depend on subgrade. |
| China | GB/T 700 | Q235B / Q235C | Similar tensile strength range (375–500 MPa), but lower specified yield (235 MPa). Check toughness. |
| India | IS 2062 | E250 (Fe 410W) B / C | Comparable yield and tensile strength for general structural applications. |
| Russia | GOST 380 / GOST 535 | St3sp / St3ps | Close in carbon-manganese composition and strength; impact test options differ. |
Notes:
- When impact testing is required, refer to supplementary requirements S5 of ASTM A6/A6M. Charpy V-notch values should be specified by the purchaser.
- Flange-quality steel for concentrated load conditions is not covered; use only as specified in ASME SA573/SA573M.
- Welding should comply with the applicable structural welding code (AWS D1.1 or ASME Section IX). Preheating and post-weld heat treatment may be needed based on thickness and service conditions.
- Tolerances are per ASTM A6/A6M unless otherwise agreed.
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