ASME SA572 Grade 65 Carbon Steel Plate
ASME SA572 Grade 65 Carbon Steel Plate - High-Strength Low-Alloy Structural Steel for Heavy-Duty Applications
Comprehensive data and analysis for ASME SA572 Grade 65 (SA572GR65) carbon steel plate, including chemical composition, mechanical and thermal properties, international equivalents, and application guide.
Suitable for machining, welding, forming, and hot/cold bending. Normalizing may be applied for improved toughness in thicker sections.
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ASME SA572 Grade 65 Carbon Steel Plate Introduction
ASME SA572 Grade 65 (SA572GR65) is a high-strength low-alloy (HSLA) structural steel plate standardized under ASME SA572/SA572M, identical to ASTM A572 Grade 65. It offers a minimum yield strength of 65 ksi (450 MPa) in thicknesses up to 1.25 inches (32 mm), making it suitable for structural applications where weight reduction without sacrificing strength is critical. Key features:
- Excellent strength-to-weight ratio
- Good weldability and formability
- Cost-effective solution for bridges, buildings, and heavy machinery
- Available in as-rolled or normalized conditions depending on thickness
The steel contains micro-alloying elements such as niobium, vanadium, titanium, or molybdenum to achieve enhanced mechanical properties.
ASME SA572 Grade 65 Carbon Steel Plate Chemical Composition
Composition as specified in ASME SA572/SA572M for Grade 65 plates up to 1.25 in. [32 mm] thick. At least one of the following micro-alloying elements must be added in the minimum amount shown: Niobium (Columbium) 0.005%, Vanadium 0.02%, Titanium 0.005%, or Molybdenum 0.08%. Copper may be specified for improved atmospheric corrosion resistance. Values are maxima unless a range is given.
| Element | Specification Value | Notes |
|---|---|---|
| Carbon (C) | 0.23 max | For plates ≤1.25 in. |
| Manganese (Mn) | 1.65 max | Increases strength and hardenability |
| Phosphorus (P) | 0.040 max | Impurity limit |
| Sulfur (S) | 0.050 max | Impurity limit |
| Silicon (Si) | 0.40 max | Deoxidizer |
| Niobium (Nb, Columbium) | 0.005 min (if used) | Grain refiner; one of Nb/V/Ti/Mo required |
| Vanadium (V) | 0.02 min (if used) | Strengthening; one of Nb/V/Ti/Mo required |
| Titanium (Ti) | 0.005 min (if used) | Deoxidizer/grain refiner; one of Nb/V/Ti/Mo required |
| Molybdenum (Mo) | 0.08 min (if used) | Strength/temper resistance; one of Nb/V/Ti/Mo required |
| Copper (Cu) | 0.20 min (when specified) | Optional for weathering steel (Type 2) |
ASME SA572 Grade 65 Carbon Steel Plate Thermal and Electrical Physical Properties
Values are representative of carbon-manganese structural steels and are suitable for engineering calculations. No grade-specific official values are mandated by ASME SA572. These data are drawn from general steel references and may vary slightly with exact composition and processing. For precise design, consult material-specific test reports.
| Property | Typical Value | Unit | Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | Room temperature |
| Elastic Modulus (E) | 200 | GPa | Room temperature |
| Shear Modulus (G) | 77 | GPa | Calculated from E and ν |
| Poisson's Ratio (ν) | 0.30 | – | Elastic range |
| Thermal Expansion Coefficient (α) | 11.7 | 10⁻⁶/K | 0–100°C |
| Thermal Expansion Coefficient (α) | 12.5 | 10⁻⁶/K | 0–200°C |
| Thermal Conductivity (λ) | 52 | W/(m·K) | At 20°C |
| Specific Heat Capacity (cp) | 486 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρe) | 0.16 | µΩ·m | At 20°C |
ASME SA572 Grade 65 Carbon Steel Plate Mechanical Properties
Tensile and yield properties apply to plates up to 1.25 in. [32 mm] in thickness, tested in the longitudinal direction. Elongation requirements vary with specimen type and thickness. For plates over 1.25 in., the minimum yield and tensile strengths are reduced according to the standard. Impact testing (Charpy V-notch) is not mandatory but may be specified for normalized or controlled-rolled products.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | 65 min (450 min) | ksi (MPa) | Thickness ≤ 1.25 in. (32 mm) |
| Tensile Strength (Rm) | 80 min (550 min) | ksi (MPa) | Thickness ≤ 1.25 in. (32 mm) |
| Elongation in 200 mm (8 in.) | 15 min | % | For plate thickness ≤ 0.625 in. (16 mm) |
| Elongation in 50 mm (2 in.) | 17 min | % | For plate thickness > 0.625 in. (16 mm) or standard gage |
| Bend Test (optional) | No cracking | – | D = 2T (typical, as agreed) |
| Charpy V-Notch Impact (optional) | As specified (e.g., 20 ft·lbf @ -20°F) | ft·lbf (J) | Only when ordered with supplementary requirements |
ASME SA572 Grade 65 Carbon Steel Plate Fully Equivalent Material Standards and Designations
Materials listed below are identical in chemical and mechanical requirements, though some variations may exist. Careful comparison of thickness ranges and supplementary requirements is advised.
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| USA | ASTM A572/A572M | Grade 65 | Identical to ASME SA572 Grade 65 |
| USA | ASME SA572/SA572M | Grade 65 [SA572GR65] | Original standard |
| China | GB/T 1591 | Q460C/D/E | Yield ≥460 MPa; check thickness limits and impact |
| Europe | EN 10025-3 | S460N/NL | Similar strength, normalized; verify chemistry |
| Japan | JIS G3106 | SM570 | Yield ≥450 MPa (t≤16 mm), similar scope |
| International | ISO 4950-2 | E 460 DD/E | High yield structural steel, comparable |
ASME SA572 Grade 65 Carbon Steel Plate Application Introduction
ASME SA572 Grade 65 steel plates are designed for structural applications where high strength, good weldability, and moderate corrosion resistance are required. The micro-alloy design allows weight reduction in transportation and erection. Typical industries and products include:
Product Applications: Bridge girders, trusses, and deck plates, Building columns, beams, and bracing members, Excavator booms and crane sections, Freight car bodies and chassis, Wind tower shells, Offshore module frames
Processed into products: Welded structural assemblies, Bolted or riveted connections, Flanges and stiffeners, Base plates and anchor boxes, Cut, bent, or rolled profiles, Dump truck bodies (hardened wear surfaces)
Application industries: Construction and civil engineering, Heavy machinery manufacturing, Shipbuilding and offshore platforms, Transportation (railway cars, trailer frames), Renewable energy (wind turbine towers), Mining and material handling equipment
ASME SA572 Grade 65 Carbon Steel Plate Similar and Near-Equivalent Alternative Materials
These grades offer comparable strength or application suitability but may differ in chemistry, welding behavior, or delivery condition. A full engineering analysis is recommended before substitution.
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| USA | ASTM A572/A572M | Grade 60 | Lower yield (415 MPa), similar formability |
| Europe | EN 10025-4 | S460M/ML | Thermomechanical rolled, equivalent strength, better toughness |
| China | GB/T 1591 | Q550D/E | Higher yield (550 MPa), may require preheat for welding |
| India | IS 2062 | E450 FE440 | Structural steel with 450 MPa yield, similar applications |
| Russia | GOST 19281 | 17G1S (17Г1С) | Low-alloy steel with 345–490 MPa yield, used in bridges |
Notes:
- Welding: Low-carbon equivalent (<0.45%) allows welding without preheat in thin sections; follow AWS D1.1 for procedures.
- Weathering option: When copper is specified (0.20% min), the steel gains improved atmospheric corrosion resistance (often called ASTM A572 Type 2).
- Thickness limits: Mechanical properties are guaranteed only for thickness ≤1.25 in. (32 mm). For thicker plates, consult mill for applicable strengths.
- Certification: En10204 3.1 or 3.2 inspection certificates are available upon request for SA572 material.
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