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A36 Carbon Steel Plate
1. Product Overview
ASTM A36 Carbon Steel Plate is a widely-used, general-purpose structural steel conforming to the ASTM A36 standard.Its primary advantages lie in its excellent weldability and formability, allowing for easy fabrication and versatile shaping. A36 plate is commonly specified in construction for bridges, buildings, and framing, and is a fundamental material in general machinery, equipment bases, and various industrial fabrications. The combination of its predictable mechanical properties, ready availability, and cost-effectiveness makes it a reliable and economical choice for numerous structural and non-critical applications.
2. Key Features
(1)Standard Compliance:
Conforms to the widely recognized ASTM A36/A36M standard, ensuring consistent quality and properties.
(2)Mechanical Properties:
Offers a minimum yield strength of 250 MPa (36 ksi) and good tensile strength for reliable structural performance.
(3)Excellent Weldability:
Can be easily joined using all common welding methods without requiring pre-heating, simplifying fabrication.
(4)Good Formability & Ductility:
Exhibits good elongation, allowing it to be readily formed, bent, and shaped for versatile applications.
(5)High Machinability:
Relatively easy to cut, drill, and machine compared to higher-carbon or alloy steels.
(6)Cost-Effectiveness:
As a common, low-carbon steel, it provides an optimal balance of strength, workability, and affordability.
3. Technical Parameters of A36 Carbon Steel Plate
| Parameter | Specification Range | Standard / Note |
| Standard Designation | ASTM A36 / A36M | Main governing standard |
| Product Form | Hot-Rolled Plate | Thickness 0.6-200mm |
| Thickness Range | 0.6mm ~ 200mm (approx.) | Commonly stocked range |
| Width Range | 1500mm ~ 3000mm+ | Mill-dependent |
| Length Range | 6000mm ~ 12000mm+ | Standard lengths; cut-to-order available |
| Yield Strength (Min) | 250 MPa (36,000 psi) | Minimum requirement |
| Tensile Strength | 400 – 550 MPa (58,000 – 80,000 psi) | Typical range |
| Elongation (Min) | 20% (in 200mm) / 23% (in 50mm) | Minimum requirement |
| Chemical Composition | C ≤ 0.26%, Mn ≤ 0.75-1.20%, P ≤ 0.04%, S ≤ 0.05% | Max % by weight |
| Primary Application | Structural frameworks, bridges, buildings, general fabrication | — |
4. Application Scenarios
(1)Structural Fabrication in Construction:
Primarily used for building frames, bridges, industrial platforms, and base plates due to its reliable strength and excellent weldability, forming the core load-bearing skeleton.
(2)General Machinery and Equipment Manufacturing:
Commonly employed in fabricating machine bases, frames, brackets, guards, and agricultural equipment where good formability and a balance of strength with cost are essential.
(3)Infrastructure and Transportation Components:
Found in support structures for railings, stairs, truck frames, trailer beds, and shipping containers, serving as a versatile and durable material for general structural and non-critical parts.
5. FAQ
Q1: What are the main limitations of A36 plate?
A1：Its limitations include relatively low strength compared to high-strength low-alloy (HSLA) steels, no guaranteed impact toughness at low temperatures, and a tendency for thicker sections (>20mm) to have actual yield strength close to the minimum 250 MPa requirement.
Q2:How does A36 compare to ASTM A572 Grade 50?
A2:A572 Grade 50 offers a higher minimum yield strength (345 MPa / 50 ksi) and better atmospheric corrosion resistance, but it is typically more expensive and less readily available than A36. Choose A36 for general-purpose applications and A572 Grade 50 where higher strength-to-weight ratio or better corrosion performance is needed.
Q3:Is A36 suitable for outdoor or marine environments without protection?
A3:A36 is a plain carbon steel with no inherent corrosion resistance. It will rust when exposed to moisture and atmosphere. For outdoor or harsh environments, proper surface protection (e.g., painting, galvanizing) or the use of weathering or stainless steel is necessary.
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