ASTM A992
Basic Info
The ASTM A992 standard specifies the standard specifications for high-strength low alloy steel profiles used in building structures. These profiles have excellent welding and mechanical properties and are widely used in bridges, buildings, and other structures. A992 profiles typically have higher strength and corrosion resistance, capable of withstanding larger loads and providing longer service life. This standard covers the chemical composition, mechanical properties, and dimensional requirements of profiles to ensure that products meet engineering design requirements and meet quality standards.
Characteristics
Exceptional Strength: ASTM A992 steel is renowned for its exceptional strength, stiffness, and resistance to atmospheric corrosion.
Wide Application Range: This steel grade is widely used in various structural applications, including building frames, bridges, and industrial structures.
Consistent Quality: ASTM A992 steel exhibits consistent mechanical properties and quality, ensuring reliable performance in diverse engineering projects.
Cost-Effective: With its superior strength-to-weight ratio, ASTM A992 steel offers cost-effective solutions for constructing robust and long-lasting structures.
ASTM A992 Data Sheet
Steel Grade
Dimensions and Tolerances
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Fabrication and Welding
Steel Grade
Grade 36
Grade 50
Grade 55
Grade 60
Grade 65
Grade 70
Dimensions and Tolerances
Grade 36
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Grade 50
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Grade 55
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Grade 60
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Grade 65
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Grade 70
- W Shapes: Width 4 – 36, Thickness 3/16 – 13, Tolerance ±1/16
- HP Shapes: Width 6 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- M Shapes: Width 3 – 14, Thickness 3/16 – 13, Tolerance ±1/16
- IFP Shapes: Width 6 – 12, Thickness 3/16 – 13, Tolerance ±1/16
- C Shapes: Width 3 – 7, Thickness 3/16 – 13, Tolerance ±1/16
Equivalent Steel Grades
Grade 36:
- United States: ASTM A36
- European Union: S235JR (EN 10025-2)
- China: Q235B (GB/T 700)
- Japan: SS400 (JIS G3101)
Grade 50:
- United States: ASTM A572 Grade 50
- European Union: S355JR (EN 10025-2)
- China: Q345B (GB/T 1591)
- Japan: SM490A (JIS G3106)
Grade 55:
- United States: ASTM A572 Grade 55
- European Union: S355JR (EN 10025-2)
- China: Q345B (GB/T 1591)
- Japan: SM490B (JIS G3106)
Grade 60:
- United States: ASTM A572 Grade 60
- European Union: S460JR (EN 10025-2)
- China: Q460C (GB/T 1591)
- Japan: (No equivalent grade specified)
Grade 70:
- United States: ASTM A572 Grade 70
- European Union: S460JR (EN 10025-2)
- China: Q460C (GB/T 1591)
- Japan: (No equivalent grade specified)
Chemical Composition
Grade 36:
- Carbon (C): 0.26 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Grade 50:
- Carbon (C): 0.23 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Grade 55:
- Carbon (C): 0.23 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Grade 60:
- Carbon (C): 0.26 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Grade 65:
- Carbon (C): 0.23 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Grade 70:
- Carbon (C): 0.27 max
- Manganese (Mn): 1.35 max
- Phosphorus (P): 0.04 max
- Sulfur (S): 0.05 max
- Silicon (Si): 0.40 max
Mechanical Properties
Grade 36:
- Yield Strength: 36 ksi
- Tensile Strength: 58-80 ksi
- Elongation: 21%
Grade 50:
- Yield Strength: 50 ksi
- Tensile Strength: 65-95 ksi
- Elongation: 18%
Grade 55:
- Yield Strength: 55 ksi
- Tensile Strength: 70-100 ksi
- Elongation: 17%
Grade 60:
- Yield Strength: 60 ksi
- Tensile Strength: 75-95 ksi
- Elongation: 16%
Grade 65:
- Yield Strength: 65 ksi
- Tensile Strength: 80-100 ksi
- Elongation: 15%
Grade 70:
- Yield Strength: 70 ksi
- Tensile Strength: 85-110 ksi
- Elongation: 14%
Fabrication and Welding
Grade 36:
- Fabrication Considerations: Can be easily welded using common techniques such as stick welding, MIG welding, and TIG welding.
- Welding Considerations: Welding of Grade 36 steel does not require preheating or post-weld heat treatment.
Grade 50:
- Fabrication Considerations: Suitable for most common fabrication methods such as cutting, drilling, bending, and machining.
- Welding Considerations: Welding Grade 50 steel requires careful attention to preheating and post-weld heat treatment to prevent cold cracking.
Grade 55:
- Fabrication Considerations: Requires careful handling during fabrication to avoid damaging the material properties.
- Welding Considerations: Welding Grade 55 steel requires preheating to prevent cold cracking. The specific preheating temperature must be controlled.
Grade 60:
- Fabrication Considerations: Fabrication techniques should avoid introducing significant deformation or stress to maintain material integrity.
- Welding Considerations: Welding Grade 60 steel requires careful control of preheating and post-weld heat treatment to avoid cracking.
Grade 65:
- Fabrication Considerations: Suitable for most fabrication methods but extra care is needed during processes like forming to avoid material degradation.
- Welding Considerations: Welding Grade 65 steel requires proper preheating and control of interpass temperatures to prevent cold cracking.
Grade 70:
- Fabrication Considerations: Requires careful handling to avoid deformation and damage during handling processes.
- Welding Considerations: Welding Grade 70 steel requires preheating and control of interpass temperatures to prevent cold cracking.
Seamless Construction: Unveiling the Welding Excellence of ASTM A992 Steel
ASTM A992 steel offers excellent weldability, allowing for ease of fabrication and efficient construction processes. Its composition and metallurgical properties enable it to be welded using common welding techniques such as arc welding, MIG welding, and TIG welding, without requiring extensive preheating or post-weld heat treatment. This simplifies the welding process and reduces the need for specialized equipment or labor-intensive procedures, resulting in cost savings and shorter project timelines.
Furthermore, the superior weldability of ASTM A992 steel ensures strong and durable weld joints, contributing to the overall structural integrity and safety of the finished project. Whether it’s for constructing high-rise buildings, bridges, or industrial facilities, the ease of welding ASTM A992 steel provides contractors and engineers with confidence in achieving high-quality, reliable structures that meet the stringent demands of modern construction standards and regulations.
