ASTM A529
Basic Info
The ASTM A529 standard specifies the standard specifications for hot-rolled plates and strips used in the manufacture of ordinary strength carbon steel structures. These steels are commonly used in buildings, bridges, and other structures, with moderate strength and good workability. This standard covers the chemical composition, mechanical properties, and dimensional requirements of steel, ensuring that products meet quality standards and meet engineering design requirements.
Characteristics
High Strength: ASTM A529 steel is known for its high tensile strength, making it suitable for structural applications where strength is a primary consideration.
Good Weldability: This steel offers good weldability, allowing for ease of fabrication and construction without sacrificing structural integrity.
Excellent Formability: ASTM A529 steel can be easily formed into various shapes and profiles, making it adaptable to diverse structural designs and requirements.
Impact Resistance: It exhibits good impact resistance, making it suitable for structures subjected to dynamic loads and harsh environmental conditions.
Versatility: ASTM A529 steel is available in various grades and dimensions, providing flexibility in material selection for different structural components and projects.
ASTM A529 Data Sheet
Steel Grade
Dimensions and Tolerances
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Fabrication and Welding
ASTM A516 vs. ASTM A529 Steel Comparison
Steel Grade
Grade 50:
- Tensile Strength (MPa): 485 – 620
- Yield Strength (MPa): ≥ 345
- Elongation (%): ≥ 21
Grade 55:
- Tensile Strength (MPa): 520 – 690
- Yield Strength (MPa): ≥ 380
- Elongation (%): ≥ 20
Dimensions and Tolerances
Plate:
- Width (mm): 600 – 2000
- Thickness (mm): 6 – 120
- Tolerance on Thickness (mm): ±0.010 (0.25)
- Tolerance on Width (mm): ±0.025 (1.59)
Sheet:
- Width (mm): 600 – 2000
- Thickness (mm): 0.4 – 6.5
- Tolerance on Thickness (mm): ±0.010 (0.25)
- Tolerance on Width (mm): ±0.025 (1.59)
Strip:
- Width (mm): 12.7 – 610
- Thickness (mm): 0.4 – 5.16
- Tolerance on Thickness (mm): ±0.015 (0.38)
- Tolerance on Width (mm): ±0.025 (1.59)
Round Bar:
- Width (mm): 6 – 110
Equivalent Steel Grades
United Kingdom
- Equivalent Grade: BS 4360 50C
- Standard: BS 4360
- Notes: Structural steel grade
Germany
- Equivalent Grade: DIN 17100 St52-3
- Standard: DIN 17100
- Notes: Structural steel grade
Japan
- Equivalent Grade: JIS G3106 SM50A
- Standard: JIS G3106
- Notes: Rolled steel for welded structures
China
- Equivalent Grade: Q/T L21 Q345A
- Standard: Q/T L21
- Notes: High strength low alloy structural steel
Chemical Composition
Carbon (C)
- Composition Range (%): 0.2 max
Manganese (Mn)
- Composition Range (%): 1.2 – 1.6
Phosphorus (P)
- Composition Range (%): 0.04 max
Sulfur (S)
- Composition Range (%): 0.05 max
Mechanical Properties
Tensile Strength (MPa)
- Condition: Annealed
- Value: 420 – 620
- Condition: Tempered
- Value: 520 – 620
Yield Strength (MPa)
- Condition: Annealed
- Value: 345 min
- Condition: Tempered
- Value: 380 min
Elongation (%)
- Condition: Annealed
- Value: 21 min
- Condition: Tempered
- Value: 20 min
Fabrication and Welding
Cutting:
Flame Cutting
- Guidelines: Use proper cutting tools and techniques
- Notes: Avoid excessive heat input and maintain cleanliness
Plasma Cutting
- Guidelines: Use appropriate cutting parameters and consumables
- Notes: Ensure proper ventilation and safety precautions
Shearing
- Guidelines: Ensure sharp blades and proper alignment
- Notes: Minimize edge distortion and burrs
Forming:
Hot Forming
- Guidelines: Follow recommended forming temperatures and methods
- Notes: Use suitable dies and lubricants for deformation
Cold Forming
- Guidelines: Preheat material as necessary for cold forming
- Notes: Use appropriate bending radius and avoid overstrain
Machining:
Drilling
- Guidelines: Use sharp drills and appropriate cutting speeds
- Notes: Provide adequate support and minimize vibration
Milling
- Guidelines: Select suitable tooling and cutting parameters
- Notes: Use coolant/lubricant for heat dissipation and chip removal
Turning
- Guidelines: Choose appropriate cutting tools and speeds
- Notes: Ensure proper fixturing and rigidity
Welding:
Arc Welding (SMAW, GMAW)
- Guidelines: Preheat and control interpass temperature
- Notes: Use low-hydrogen electrodes for SMAW and proper shielding gas for GMAW
Submerged Arc Welding
- Guidelines: Maintain proper flux coverage and travel speed
- Notes: Ensure clean and dry welding surfaces
Gas Tungsten Arc Welding (GTAW)
- Guidelines: Employ proper technique and shielding gas
- Notes: Use filler metal with suitable strength and ductility
Flux-Cored Arc Welding
- Guidelines: Select appropriate flux-cored wire and parameters
- Notes: Control travel speed and maintain proper arc length
Resistance Welding
- Guidelines: Ensure proper alignment and pressure during welding
- Notes: Minimize distortion and ensure adequate joint penetration
ASTM A516 vs. ASTM A529 Steel Comparison
Tensile Strength (MPa)
- ASTM A516: 485 – 620
- ASTM A529: 485 – 690 (Grade 55)
Yield Strength (MPa)
- ASTM A516: ≥ 205
- ASTM A529: 345 min (Grade 55)
Elongation (%)
- ASTM A516: ≥ 27
- ASTM A529: 21 min (Grade 55)
Impact Resistance
- ASTM A516: Good
- ASTM A529: Good
Weldability
- ASTM A516: Good
- ASTM A529: Good
Formability
- ASTM A516: Good
- ASTM A529: Good
Applications
- ASTM A516: Pressure vessels, boilers, storage tanks, piping
- ASTM A529: Structural applications, bridges, buildings
