A514 | High-Strength Structural Steel
A514 | High-Strength Structural Steel
A514, also called T-1 steel, is a high-strength alloy known for its toughness. The “A” indicates ASTM standards, and “514” reflects its 100,000 psi (700 MPa) minimum yield strength. It offers good weldability and machinability, ideal for load-bearing uses in construction and heavy equipment. Equivalent grades include ASTM A517, S700MC, and E690D.
We offer A514 products with 6 to 120mm thicknesses (customizable), 900~4800 mm widths, and 3000~25000 mm lengths according to the ASTM A514 standard.
Description
What is A514?
Characteristics of A514 Steel
Chemical Compositions
Element | Content (%) |
---|---|
Carbon, C | 0.12 – 0.21 |
Manganese, Mn | 0.60 – 1.00 |
Phosphorus, P | ≤ 0.035 |
Sulfur, S | ≤ 0.035 |
Silicon, Si | 0.15 – 0.35 |
Chromium, Cr | 0.40 – 0.65 |
Molybdenum, Mo | 0.15 – 0.25 |
Vanadium, V | 0.03 – 0.08 |
Boron, B | ≤ 0.003 |
Nickel, Ni (optional) | 0.25 max |
Physical Properties
Property | Value (Metric) | Value (Imperial) |
---|---|---|
Density | 7.85 g/cm³ | 0.283 lb/in³ |
Melting Point | 1,425 – 1,538 °C | 2,597 – 2,800 °F |
Boiling Point | ~3,000 °C | ~5,432 °F |
Thermal Conductivity | 36 – 50 W/m·K | 250 – 350 BTU·in/hr·ft²·°F |
Electrical Conductivity | 3 – 7 MS/m | 3 – 7 MS/m |
Specific Heat Capacity | 486 J/kg·K | 0.116 BTU/lb·°F |
Thermal Expansion Coefficient | 12 x 10⁻⁶ /K | 6.7 x 10⁻⁶ /°F |
Electrical Resistivity | 25 x 10⁻⁸ Ω·m | 25 x 10⁻⁸ Ω·m |
Mechanical Properties
Property | Value (Metric) | Value (Imperial) |
---|---|---|
Tensile Strength | 690 – 895 MPa | 100,000 – 130,000 psi |
Yield Strength | ≥ 690 MPa | ≥ 100,000 psi |
Brinell Hardness | 235 – 300 HB | 235 – 300 HB |
Rockwell Hardness | 22 – 30 HRC | 22 – 30 HRC |
Vickers Hardness | 245 – 310 HV | 245 – 310 HV |
Elongation | 16 – 18% | 16 – 18% |
Elastic Modulus | 200 GPa | 29,000 ksi |
Data After QT(Quenching and Tempering) Processing
Property | Metric | Imperial |
---|---|---|
Tensile Strength | 760 – 940 MPa | 110,000 – 136,000 psi |
Yield Strength | ≥ 725 MPa | ≥ 105,000 psi |
Brinell Hardness | 280 – 340 HB | 280 – 340 HB |
Rockwell Hardness | 30 – 35 HRC | 30 – 35 HRC |
Vickers Hardness | 290 – 350 HV | 290 – 350 HV |
Elongation | 12 – 15% | 12 – 15% |
Elastic Modulus | 200 GPa | 29,000 ksi |
Industries & Applications
Industries | Products |
---|---|
Construction | Bridges, Skyscrapers, Beams, Columns, Frames |
Mining | Excavator Buckets, Dump Truck Bodies, Shovels, Chutes, Crushers |
Heavy Equipment | Cranes, Forklifts, Bulldozers, Loaders, Backhoes |
Transportation | Rail Cars, Truck Trailers, Cargo Containers, Ship Decks, Aerospace Components |
Oil & Gas | Offshore Platforms, Pipelines, Drilling Equipment, Tanks, Pressure Vessels |
Military & Defense | Armored Vehicles, Tanks, Missile Launchers, Military Bridges, Bunkers |
Manufacturing | Press Frames, Mold Bases, Dies, Conveyor Systems, Machine Parts |
Energy | Wind Turbine Towers, Hydropower Plants, Nuclear Plant Structures, Transmission Towers, Solar Equipment |
Machining
A514 Heat Treatment
- Preheating:
- Heat the steel to 650 – 750°C (1200 – 1380°F).
- This reduces thermal stress during further heating.
- Austenitizing:
- Heat the steel to 900 – 940°C (1650 – 1725°F) and hold it until the material reaches uniform temperature.
- At this stage, the steel transforms into austenite, ready for quenching.
- Quenching:
- Rapidly cool the steel in water or oil.
- This step increases hardness and strength by transforming austenite into martensite.
- Tempering:
- Heat the steel to 200 – 650°C (390 – 1200°F), depending on the desired balance between hardness and toughness.
- This step relieves internal stress, improves ductility, and refines hardness.
A514 Surface Treatments
- Galvanization: Adds a zinc coating to improve corrosion resistance.
- Powder Coating: Provides enhanced durability and aesthetic appeal with color options.
- Anodizing: Increases surface hardness and wear resistance.
- Shot Peening: Improves fatigue strength by introducing compressive stress on the surface.
- Electroplating: Deposits a thin metal layer (e.g., chromium or nickel) to improve corrosion and wear resistance.
- Polishing: Achieves a smooth, reflective surface for decorative or functional purposes.
- Pickling and Passivation: Removes surface contaminants and prevents corrosion.
Custom surface treatment requirements can be accommodated upon request.
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