A514 Steel properties
A514, often known by the trade name T-1, is a quenched-and-tempered high-strength structural steel with a 100 ksi yield. It is used where very high strength and toughness are needed in a weldable plate, such as crane booms and heavy machinery.
Mechanical properties
| Property | Value |
|---|---|
| Yield strength | 100 ksi (690 MPa) |
| Ultimate tensile strength | 110 to 130 ksi (760 to 895 MPa) |
| Elongation | 18% |
| Hardness | about 235 HB (Brinell) |
| Modulus of elasticity | 29,000 ksi (200 GPa) |
Physical properties
| Property | Value |
|---|---|
| Density | 0.284 lb/in³ (7850 kg/m³) |
| Melting point | about 1425 to 1540 °C |
Thermal properties
| Property | Value |
|---|---|
| Thermal conductivity | about 42 W/m·K |
| Thermal expansion | 12 µm/m·°C |
| Specific heat | 486 J/kg·K |
Values are typical for the grade and condition shown. Actual properties vary with temper, heat treatment, and product form, so use these for comparison and preliminary design and confirm against material certificates for final work.
Compare with other materials
See the Material Properties Comparison, Yield Strength, and Density charts.
Typical uses
A514 is used for crane and excavator booms, truck frames, heavy structural members, and equipment that must be strong yet light. Its high yield allows very thin, light sections, and it stays tough at low temperatures, suiting demanding mobile equipment.
How it compares
A514 is roughly three times as strong in yield as A36 and twice as strong as A572-50, while remaining weldable with controlled procedures. It costs more and demands careful welding to preserve its quenched-and-tempered properties, so it is reserved for high-strength applications.
FAQ
What is A514 steel?
A quenched-and-tempered high-strength structural steel with a 100 ksi yield, also known as T-1, used for booms, frames, and heavy machinery.
Can A514 be welded?
Yes, but with controlled heat input and often preheat, to avoid softening the heat-affected zone and preserve its strength and toughness.
How strong is A514 compared to A36?
About three times the yield strength, 100 ksi versus 36 ksi, allowing much lighter sections for the same load.