ASTM A514 Steel vs. ASTM A229 Spring Steel
Both ASTM A514 steel and ASTM A229 spring steel are iron alloys.
For each property being compared, the top bar is ASTM A514 steel and the bottom bar is ASTM A229 spring steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 240 to 250 | |
490 to 550 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 18 to 21 | |
14 |
Fatigue Strength, MPa | 470 to 540 | |
710 to 790 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
72 |
Shear Strength, MPa | 490 to 520 | |
1020 to 1140 |
Tensile Strength: Ultimate (UTS), MPa | 790 to 830 | |
1690 to 1890 |
Tensile Strength: Yield (Proof), MPa | 690 to 770 | |
1100 to 1230 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 to 260 | |
250 |
Maximum Temperature: Mechanical, °C | 400 to 440 | |
400 |
Melting Completion (Liquidus), °C | 1460 | |
1450 |
Melting Onset (Solidus), °C | 1420 | |
1410 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 37 to 51 | |
50 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.6 | |
7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 to 8.8 | |
8.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.3 to 3.8 | |
1.8 |
Density, g/cm3 | 7.8 to 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.6 to 1.8 | |
1.4 |
Embodied Energy, MJ/kg | 21 to 25 | |
19 |
Embodied Water, L/kg | 48 to 57 | |
46 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 170 | |
200 to 230 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1280 to 1590 | |
3260 to 4080 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 28 to 29 | |
60 to 67 |
Strength to Weight: Bending, points | 24 to 25 | |
40 to 43 |
Thermal Diffusivity, mm2/s | 10 to 14 | |
14 |
Thermal Shock Resistance, points | 23 to 24 | |
54 to 60 |