MakeItFrom.com
Menu (ESC)

ASTM A231 Spring Steel vs. EN 1.6958 Steel

Both ASTM A231 spring steel and EN 1.6958 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A231 spring steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
16
Fatigue Strength, MPa 1000
700
Poisson's Ratio 0.29
0.29
Reduction in Area, % 46
56
Shear Modulus, GPa 73
73
Shear Strength, MPa 1080
700
Tensile Strength: Ultimate (UTS), MPa 1790
1140
Tensile Strength: Yield (Proof), MPa 1570
1070

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
450
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
47
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
2.0
Embodied Energy, MJ/kg 28
27
Embodied Water, L/kg 51
60

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 64
40
Strength to Weight: Bending, points 42
31
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 53
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0.48 to 0.53
0.25 to 0.3
Chromium (Cr), % 0.8 to 1.1
1.2 to 1.7
Iron (Fe), % 96.7 to 97.7
92.6 to 94.5
Manganese (Mn), % 0.7 to 0.9
0.2 to 0.5
Molybdenum (Mo), % 0
0.35 to 0.55
Nickel (Ni), % 0
3.3 to 3.8
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0.15 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.015
Vanadium (V), % 0.15 to 0.3
0 to 0.12