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ACI-ASTM CA6N Steel vs. ASTM A232 Spring Steel

Both ACI-ASTM CA6N steel and ASTM A232 spring steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6N steel and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
14
Fatigue Strength, MPa 640
1040
Poisson's Ratio 0.28
0.29
Reduction in Area, % 57
46
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 1080
1790
Tensile Strength: Yield (Proof), MPa 1060
1610

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 740
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
52
Thermal Expansion, µm/m-K 9.9
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
2.0
Embodied Energy, MJ/kg 35
28
Embodied Water, L/kg 110
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 38
64
Strength to Weight: Bending, points 30
42
Thermal Diffusivity, mm2/s 6.1
14
Thermal Shock Resistance, points 40
53

Alloy Composition

Carbon (C), % 0 to 0.060
0.48 to 0.53
Chromium (Cr), % 10.5 to 12.5
0.8 to 1.1
Iron (Fe), % 77.9 to 83.5
96.8 to 97.7
Manganese (Mn), % 0 to 0.5
0.7 to 0.9
Nickel (Ni), % 6.0 to 8.0
0
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.035
Vanadium (V), % 0
0.15 to 0.3