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ACI-ASTM CA6NM Steel vs. ASTM A232 Spring Steel

Both ACI-ASTM CA6NM steel and ASTM A232 spring steel are iron alloys. They have 83% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6NM steel and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
540
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
14
Fatigue Strength, MPa 380
1040
Poisson's Ratio 0.28
0.29
Reduction in Area, % 40
46
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 850
1790
Tensile Strength: Yield (Proof), MPa 620
1610

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 770
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
52
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
2.0
Embodied Energy, MJ/kg 34
28
Embodied Water, L/kg 110
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
64
Strength to Weight: Bending, points 26
42
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 31
53

Alloy Composition

Carbon (C), % 0 to 0.060
0.48 to 0.53
Chromium (Cr), % 11.5 to 14
0.8 to 1.1
Iron (Fe), % 78.4 to 84.6
96.8 to 97.7
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0
0.15 to 0.3