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ACI-ASTM CA6N Steel vs. ASTM A227 Spring Steel

Both ACI-ASTM CA6N steel and ASTM A227 spring steel are iron alloys. They have 81% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
12
Fatigue Strength, MPa 640
900 to 1160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Tensile Strength: Ultimate (UTS), MPa 1080
1720 to 2220
Tensile Strength: Yield (Proof), MPa 1060
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 740
400
Melting Completion (Liquidus), °C 1440
1450
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
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.4
Embodied Energy, MJ/kg 35
19
Embodied Water, L/kg 110
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
200 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 38
61 to 79
Strength to Weight: Bending, points 30
41 to 48
Thermal Diffusivity, mm2/s 6.1
14
Thermal Shock Resistance, points 40
55 to 71

Alloy Composition

Carbon (C), % 0 to 0.060
0.45 to 0.85
Chromium (Cr), % 10.5 to 12.5
0
Iron (Fe), % 77.9 to 83.5
97.4 to 99.1
Manganese (Mn), % 0 to 0.5
0.3 to 1.3
Nickel (Ni), % 6.0 to 8.0
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.050