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ASTM A27 Cast Steel vs. ASTM A227 Spring Steel

Both ASTM A27 cast steel and ASTM A227 spring steel are iron alloys. There are 28 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 ASTM A27 cast 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, % 25 to 27
12
Fatigue Strength, MPa 170 to 230
900 to 1160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 460 to 550
1720 to 2220
Tensile Strength: Yield (Proof), MPa 230 to 310
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 52
52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0 to 7.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 45 to 46
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
200 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 20
61 to 79
Strength to Weight: Bending, points 17 to 19
41 to 48
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 15 to 18
55 to 71

Comparable Variants