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ASTM A203 Steel vs. ASTM A227 Spring Steel

Both ASTM A203 steel and ASTM A227 spring steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A203 steel and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
500 to 640
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22 to 26
12
Fatigue Strength, MPa 210 to 280
900 to 1160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 330 to 370
1030 to 1330
Tensile Strength: Ultimate (UTS), MPa 520 to 590
1720 to 2220
Tensile Strength: Yield (Proof), MPa 290 to 390
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
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 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5 to 8.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2 to 4.0
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6 to 1.7
1.4
Embodied Energy, MJ/kg 21 to 23
19
Embodied Water, L/kg 50 to 52
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
200 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
61 to 79
Strength to Weight: Bending, points 18 to 20
41 to 48
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 15 to 17
55 to 71

Comparable Variants