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ASTM A227 Spring Steel vs. K94200 Alloy

Both ASTM A227 spring steel and K94200 alloy are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is K94200 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 12
5.0 to 32
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
54
Shear Strength, MPa 1030 to 1330
330 to 410
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
500 to 710
Tensile Strength: Yield (Proof), MPa 1430 to 1850
270 to 650

Thermal Properties

Melting Onset (Solidus), °C 1410
1440
Specific Heat Capacity, J/kg-K 470
500
Thermal Conductivity, W/m-K 52
15
Thermal Expansion, µm/m-K 12
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
35 to 130
Stiffness to Weight: Axial, points 13
9.8
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 61 to 79
17 to 24
Strength to Weight: Bending, points 41 to 48
17 to 22
Thermal Diffusivity, mm2/s 14
3.7
Thermal Shock Resistance, points 55 to 71
49 to 70

Comparable Variants