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ASTM A227 Spring Steel vs. AISI 414 Stainless Steel

Both ASTM A227 spring steel and AISI 414 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is AISI 414 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
17
Fatigue Strength, MPa 900 to 1160
430 to 480
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 1030 to 1330
550 to 590
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
900 to 960
Tensile Strength: Yield (Proof), MPa 1430 to 1850
700 to 790

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
750
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.1
Embodied Energy, MJ/kg 19
29
Embodied Water, L/kg 46
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
140 to 150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 61 to 79
32 to 34
Strength to Weight: Bending, points 41 to 48
27 to 28
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 55 to 71
33 to 35

Alloy Composition

Carbon (C), % 0.45 to 0.85
0 to 0.15
Chromium (Cr), % 0
11.5 to 13.5
Iron (Fe), % 97.4 to 99.1
81.8 to 87.3
Manganese (Mn), % 0.3 to 1.3
0 to 1.0
Nickel (Ni), % 0
1.3 to 2.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030

Comparable Variants