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S45000 Stainless Steel vs. ASTM A229 Spring Steel

Both S45000 stainless steel and ASTM A229 spring steel are iron alloys. They have 77% of their average alloy composition in common. There are 31 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 S45000 stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 410
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 6.8 to 14
14
Fatigue Strength, MPa 330 to 650
710 to 790
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 590 to 830
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 980 to 1410
1690 to 1890
Tensile Strength: Yield (Proof), MPa 580 to 1310
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 840
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
50
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 39
19
Embodied Water, L/kg 130
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 94 to 160
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 850 to 4400
3260 to 4080
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 35 to 50
60 to 67
Strength to Weight: Bending, points 28 to 36
40 to 43
Thermal Diffusivity, mm2/s 4.5
14
Thermal Shock Resistance, points 33 to 47
54 to 60

Alloy Composition

Carbon (C), % 0 to 0.050
0.55 to 0.85
Chromium (Cr), % 14 to 16
0
Copper (Cu), % 1.3 to 1.8
0
Iron (Fe), % 72.1 to 79.3
97.5 to 99
Manganese (Mn), % 0 to 1.0
0.3 to 1.2
Molybdenum (Mo), % 0.5 to 1.0
0
Nickel (Ni), % 5.0 to 7.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.050

Comparable Variants