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ASTM A229 Spring Steel vs. AISI 201L Stainless Steel

Both ASTM A229 spring steel and AISI 201L stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is AISI 201L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
190 to 320
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
22 to 46
Fatigue Strength, MPa 710 to 790
270 to 530
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 1020 to 1140
520 to 660
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
740 to 1040
Tensile Strength: Yield (Proof), MPa 1100 to 1230
290 to 790

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
880
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.6
Embodied Energy, MJ/kg 19
38
Embodied Water, L/kg 46
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
210 to 300
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
220 to 1570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 60 to 67
27 to 37
Strength to Weight: Bending, points 40 to 43
24 to 30
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 54 to 60
16 to 23

Alloy Composition

Carbon (C), % 0.55 to 0.85
0 to 0.030
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 97.5 to 99
67.9 to 75
Manganese (Mn), % 0.3 to 1.2
5.5 to 7.5
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030

Comparable Variants