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AISI 201LN Stainless Steel vs. ASTM A229 Spring Steel

Both AISI 201LN stainless steel and ASTM A229 spring steel are iron alloys. They have 72% 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 AISI 201LN stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25 to 51
14
Fatigue Strength, MPa 340 to 540
710 to 790
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 530 to 680
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
1690 to 1890
Tensile Strength: Yield (Proof), MPa 350 to 770
1100 to 1230

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
3260 to 4080
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 38
60 to 67
Strength to Weight: Bending, points 24 to 30
40 to 43
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 16 to 23
54 to 60

Alloy Composition

Carbon (C), % 0 to 0.030
0.55 to 0.85
Chromium (Cr), % 16 to 17.5
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
97.5 to 99
Manganese (Mn), % 6.4 to 7.5
0.3 to 1.2
Nickel (Ni), % 4.0 to 5.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.050

Comparable Variants