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AISI 202 Stainless Steel vs. ASTM A229 Spring Steel

Both AISI 202 stainless steel and ASTM A229 spring steel are iron alloys. They have 69% 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 202 stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 45
14
Fatigue Strength, MPa 290 to 330
710 to 790
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 490 to 590
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 700 to 980
1690 to 1890
Tensile Strength: Yield (Proof), MPa 310 to 580
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 910
400
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1360
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 13
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 40
19
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 840
3260 to 4080
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 35
60 to 67
Strength to Weight: Bending, points 23 to 29
40 to 43
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 15 to 21
54 to 60

Alloy Composition

Carbon (C), % 0 to 0.15
0.55 to 0.85
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 63.5 to 71.5
97.5 to 99
Manganese (Mn), % 7.5 to 10
0.3 to 1.2
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
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