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N08020 Stainless Steel vs. ASTM A229 Spring Steel

Both N08020 stainless steel and ASTM A229 spring steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is N08020 stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 34
14
Fatigue Strength, MPa 210 to 240
710 to 790
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 380 to 410
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 610 to 620
1690 to 1890
Tensile Strength: Yield (Proof), MPa 270 to 420
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1360
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
50
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 38
1.8
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 6.6
1.4
Embodied Energy, MJ/kg 92
19
Embodied Water, L/kg 220
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 170
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 440
3260 to 4080
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
60 to 67
Strength to Weight: Bending, points 20
40 to 43
Thermal Diffusivity, mm2/s 3.2
14
Thermal Shock Resistance, points 15
54 to 60

Alloy Composition

Carbon (C), % 0 to 0.070
0.55 to 0.85
Chromium (Cr), % 19 to 21
0
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 29.9 to 44
97.5 to 99
Manganese (Mn), % 0 to 2.0
0.3 to 1.2
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 32 to 38
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.050

Comparable Variants