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ASTM A231 Spring Steel vs. N08800 Stainless Steel

Both ASTM A231 spring steel and N08800 stainless steel are iron alloys. They have 47% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM A231 spring steel and the bottom bar is N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
4.5 to 34
Fatigue Strength, MPa 1000
150 to 390
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 1080
340 to 580
Tensile Strength: Ultimate (UTS), MPa 1790
500 to 1000
Tensile Strength: Yield (Proof), MPa 1570
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
12
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.0
5.3
Embodied Energy, MJ/kg 28
76
Embodied Water, L/kg 51
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
42 to 160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 64
18 to 35
Strength to Weight: Bending, points 42
18 to 28
Thermal Diffusivity, mm2/s 14
3.0
Thermal Shock Resistance, points 53
13 to 25

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.48 to 0.53
0 to 0.1
Chromium (Cr), % 0.8 to 1.1
19 to 23
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 96.7 to 97.7
39.5 to 50.7
Manganese (Mn), % 0.7 to 0.9
0 to 1.5
Nickel (Ni), % 0
30 to 35
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Vanadium (V), % 0.15 to 0.3
0