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ASTM A231 Spring Steel vs. ASTM A182 Grade F6b

Both ASTM A231 spring steel and ASTM A182 grade F6b are iron alloys. They have 86% of their average alloy composition in common. There are 31 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 ASTM A231 spring steel and the bottom bar is ASTM A182 grade F6b.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
260
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
18
Fatigue Strength, MPa 1000
440
Poisson's Ratio 0.29
0.28
Reduction in Area, % 46
51
Shear Modulus, GPa 73
76
Shear Strength, MPa 1080
530
Tensile Strength: Ultimate (UTS), MPa 1790
850
Tensile Strength: Yield (Proof), MPa 1570
710

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
750
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.2
Embodied Energy, MJ/kg 28
30
Embodied Water, L/kg 51
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
30
Strength to Weight: Bending, points 42
26
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 53
31

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.15
Chromium (Cr), % 0.8 to 1.1
11.5 to 13.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 96.7 to 97.7
81.2 to 87.1
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.6
Nickel (Ni), % 0
1.0 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020
Vanadium (V), % 0.15 to 0.3
0