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ASTM A229 Spring Steel vs. Grade 361 Molybdenum

ASTM A229 spring steel belongs to the iron alloys classification, while grade 361 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is grade 361 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
310
Elongation at Break, % 14
6.3
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 72
120
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
620
Tensile Strength: Yield (Proof), MPa 1100 to 1230
530

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Specific Heat Capacity, J/kg-K 470
250
Thermal Expansion, µm/m-K 12
7.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
10
Embodied Carbon, kg CO2/kg material 1.4
28
Embodied Energy, MJ/kg 19
330
Embodied Water, L/kg 46
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
37
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
450
Stiffness to Weight: Axial, points 13
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 60 to 67
17
Strength to Weight: Bending, points 40 to 43
16
Thermal Shock Resistance, points 54 to 60
21

Alloy Composition

Carbon (C), % 0.55 to 0.85
0 to 0.010
Iron (Fe), % 97.5 to 99
0 to 0.010
Manganese (Mn), % 0.3 to 1.2
0
Molybdenum (Mo), % 0
99.9 to 100
Nickel (Ni), % 0
0 to 0.0050
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0070
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0 to 0.010
Sulfur (S), % 0 to 0.050
0