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ASTM A231 Spring Steel vs. R58150 Titanium

ASTM A231 spring steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 26 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 R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 14
13
Fatigue Strength, MPa 1000
330
Poisson's Ratio 0.29
0.32
Reduction in Area, % 46
68
Shear Modulus, GPa 73
52
Shear Strength, MPa 1080
470
Tensile Strength: Ultimate (UTS), MPa 1790
770
Tensile Strength: Yield (Proof), MPa 1570
550

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 420
320
Melting Completion (Liquidus), °C 1460
1760
Melting Onset (Solidus), °C 1410
1700
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
48
Density, g/cm3 7.8
5.4
Embodied Carbon, kg CO2/kg material 2.0
31
Embodied Energy, MJ/kg 28
480
Embodied Water, L/kg 51
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
94
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 64
40
Strength to Weight: Bending, points 42
35
Thermal Shock Resistance, points 53
48

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.1
Chromium (Cr), % 0.8 to 1.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 96.7 to 97.7
0 to 0.1
Manganese (Mn), % 0.7 to 0.9
0
Molybdenum (Mo), % 0
14 to 16
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
83.5 to 86
Vanadium (V), % 0.15 to 0.3
0