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S31727 Stainless Steel vs. Grade 6 Titanium

S31727 stainless steel belongs to the iron alloys classification, while grade 6 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is grade 6 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Elongation at Break, % 40
11
Fatigue Strength, MPa 240
290
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
27
Shear Modulus, GPa 78
39
Shear Strength, MPa 430
530
Tensile Strength: Ultimate (UTS), MPa 630
890
Tensile Strength: Yield (Proof), MPa 270
840

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
310
Melting Completion (Liquidus), °C 1440
1580
Melting Onset (Solidus), °C 1390
1530
Specific Heat Capacity, J/kg-K 470
550
Thermal Expansion, µm/m-K 16
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
36
Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 4.7
30
Embodied Energy, MJ/kg 64
480
Embodied Water, L/kg 180
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
92
Resilience: Unit (Modulus of Resilience), kJ/m3 190
3390
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 22
55
Strength to Weight: Bending, points 20
46
Thermal Shock Resistance, points 14
65

Alloy Composition

Aluminum (Al), % 0
4.0 to 6.0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 53.7 to 61.3
0 to 0.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0 to 0.030
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
2.0 to 3.0
Titanium (Ti), % 0
89.8 to 94
Residuals, % 0
0 to 0.4