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EN 1.3975 Stainless Steel vs. Grade 21 Titanium

EN 1.3975 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3975 stainless steel and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 27
9.0 to 17
Fatigue Strength, MPa 230
550 to 660
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
51
Tensile Strength: Ultimate (UTS), MPa 660
890 to 1340
Tensile Strength: Yield (Proof), MPa 320
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 340
410
Maximum Temperature: Mechanical, °C 910
310
Melting Completion (Liquidus), °C 1360
1740
Melting Onset (Solidus), °C 1320
1690
Specific Heat Capacity, J/kg-K 500
500
Thermal Expansion, µm/m-K 16
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 15
60
Density, g/cm3 7.5
5.4
Embodied Carbon, kg CO2/kg material 3.3
32
Embodied Energy, MJ/kg 47
490
Embodied Water, L/kg 150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 270
2760 to 5010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
32
Strength to Weight: Axial, points 24
46 to 69
Strength to Weight: Bending, points 22
38 to 50
Thermal Shock Resistance, points 15
66 to 100

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.050
0 to 0.050
Chromium (Cr), % 16 to 18
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 58.2 to 65.4
0 to 0.4
Manganese (Mn), % 7.0 to 9.0
0
Molybdenum (Mo), % 0 to 1.0
14 to 16
Nickel (Ni), % 8.0 to 9.0
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0.080 to 0.18
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 3.5 to 4.5
0.15 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
76 to 81.2
Residuals, % 0
0 to 0.4