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EN 1.4971 Stainless Steel vs. Titanium 4-4-2

EN 1.4971 stainless steel belongs to the iron alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is titanium 4-4-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 34
10
Fatigue Strength, MPa 270
590 to 620
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 81
42
Shear Strength, MPa 530
690 to 750
Tensile Strength: Ultimate (UTS), MPa 800
1150 to 1250
Tensile Strength: Yield (Proof), MPa 340
1030 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1100
310
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1410
1560
Specific Heat Capacity, J/kg-K 450
540
Thermal Conductivity, W/m-K 13
6.7
Thermal Expansion, µm/m-K 15
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 70
39
Density, g/cm3 8.4
4.7
Embodied Carbon, kg CO2/kg material 7.6
30
Embodied Energy, MJ/kg 110
480
Embodied Water, L/kg 300
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 280
4700 to 5160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 26
68 to 74
Strength to Weight: Bending, points 23
52 to 55
Thermal Diffusivity, mm2/s 3.4
2.6
Thermal Shock Resistance, points 19
86 to 93

Alloy Composition

Aluminum (Al), % 0
3.0 to 5.0
Carbon (C), % 0.080 to 0.16
0 to 0.080
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 24.3 to 37.1
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 2.5 to 3.5
3.0 to 5.0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0.3 to 0.7
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
85.8 to 92.2
Tungsten (W), % 2.0 to 3.0
0
Residuals, % 0
0 to 0.4