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EN 1.4658 Stainless Steel vs. Grade 7 Titanium

EN 1.4658 stainless steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 28 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 1.4658 stainless steel and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
150
Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 28
24
Fatigue Strength, MPa 530
250
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 81
38
Shear Strength, MPa 580
270
Tensile Strength: Ultimate (UTS), MPa 900
420
Tensile Strength: Yield (Proof), MPa 730
340

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 1100
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 16
22
Thermal Expansion, µm/m-K 13
9.2

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 4.5
47
Embodied Energy, MJ/kg 61
800
Embodied Water, L/kg 200
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
95
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
560
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32
26
Strength to Weight: Bending, points 26
28
Thermal Diffusivity, mm2/s 4.3
8.9
Thermal Shock Resistance, points 24
31

Alloy Composition


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Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 50.9 to 63.7
0 to 0.3
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 5.5 to 9.5
0
Nitrogen (N), % 0.3 to 0.5
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4