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EN 1.4658 Stainless Steel vs. Grade 4 Titanium

EN 1.4658 stainless steel belongs to the iron alloys classification, while grade 4 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 4 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200
Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 28
17
Fatigue Strength, MPa 530
340
Impact Strength: V-Notched Charpy, J 110
23
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 81
41
Shear Strength, MPa 580
390
Tensile Strength: Ultimate (UTS), MPa 900
640
Tensile Strength: Yield (Proof), MPa 730
530

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
19
Thermal Expansion, µm/m-K 13
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 25
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 4.5
31
Embodied Energy, MJ/kg 61
500
Embodied Water, L/kg 200
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
100
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
1330
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32
40
Strength to Weight: Bending, points 26
37
Thermal Diffusivity, mm2/s 4.3
7.6
Thermal Shock Resistance, points 24
46

Alloy Composition

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 0.5
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 0.050
Oxygen (O), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
98.6 to 100
Residuals, % 0
0 to 0.4