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ASTM B817 Type II vs. EN 1.3940 Stainless Steel

ASTM B817 type II belongs to the titanium alloys classification, while EN 1.3940 stainless steel belongs to the iron alloys. There are 25 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 ASTM B817 type II and the bottom bar is EN 1.3940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 3.0 to 13
34
Fatigue Strength, MPa 390 to 530
190
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 900 to 960
540
Tensile Strength: Yield (Proof), MPa 780 to 900
240

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 350
930
Melting Completion (Liquidus), °C 1580
1420
Melting Onset (Solidus), °C 1530
1380
Specific Heat Capacity, J/kg-K 550
480
Thermal Expansion, µm/m-K 9.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 37
17
Density, g/cm3 4.6
7.8
Embodied Carbon, kg CO2/kg material 40
3.3
Embodied Energy, MJ/kg 650
47
Embodied Water, L/kg 220
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
150
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
25
Strength to Weight: Axial, points 55 to 58
19
Strength to Weight: Bending, points 45 to 47
19
Thermal Shock Resistance, points 62 to 66
16

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
16.5 to 18.5
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
64.2 to 71.4
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
12 to 14
Nitrogen (N), % 0 to 0.040
0.1 to 0.2
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.1
0 to 1.0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0