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ASTM B817 Type I vs. EN 1.4945 Stainless Steel

ASTM B817 type I belongs to the titanium alloys classification, while EN 1.4945 stainless steel belongs to the iron alloys. There are 29 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 ASTM B817 type I and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 4.0 to 13
19 to 34
Fatigue Strength, MPa 360 to 520
230 to 350
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 770 to 960
640 to 740
Tensile Strength: Yield (Proof), MPa 700 to 860
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 340
920
Melting Completion (Liquidus), °C 1600
1490
Melting Onset (Solidus), °C 1550
1440
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
14
Thermal Expansion, µm/m-K 9.6
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 36
30
Density, g/cm3 4.4
8.1
Embodied Carbon, kg CO2/kg material 38
5.0
Embodied Energy, MJ/kg 610
73
Embodied Water, L/kg 200
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 48 to 60
22 to 25
Strength to Weight: Bending, points 42 to 49
20 to 22
Thermal Diffusivity, mm2/s 2.9
3.7
Thermal Shock Resistance, points 54 to 68
14 to 16

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0.040 to 0.1
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
15.5 to 17.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
57.9 to 65.7
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0 to 0.040
0.060 to 0.14
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.1
0.3 to 0.6
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 87 to 91
0
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0