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ASTM B817 Type I vs. S40920 Stainless Steel

ASTM B817 type I belongs to the titanium alloys classification, while S40920 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM B817 type I and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 4.0 to 13
22
Fatigue Strength, MPa 360 to 520
130
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
75
Tensile Strength: Ultimate (UTS), MPa 770 to 960
430
Tensile Strength: Yield (Proof), MPa 700 to 860
190

Thermal Properties

Latent Heat of Fusion, J/g 410
270
Maximum Temperature: Mechanical, °C 340
710
Melting Completion (Liquidus), °C 1600
1450
Melting Onset (Solidus), °C 1550
1400
Specific Heat Capacity, J/kg-K 560
480
Thermal Conductivity, W/m-K 7.1
26
Thermal Expansion, µm/m-K 9.6
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 36
6.5
Density, g/cm3 4.4
7.7
Embodied Carbon, kg CO2/kg material 38
2.0
Embodied Energy, MJ/kg 610
28
Embodied Water, L/kg 200
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
78
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
97
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 48 to 60
15
Strength to Weight: Bending, points 42 to 49
16
Thermal Diffusivity, mm2/s 2.9
6.9
Thermal Shock Resistance, points 54 to 68
15

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
10.5 to 11.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
85.1 to 89.4
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.040
0 to 0.030
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 87 to 91
0.15 to 0.5
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0