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ASTM B817 Type I vs. N08020 Stainless Steel

ASTM B817 type I belongs to the titanium alloys classification, while N08020 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM B817 type I and the bottom bar is N08020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 4.0 to 13
15 to 34
Fatigue Strength, MPa 360 to 520
210 to 240
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 770 to 960
610 to 620
Tensile Strength: Yield (Proof), MPa 700 to 860
270 to 420

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 340
1100
Melting Completion (Liquidus), °C 1600
1410
Melting Onset (Solidus), °C 1550
1360
Specific Heat Capacity, J/kg-K 560
460
Thermal Conductivity, W/m-K 7.1
12
Thermal Expansion, µm/m-K 9.6
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 36
38
Density, g/cm3 4.4
8.2
Embodied Carbon, kg CO2/kg material 38
6.6
Embodied Energy, MJ/kg 610
92
Embodied Water, L/kg 200
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
83 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
180 to 440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 48 to 60
21
Strength to Weight: Bending, points 42 to 49
20
Thermal Diffusivity, mm2/s 2.9
3.2
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 0.070
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 0
3.0 to 4.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
29.9 to 44
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
32 to 38
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.035
Titanium (Ti), % 87 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0