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ASTM B817 Type II vs. AISI 409 Stainless Steel

ASTM B817 type II belongs to the titanium alloys classification, while AISI 409 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 AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 3.0 to 13
24
Fatigue Strength, MPa 390 to 530
140
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
75
Tensile Strength: Ultimate (UTS), MPa 900 to 960
420
Tensile Strength: Yield (Proof), MPa 780 to 900
200

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 350
710
Melting Completion (Liquidus), °C 1580
1450
Melting Onset (Solidus), °C 1530
1400
Specific Heat Capacity, J/kg-K 550
480
Thermal Expansion, µm/m-K 9.9
11

Otherwise Unclassified Properties

Base Metal Price, % relative 37
6.5
Density, g/cm3 4.6
7.7
Embodied Carbon, kg CO2/kg material 40
2.0
Embodied Energy, MJ/kg 650
28
Embodied Water, L/kg 220
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
83
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
25
Strength to Weight: Axial, points 55 to 58
15
Strength to Weight: Bending, points 45 to 47
16
Thermal Shock Resistance, points 62 to 66
15

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.080
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
10.5 to 11.7
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
84.9 to 89.5
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
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 0.030
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0 to 0.75
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0