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AISI 439 Stainless Steel vs. ACI-ASTM CA28MWV Steel

Both AISI 439 stainless steel and ACI-ASTM CA28MWV steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is ACI-ASTM CA28MWV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
11
Fatigue Strength, MPa 170
470
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
27
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 490
1080
Tensile Strength: Yield (Proof), MPa 250
870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 530
380
Maximum Temperature: Mechanical, °C 890
740
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
4.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
11
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
3.1
Embodied Energy, MJ/kg 34
44
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
110
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
38
Strength to Weight: Bending, points 18
30
Thermal Diffusivity, mm2/s 6.7
6.6
Thermal Shock Resistance, points 16
40

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0.2 to 0.28
Chromium (Cr), % 17 to 19
11 to 12.5
Iron (Fe), % 77.1 to 82.8
81.4 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0 to 0.5
0.5 to 1.0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 1.1
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3