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AISI 439 Stainless Steel vs. ASTM A36 Carbon Steel

Both AISI 439 stainless steel and ASTM A36 carbon steel are iron alloys. They have 80% of their average alloy composition in common. There are 31 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 AISI 439 stainless steel and the bottom bar is ASTM A36 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
22
Fatigue Strength, MPa 170
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 310
300
Tensile Strength: Ultimate (UTS), MPa 490
480
Tensile Strength: Yield (Proof), MPa 250
290

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
50
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
12
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
14

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 34
18
Embodied Water, L/kg 120
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
92
Resilience: Unit (Modulus of Resilience), kJ/m3 160
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
17
Strength to Weight: Bending, points 18
17
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 16
16

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.26
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 77.1 to 82.8
99.25 to 100
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.050
Titanium (Ti), % 0.2 to 1.1
0