MakeItFrom.com
Menu (ESC)

AISI 439 Stainless Steel vs. SAE-AISI A4 Steel

Both AISI 439 stainless steel and SAE-AISI A4 steel are iron alloys. They have 82% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is SAE-AISI A4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 490
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
40
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
3.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 34
24
Embodied Water, L/kg 120
59

Common Calculations

PREN (Pitting Resistance) 18
5.3
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
25 to 73
Strength to Weight: Bending, points 18
23 to 46
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 16
23 to 67

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
1.0 to 1.1
Chromium (Cr), % 17 to 19
0.9 to 2.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 77.1 to 82.8
92 to 95.5
Manganese (Mn), % 0 to 1.0
1.8 to 2.2
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0 to 0.5
0 to 0.3
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 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 1.1
0