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AISI 439 Stainless Steel vs. EN 1.4938 Stainless Steel

Both AISI 439 stainless steel and EN 1.4938 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 32 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 AISI 439 stainless steel and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
16 to 17
Fatigue Strength, MPa 170
390 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 310
540 to 630
Tensile Strength: Ultimate (UTS), MPa 490
870 to 1030
Tensile Strength: Yield (Proof), MPa 250
640 to 870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 530
390
Maximum Temperature: Mechanical, °C 890
750
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
30
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.3
Embodied Energy, MJ/kg 34
47
Embodied Water, L/kg 120
110

Common Calculations

PREN (Pitting Resistance) 18
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1050 to 1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
31 to 37
Strength to Weight: Bending, points 18
26 to 29
Thermal Diffusivity, mm2/s 6.7
8.1
Thermal Shock Resistance, points 16
30 to 35

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0.080 to 0.15
Chromium (Cr), % 17 to 19
11 to 12.5
Iron (Fe), % 77.1 to 82.8
80.5 to 84.8
Manganese (Mn), % 0 to 1.0
0.4 to 0.9
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0 to 0.5
2.0 to 3.0
Nitrogen (N), % 0 to 0.030
0.020 to 0.040
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0.2 to 1.1
0
Vanadium (V), % 0
0.25 to 0.4