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EN 1.4931 Steel vs. AISI 439 Stainless Steel

Both EN 1.4931 steel and AISI 439 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.4931 steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
23
Fatigue Strength, MPa 410
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 810
490
Tensile Strength: Yield (Proof), MPa 620
250

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
890
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
25
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.9
2.3
Embodied Energy, MJ/kg 42
34
Embodied Water, L/kg 100
120

Common Calculations

PREN (Pitting Resistance) 16
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
95
Resilience: Unit (Modulus of Resilience), kJ/m3 970
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 25
18
Thermal Diffusivity, mm2/s 6.5
6.7
Thermal Shock Resistance, points 22
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0.2 to 0.26
0 to 0.030
Chromium (Cr), % 11.3 to 12.2
17 to 19
Iron (Fe), % 83.2 to 86.8
77.1 to 82.8
Manganese (Mn), % 0.5 to 0.8
0 to 1.0
Molybdenum (Mo), % 1.0 to 1.2
0
Nickel (Ni), % 0 to 1.0
0 to 0.5
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0