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EN 1.4931 Steel vs. AISI 309 Stainless Steel

Both EN 1.4931 steel and AISI 309 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 31 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 EN 1.4931 steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
34 to 47
Fatigue Strength, MPa 410
250 to 280
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 810
600 to 710
Tensile Strength: Yield (Proof), MPa 620
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 600
980
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
16
Thermal Expansion, µm/m-K 14
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
3.6
Embodied Energy, MJ/kg 42
51
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 16
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 970
170 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
21 to 25
Strength to Weight: Bending, points 25
20 to 23
Thermal Diffusivity, mm2/s 6.5
4.3
Thermal Shock Resistance, points 22
14 to 16

Alloy Composition

Carbon (C), % 0.2 to 0.26
0 to 0.2
Chromium (Cr), % 11.3 to 12.2
22 to 24
Iron (Fe), % 83.2 to 86.8
58 to 66
Manganese (Mn), % 0.5 to 0.8
0 to 2.0
Molybdenum (Mo), % 1.0 to 1.2
0
Nickel (Ni), % 0 to 1.0
12 to 15
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0