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SAE-AISI 9255 Steel vs. EN 1.4945 Stainless Steel

Both SAE-AISI 9255 steel and EN 1.4945 stainless steel are iron alloys. They have 63% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9255 steel and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
19 to 34
Fatigue Strength, MPa 270
230 to 350
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 430
430 to 460
Tensile Strength: Ultimate (UTS), MPa 680
640 to 740
Tensile Strength: Yield (Proof), MPa 390
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 400
920
Melting Completion (Liquidus), °C 1430
1490
Melting Onset (Solidus), °C 1390
1440
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 46
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
30
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 1.5
5.0
Embodied Energy, MJ/kg 20
73
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 400
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
22 to 25
Strength to Weight: Bending, points 22
20 to 22
Thermal Diffusivity, mm2/s 13
3.7
Thermal Shock Resistance, points 21
14 to 16

Alloy Composition

Carbon (C), % 0.51 to 0.59
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Iron (Fe), % 96.2 to 97
57.9 to 65.7
Manganese (Mn), % 0.7 to 1.0
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 1.8 to 2.2
0.3 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5