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EN 1.4749 Stainless Steel vs. SAE-AISI 1078 Steel

Both EN 1.4749 stainless steel and SAE-AISI 1078 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4749 stainless steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16
11 to 14
Fatigue Strength, MPa 190
270 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
72
Shear Strength, MPa 370
440 to 470
Tensile Strength: Ultimate (UTS), MPa 600
730 to 780
Tensile Strength: Yield (Proof), MPa 320
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 17
49
Thermal Expansion, µm/m-K 9.6
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.4
Embodied Energy, MJ/kg 36
18
Embodied Water, L/kg 160
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 250
490 to 860
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 22
26 to 28
Strength to Weight: Bending, points 21
23 to 24
Thermal Diffusivity, mm2/s 4.6
13
Thermal Shock Resistance, points 22
25 to 26

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.72 to 0.85
Chromium (Cr), % 26 to 29
0
Iron (Fe), % 68.5 to 73.7
98.5 to 99
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0 to 0.050