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EN 1.4109 Stainless Steel vs. EN 1.7378 Steel

Both EN 1.4109 stainless steel and EN 1.7378 steel are iron alloys. They have 87% of their average alloy composition in common. There are 32 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 EN 1.4109 stainless steel and the bottom bar is EN 1.7378 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
17
Fatigue Strength, MPa 270
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Shear Strength, MPa 480
430
Tensile Strength: Ultimate (UTS), MPa 770
700
Tensile Strength: Yield (Proof), MPa 420
490

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 820
460
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
4.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
2.3
Embodied Energy, MJ/kg 30
33
Embodied Water, L/kg 110
61

Common Calculations

PREN (Pitting Resistance) 17
5.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 460
630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
25
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 8.1
10
Thermal Shock Resistance, points 28
20

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0015 to 0.0070
Carbon (C), % 0.6 to 0.75
0.050 to 0.1
Chromium (Cr), % 14 to 16
2.2 to 2.6
Iron (Fe), % 80.7 to 85
94.6 to 96.1
Manganese (Mn), % 0 to 1.0
0.3 to 0.7
Molybdenum (Mo), % 0.4 to 0.8
0.9 to 1.1
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.7
0.15 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.050 to 0.1
Vanadium (V), % 0
0.2 to 0.3