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EN 1.4109 Stainless Steel vs. EN 1.7707 Steel

Both EN 1.4109 stainless steel and EN 1.7707 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 1.7707 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
11
Fatigue Strength, MPa 270
500
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 480
600
Tensile Strength: Ultimate (UTS), MPa 770
1010
Tensile Strength: Yield (Proof), MPa 420
800

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 820
460
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
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
3.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.9
Embodied Energy, MJ/kg 30
27
Embodied Water, L/kg 110
58

Common Calculations

PREN (Pitting Resistance) 17
3.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 460
1690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
36
Strength to Weight: Bending, points 24
29
Thermal Diffusivity, mm2/s 8.1
11
Thermal Shock Resistance, points 28
29

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.26 to 0.34
Chromium (Cr), % 14 to 16
2.3 to 2.7
Iron (Fe), % 80.7 to 85
94.7 to 96.8
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0.4 to 0.8
0.15 to 0.25
Nickel (Ni), % 0
0 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.7
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Vanadium (V), % 0
0.1 to 0.2