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EN 1.7390 Steel vs. EN 1.4371 Stainless Steel

Both EN 1.7390 steel and EN 1.4371 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 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 1.7390 steel and the bottom bar is EN 1.4371 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
45 to 51
Fatigue Strength, MPa 310
290 to 340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 440
520 to 540
Tensile Strength: Ultimate (UTS), MPa 710
740 to 750
Tensile Strength: Yield (Proof), MPa 480
320 to 340

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 510
880
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.6
Embodied Energy, MJ/kg 23
38
Embodied Water, L/kg 69
140

Common Calculations

PREN (Pitting Resistance) 6.8
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
270 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 600
250 to 300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
27
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 20
16

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.030
Chromium (Cr), % 4.0 to 6.0
16 to 17.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 91.9 to 95.3
66.7 to 74.4
Manganese (Mn), % 0.3 to 0.8
6.0 to 8.0
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015