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EN 1.7706 Steel vs. EN 1.4020 Stainless Steel

Both EN 1.7706 steel and EN 1.4020 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.7706 steel and the bottom bar is EN 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
13 to 34
Fatigue Strength, MPa 330
340 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 690
770 to 1130
Tensile Strength: Yield (Proof), MPa 500
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 440
890
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
11
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 2.3
2.5
Embodied Energy, MJ/kg 32
37
Embodied Water, L/kg 57
150

Common Calculations

PREN (Pitting Resistance) 4.7
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 670
460 to 2290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
28 to 41
Strength to Weight: Bending, points 22
25 to 32
Thermal Shock Resistance, points 20
16 to 23

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.15
Chromium (Cr), % 1.2 to 1.5
16.5 to 19
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 94.7 to 97.1
62.8 to 71.8
Manganese (Mn), % 0.5 to 0.9
11 to 14
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0 to 0.4
0.5 to 2.5
Nitrogen (N), % 0
0.2 to 0.45
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.2 to 0.3
0