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EN 1.7711 Steel vs. EN 1.4988 Stainless Steel

Both EN 1.7711 steel and EN 1.4988 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.7711 steel and the bottom bar is EN 1.4988 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 280
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16 to 22
34
Fatigue Strength, MPa 290 to 520
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 440 to 570
430
Tensile Strength: Ultimate (UTS), MPa 690 to 930
640
Tensile Strength: Yield (Proof), MPa 400 to 800
290

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
920
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 33
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
23
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.3
6.0
Embodied Energy, MJ/kg 32
89
Embodied Water, L/kg 54
150

Common Calculations

PREN (Pitting Resistance) 2.9
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 140
180
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1690
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 33
23
Strength to Weight: Bending, points 22 to 27
21
Thermal Diffusivity, mm2/s 8.9
4.0
Thermal Shock Resistance, points 24 to 32
14

Alloy Composition

Aluminum (Al), % 0 to 0.015
0
Carbon (C), % 0.36 to 0.44
0.040 to 0.1
Chromium (Cr), % 0.9 to 1.2
15.5 to 17.5
Iron (Fe), % 96 to 97.5
62.1 to 69.5
Manganese (Mn), % 0.45 to 0.85
0 to 1.5
Molybdenum (Mo), % 0.5 to 0.65
1.1 to 1.5
Nickel (Ni), % 0
12.5 to 14.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.4
0.3 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.25 to 0.35
0.6 to 0.85