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EN 1.1221 Steel vs. EN 1.7767 Steel

Both EN 1.1221 steel and EN 1.7767 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 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 1.1221 steel and the bottom bar is EN 1.7767 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
20
Fatigue Strength, MPa 240 to 340
320 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
74
Shear Strength, MPa 450 to 520
420 to 430
Tensile Strength: Ultimate (UTS), MPa 730 to 870
670 to 690
Tensile Strength: Yield (Proof), MPa 390 to 550
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
480
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
4.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
2.4
Embodied Energy, MJ/kg 19
33
Embodied Water, L/kg 47
64

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
24
Strength to Weight: Bending, points 23 to 26
22
Thermal Diffusivity, mm2/s 13
11
Thermal Shock Resistance, points 23 to 28
19 to 20

Alloy Composition

Carbon (C), % 0.57 to 0.65
0.1 to 0.15
Chromium (Cr), % 0 to 0.4
2.8 to 3.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 97.1 to 98.8
93.8 to 95.8
Manganese (Mn), % 0.6 to 0.9
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.1
0.9 to 1.1
Nickel (Ni), % 0 to 0.4
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 0.4
0 to 0.15
Sulfur (S), % 0 to 0.035
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.2 to 0.3

Comparable Variants