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EN 1.1221 Steel vs. ASTM Grade HT Steel

Both EN 1.1221 steel and ASTM grade HT steel are iron alloys. They have 47% of their average alloy composition in common. There are 30 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 1.1221 steel and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
4.6
Fatigue Strength, MPa 240 to 340
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 730 to 870
500
Tensile Strength: Yield (Proof), MPa 390 to 550
270

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1010
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1410
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 48
12
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.4
Embodied Energy, MJ/kg 19
76
Embodied Water, L/kg 47
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
19
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
18
Strength to Weight: Bending, points 23 to 26
18
Thermal Diffusivity, mm2/s 13
3.2
Thermal Shock Resistance, points 23 to 28
12

Alloy Composition

Carbon (C), % 0.57 to 0.65
0.35 to 0.75
Chromium (Cr), % 0 to 0.4
15 to 19
Iron (Fe), % 97.1 to 98.8
38.2 to 51.7
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Molybdenum (Mo), % 0 to 0.1
0 to 0.5
Nickel (Ni), % 0 to 0.4
33 to 37
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 2.5
Sulfur (S), % 0 to 0.035
0 to 0.040