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ASTM Grade HE Steel vs. ASTM A369 Grade FP21

Both ASTM grade HE steel and ASTM A369 grade FP21 are iron alloys. They have 64% 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 ASTM grade HE steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 10
20
Fatigue Strength, MPa 160
160
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
74
Tensile Strength: Ultimate (UTS), MPa 670
470
Tensile Strength: Yield (Proof), MPa 310
240

Thermal Properties

Latent Heat of Fusion, J/g 310
260
Maximum Temperature: Mechanical, °C 1100
470
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1360
1430
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 14
41
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
4.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.5
1.8
Embodied Energy, MJ/kg 50
23
Embodied Water, L/kg 190
61

Common Calculations

PREN (Pitting Resistance) 29
6.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
80
Resilience: Unit (Modulus of Resilience), kJ/m3 240
150
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
17
Thermal Diffusivity, mm2/s 3.6
11
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.050 to 0.15
Chromium (Cr), % 26 to 30
2.7 to 3.4
Iron (Fe), % 53.9 to 65.8
94.3 to 96.2
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.8 to 1.1
Nickel (Ni), % 8.0 to 11
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.025