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SAE-AISI 4340M Steel vs. ASTM Grade HG10 MNN Steel

Both SAE-AISI 4340M steel and ASTM grade HG10 MNN steel are iron alloys. They have 66% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is ASTM grade HG10 MNN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
23
Fatigue Strength, MPa 690
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 2340
590
Tensile Strength: Yield (Proof), MPa 1240
250

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 430
990
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
4.0
Embodied Energy, MJ/kg 26
58
Embodied Water, L/kg 55
160

Common Calculations

PREN (Pitting Resistance) 2.2
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
21
Strength to Weight: Bending, points 51
20
Thermal Diffusivity, mm2/s 10
3.9
Thermal Shock Resistance, points 70
13

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.070 to 0.11
Chromium (Cr), % 0.7 to 1.0
18.5 to 20.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 93.3 to 94.8
57.9 to 66.5
Manganese (Mn), % 0.65 to 0.9
3.0 to 5.0
Molybdenum (Mo), % 0.35 to 0.45
0.25 to 0.45
Nickel (Ni), % 1.7 to 2.0
11.5 to 13.5
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.012
0 to 0.040
Silicon (Si), % 1.5 to 1.8
0 to 0.7
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0