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ASTM A387 Grade 2 Steel vs. S44725 Stainless Steel

Both ASTM A387 grade 2 steel and S44725 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 32 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 A387 grade 2 steel and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 170
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
22
Fatigue Strength, MPa 190 to 250
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 300 to 350
320
Tensile Strength: Ultimate (UTS), MPa 470 to 550
500
Tensile Strength: Yield (Proof), MPa 260 to 350
310

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
15
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.1
Embodied Energy, MJ/kg 20
44
Embodied Water, L/kg 50
170

Common Calculations

PREN (Pitting Resistance) 2.4
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
99
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
240
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
18
Strength to Weight: Bending, points 17 to 19
18
Thermal Diffusivity, mm2/s 12
4.6
Thermal Shock Resistance, points 14 to 16
16

Alloy Composition

Carbon (C), % 0.050 to 0.21
0 to 0.015
Chromium (Cr), % 0.5 to 0.8
25 to 28.5
Iron (Fe), % 97.1 to 98.3
67.6 to 73.5
Manganese (Mn), % 0.55 to 0.8
0 to 0.4
Molybdenum (Mo), % 0.45 to 0.6
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 0.040
Sulfur (S), % 0 to 0.025
0 to 0.020
Titanium (Ti), % 0
0 to 0.26