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ASTM A369 Grade FP12 vs. S44725 Stainless Steel

Both ASTM A369 grade FP12 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 A369 grade FP12 and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
22
Fatigue Strength, MPa 170
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 300
320
Tensile Strength: Ultimate (UTS), MPa 470
500
Tensile Strength: Yield (Proof), MPa 250
310

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
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 7.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
15
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.1
Embodied Energy, MJ/kg 21
44
Embodied Water, L/kg 52
170

Common Calculations

PREN (Pitting Resistance) 2.8
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
99
Resilience: Unit (Modulus of Resilience), kJ/m3 160
240
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 12
4.6
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.015
Chromium (Cr), % 0.8 to 1.3
25 to 28.5
Iron (Fe), % 96.8 to 98.4
67.6 to 73.5
Manganese (Mn), % 0.3 to 0.61
0 to 0.4
Molybdenum (Mo), % 0.44 to 0.65
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 to 0.5
0 to 0.040
Sulfur (S), % 0 to 0.025
0 to 0.020
Titanium (Ti), % 0
0 to 0.26