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Annealed AISI 304N vs. ASTM A387 Grade 2 Class 1

Both annealed AISI 304N and ASTM A387 grade 2 class 1 are iron alloys. Both are furnished in the annealed condition. 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 (3, in this case) are not shown.

For each property being compared, the top bar is annealed AISI 304N and the bottom bar is ASTM A387 grade 2 class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
25
Fatigue Strength, MPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420
300
Tensile Strength: Ultimate (UTS), MPa 620
470
Tensile Strength: Yield (Proof), MPa 270
260

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 960
420
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
45
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.6
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.0
1.6
Embodied Energy, MJ/kg 43
20
Embodied Water, L/kg 150
50

Common Calculations

PREN (Pitting Resistance) 21
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
98
Resilience: Unit (Modulus of Resilience), kJ/m3 180
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
16
Strength to Weight: Bending, points 21
17
Thermal Diffusivity, mm2/s 4.2
12
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0 to 0.080
0.050 to 0.21
Chromium (Cr), % 18 to 20
0.5 to 0.8
Iron (Fe), % 66.4 to 73.9
97.1 to 98.3
Manganese (Mn), % 0 to 2.0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 8.0 to 10.5
0
Nitrogen (N), % 0.1 to 0.16
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.75
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025