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Annealed AISI 202 vs. ASTM A387 Grade 12 Class 1

Both annealed AISI 202 and ASTM A387 grade 12 class 1 are iron alloys. Both are furnished in the annealed condition. They have 69% 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 annealed AISI 202 and the bottom bar is ASTM A387 grade 12 class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
25
Fatigue Strength, MPa 290
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 490
300
Tensile Strength: Ultimate (UTS), MPa 700
470
Tensile Strength: Yield (Proof), MPa 310
260

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 910
430
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
44
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 40
21
Embodied Water, L/kg 150
51

Common Calculations

PREN (Pitting Resistance) 20
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 260
98
Resilience: Unit (Modulus of Resilience), kJ/m3 250
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
16
Strength to Weight: Bending, points 23
17
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0 to 0.15
0.050 to 0.17
Chromium (Cr), % 17 to 19
0.8 to 1.2
Iron (Fe), % 63.5 to 71.5
97 to 98.2
Manganese (Mn), % 7.5 to 10
0.4 to 0.65
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025