MakeItFrom.com
Menu (ESC)

ASTM A387 Grade 21L Class 1 vs. AISI 347 Stainless Steel

Both ASTM A387 grade 21L class 1 and AISI 347 stainless steel are iron alloys. They have 73% 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 21L class 1 and the bottom bar is AISI 347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
34 to 46
Fatigue Strength, MPa 160
220 to 270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310
430 to 460
Tensile Strength: Ultimate (UTS), MPa 500
610 to 690
Tensile Strength: Yield (Proof), MPa 230
240 to 350

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 480
870
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
19
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.6
Embodied Energy, MJ/kg 23
52
Embodied Water, L/kg 62
150

Common Calculations

PREN (Pitting Resistance) 6.4
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
190 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 140
150 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
22 to 25
Strength to Weight: Bending, points 18
20 to 22
Thermal Diffusivity, mm2/s 11
4.3
Thermal Shock Resistance, points 14
13 to 15

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 2.8 to 3.3
17 to 19
Iron (Fe), % 94.4 to 96.1
64.1 to 74
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
9.0 to 13
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030