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ASTM A387 Grade 21 Steel vs. EN 1.4525 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4525 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 30 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 ASTM A387 grade 21 steel and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
5.6 to 13
Fatigue Strength, MPa 160 to 250
480 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1030 to 1250
Tensile Strength: Yield (Proof), MPa 230 to 350
840 to 1120

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
860
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
18
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
13
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.8
Embodied Energy, MJ/kg 23
39
Embodied Water, L/kg 62
130

Common Calculations

PREN (Pitting Resistance) 6.4
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
68 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
1820 to 3230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
36 to 45
Strength to Weight: Bending, points 18 to 20
29 to 33
Thermal Diffusivity, mm2/s 11
4.7
Thermal Shock Resistance, points 14 to 17
34 to 41

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.070
Chromium (Cr), % 2.8 to 3.3
15 to 17
Copper (Cu), % 0
2.5 to 4.0
Iron (Fe), % 94.4 to 96
70.4 to 79
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.8
Nickel (Ni), % 0
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.025

Comparable Variants