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ACI-ASTM CN7M Steel vs. EN 1.4825 Stainless Steel

Both ACI-ASTM CN7M steel and EN 1.4825 stainless steel are iron alloys. They have 72% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is EN 1.4825 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
17
Fatigue Strength, MPa 190
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 480
510
Tensile Strength: Yield (Proof), MPa 200
260

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1450
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 32
15
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 5.6
3.1
Embodied Energy, MJ/kg 78
43
Embodied Water, L/kg 210
140

Common Calculations

PREN (Pitting Resistance) 29
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
72
Resilience: Unit (Modulus of Resilience), kJ/m3 110
170
Stiffness to Weight: Axial, points 14
14
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 5.6
4.0
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0 to 0.070
0.15 to 0.35
Chromium (Cr), % 19 to 22
17 to 19
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
65.6 to 74.4
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 27.5 to 30.5
8.0 to 10
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0.5 to 2.5
Sulfur (S), % 0 to 0.040
0 to 0.030