S21800 Stainless Steel vs. EN 1.1061 Steel

Both S21800 stainless steel and EN 1.1061 steel are iron alloys. They have 63% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is EN 1.1061 steel.

UNS S21800 (Alloy 218) Stainless Steel EN 1.1061 (C45RC) Non-Alloy Steel

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness		210
Brinell Hardness		150 to 180

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		75
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		740
Tensile Strength: Ultimate (UTS), MPa		530 to 1810

Thermal Properties

Latent Heat of Fusion, J/g		340
Latent Heat of Fusion, J/g		250

Maximum Temperature: Mechanical, °C		900
Maximum Temperature: Mechanical, °C		400

Melting Completion (Liquidus), °C		1360
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1310
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		500
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		15
Base Metal Price, % relative		1.8

Density, g/cm³		7.5
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		3.1
Embodied Carbon, kg CO₂/kg material		1.4

Embodied Energy, MJ/kg		45
Embodied Energy, MJ/kg		19

Embodied Water, L/kg		150
Embodied Water, L/kg		46

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		26
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		27
Strength to Weight: Axial, points		19 to 64

Strength to Weight: Bending, points		24
Strength to Weight: Bending, points		19 to 42

Thermal Shock Resistance, points		17
Thermal Shock Resistance, points		17 to 58

Alloy Composition

Carbon (C), %		0 to 0.1
Carbon (C), %		0.42 to 0.5

Chromium (Cr), %		16 to 18
Chromium (Cr), %		0

Copper (Cu), %		0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		59.1 to 65.4
Iron (Fe), %		98.1 to 99.06

Manganese (Mn), %		7.0 to 9.0
Manganese (Mn), %		0.5 to 0.8

Nickel (Ni), %		8.0 to 9.0
Nickel (Ni), %		0

Nitrogen (N), %		0.080 to 0.18
Nitrogen (N), %		0

Phosphorus (P), %		0 to 0.060
Phosphorus (P), %		0 to 0.025

Silicon (Si), %		3.5 to 4.5
Silicon (Si), %		0 to 0.3

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0.020 to 0.035