Steel fibre

Steel fibres have not been substituted for asbestos despite their strength and heat resistance, good availability and low cost, due to inadequate corrosion resistance. Steel alloys could solve the corrosion problems but their cost is too high.

The cost of plain carbon steel fibre is in the range of 1.70 to 12.50 $/kg which implies costs between 3 and 23 times those of chrysotile asbestos.

Plain carbon steel fibres have the following properties

Tensile strengt 400 MPa
Young’s modulus 175 GPa
Specific gravity 7.86

Sutinless steel fibres have the following properties

Tensile strength 2100 MPa
Young’s modulus 160 GPa
Diameter 10-330 micrometers
Specific gravity 7.86

Substitutes for asbestos – Marcel Cossette