Effect of cooper content on the AISI H13 steel

[stanislasdz]

Hi everybody

What is the impact of the cooper content on the AISI H13 steel ? I think the more cooper we have the less the impact toughness will have.

Any data or study on this?

Thanks in advance

 

[metengr]

stanislasdz;
The information below is an excerpt from the "Physical Metallurgy Handbook" by Sinha. The excerpt is on copper addition to steels. I believe after reviewing this you can draw your one conclusion regarding alloy steel (H13);

Copper addition has a moderate tendency to segregate. Copper is usually considered as a detrimental element in steel, being associated with severe hot shortness. Copper raises the ITT by about 22K/wt%, whereas Ni lowers the ITT by an average of 26K/wt% in structural steels. Small additions (e.g., 0.25%) of Cu are beneficial in retarding hydrogen-induced cracking in line pipe grades. Copper above 0.30% can cause precipitation hardening. It increases hardenability of low alloy steels with a potency similar to that of Ni. If present in appreciable amounts, it is detrimental to hot working operations and forge welding, but it has no adverse effect on arc or oxyacetylene welding. Copper is detrimental to surface quality and exaggerates the surface defects inherent in resulfurized steels. Copper, however, improves the atmospheric corrosion resistance of strip and structural steels (when it exists in excess of 0.20%) and the tensile properties in alloy and low-alloy steels, and reportedly helps the adhesion of paint. In acid-resistant high alloy steels, a Cu content above 1% results in improvements in resistance to HCl and H₂SO₄ acids. Copper is a versatile alloy element in the case of austenitic stainless steels where up to 4% Cu additions are incorporated to provide significant benefit to both austenite stability and corrosion resistance in sulfuric acid.