Overview
HPNb - contains Niobium that improves stress rupture strength and carburization resistance but lowers ductility. The service limit is 2010 degrees Fahrenheit (1100 degrees Celsius). This stainless steel alloy has good tensile strength.
Typical Uses
Petrochemical furnaces, equally well suited for reformer and ethylene furnace applications.
MetalTek Grade
MTEK 25-35Nb
Similar Specifications
Cast ASTM: A297 MOD.
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.35-0.55
Chromium: 23-27
Manganese: 1.5
Iron: BAL
Copper: n/a
Nickel: 32-37
Lead: n/a
Tin: n/a
Silicon: 2
Zinc: n/a
Other: Mo 0.50; Nb 0.60-1.00
Minimum Mechanical Properties
Heat Treatment: Not Heat Treated