Alloy Grade UNS: HPNb – Contains Niobium

  • 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

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated