Alloy Steel

Alloy

Chrome moly grades for high temperature and high pressure service, common in power generation and refinery heater circuits.

Grades

Commonly supplied

P5, P9, P11, P22, P91, F5, F9, F11, F22, F91, B7, B16

UNS: K11597 · K21590 · K90901

Characteristics

Creep strength	Retains strength at elevated temperature where carbon steel cannot
Heat treatment	Normalised and tempered, PWHT usually required after welding
Service	Steam lines, heater tubes, hydrocracker piping
Hardness control	Managed for NACE sour service applications

Product forms

Typical applications

Steam and power piping

Refinery heaters

Boiler systems

High pressure bolting

Technical data

Typical values for reference. Confirm the actual heat against the mill certificate supplied with your order.

Request for quotation

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