Introduction

17-4PH is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600°F (316°C), good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling. This versatile material is widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.

Characters

The corrosion resistance of 17-4PH is comparable to 304 stainless steel in most environments and is generally superior to the 400 series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required.

Alloy 17-4PH can be easily welded and processed by standard shop fabrication practices. It is magnetic.

Applications

l Aerospace—structural and parts

l Biomedical—hand tools

l Chemical Processing

l Food Process Equipment

l Gate Valves

l Mechanical Components

l Nuclear Waste Processing and Storage

l Oil and Gas Production—foils, helicopter deck platforms, etc.

l Pulp and Paper—paper mill equipment

l Fishing devices

Equal grades

630,SUS630,0Cr17Ni4Cu4Nb,DIN 1.4542,UNS S17400

Chemical composition (%)

C: ≤0.07

Mn: ≤1.00

Si: ≤1.00

Cr: 15.5~17.5

Ni: 3.0~5.0

P: ≤0.04

S: ≤0.03

Cu: 3.0~5.0

Nb+Ta: 0.15~0.45

Standards

ASTM A693 Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

ASTM A564 Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes

Forms available at A-one Alloy

Bar, plate, sheet, strip, seamless pipe, forging

Delivery

Plenty of bars in stock. Strip could be delivered within 2 weeks. For other products please contact A-one Alloy for confirmation.