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17-4PH

17-4PH is a precipitation-hardening martensitic stainless steel grade offering high strength, good corrosion resistance, and excellent mechanical performance. It is widely used for demanding industrial, aerospace, oil and gas, and pressure-related applications.
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17-4 PH is a precipitation hardening stainless steel grade and is a high strength, high hardness, excellent corrosion resistant and easy heat treatable material. It is widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.

S17400 alloy is martensitic in structure in the annealed condition and is further strengthened by a low temperature treatment which precipitates a copper containing phase in the alloy. Comes in several conditions A, H900, H1075 and H1150.

Some of the end use applications are pump shafts, valve stems, balls, gates, bushings and trim: mixing screws, fasteners, couplings, rocket hold-downs, wear rings, rollers, hydraulic actuators, load cells and screws.
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Typical specification data

Technical reference

Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.

Chemical Properties
% C Mn Si P S Cr Ni Cu Nb
min - - - - - 15.00 3.00 3.00 0.15
max 0.07 1.00 1.00 0.040 0.030 17.50 5.00 5.00 0.45
Mechanical Properties
- Tensile Strength Yield Strength (0.2%) Hardness Elongation (2")
min 100 ksi [690 MPa] 40 ksi [275 MPa] - 15%
max - - 46 HRC -
UNS EN WERKSTOFF NR. JIS AFNOR
S17400 X5CrNiCuNb16-4 1.4542 SUS 630 Z6CNU17-04
Additional Specs
Specification Product Type
AMS 5604 Sheet, Strip and Plate
ASTM A693 / ASME SA693 Sheet, Strip and Plate
AMS 5643 Bars, Forgings, Tubing and Rings
ASTM A564 / ASME SA564 Bars, Wire and Shapes
ASTM A705 / ASME SA705 Forgings

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