Datasheet

1.4568

17-7 PH®

Brand name	17-7 PH®

Standards

Material No.

1.4568

EN Designation

X7CrNiAl17-7

AISI/SAE

631

UNS

S17700

Description	1.4564 / 17-7PH® is an austenitic chromium-nickel stainless steel with aluminum addition.

Special properties	Excellent fatigue properties, good corrosion resistance, good formability and minimum distortion upon heat treatment. It is easily formed in the annealed condition, hardened to high strength levels by heat treatments to condition CH900, RH950 or TH1050. The exceptional high strength of condition CH900 offers many new advantages where limited ductility and workability are permissible. In its heat treated condition, this alloy provides exceptional mechanical properties at temperatures up to 480 °C.

Special properties

Excellent fatigue properties, good corrosion resistance, good formability and minimum distortion upon heat treatment. It is easily formed in the annealed condition, hardened to high strength levels by heat treatments to condition CH900, RH950 or TH1050. The exceptional high strength of condition CH900 offers many new advantages where limited ductility and workability are permissible. In its heat treated condition, this alloy provides exceptional mechanical properties at temperatures up to 480 °C.

Chemical Composition

C
%

≤ 0.09

Si
≤ %

0.70

Mn
≤ %

1.00

P
≤ %

0.04

S
≤ %

0.015

Cr
%

16.0-18.0

Ni
%

6.50-7.80

Al
%

0.70-1.50

Mechanical Properties 20°C

Hardness HB 30
≤ HB

230

0.2% Yield strength R_p
≥ N/mm²

280

Tensile strength R_m
N/mm²

900-1100

Elongation A₅
≥ %

Modulus of elasticity
kN/mm²

200

Physical Properties 20°C

Density
g/cm³

7.81

Specific heat capacity
J/kg K

500

Thermal conductivity
W/m K

Electrical resistivity
Ω mm²/m

0.8

Suitable welding filler materials	1.4564

Application	Aircraft industry, high strenght corrosion resistant parts

Available forms for 1.4568 / 17-7 PH®

Sheets/Plates

Bars

Wire