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• UNS Number - UNS S44004
• Specification - AMS 5618
• Form - Bars, Wire, and Forgings

General Information

This specification covers a premium aircraft-quality corrosion-resistant steel in the form of bars, wire,
forgings, and forging stock.

Mechanical Properties

Property	Min Value	Max Value
N/mmsq 0.2% Yield Strength	0	0
N/mmsq Ultimate Tensile Strength	0	0
% Elongation	0	0
% Reduction of Area	0	0
Hardness Rockwell B (HRB)	0	255
Hardness Rockwell C (HRC)	0	0
Hardness Brinell (BHN)	0	0
Hardness Vickers (HV)	0	0

Chemical Elements

% Carbon (C)	0.95	1.20
% Chromium (Cr)	16.00	18.00
% Manganese (Mn)	0	1.00
% Molybdenum (Mo)	0.40	0.65
% Nickel (Ni)	0	0.75
% Phosphorus (P)	0	0.020
% Sulphur (S)	0	0.010
% Silicon (Si)	0	1.00
% Iron (Fe)	76.87	82.65
% Copper	0	0.50
% Magnesium	0	0
% Zinc	0	0
% Titanium	0	0
% Aluminium	0	0
% Cobalt (Co)	0	0
% Zirconium (Zr)	0	0
% Boron (B)	0	0
% Lead (Pb)	0	0
% Bismuth (Bi)	0	0
% Selenium (Se)	0	0