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Steel, Corrosion Resistant

17Cr - 0.52Mo (0.95 - 1.20C) (SAE 51440C), Consumable Electrode Vacuum Melted

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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