- UNS Number - BS S162: 1990
- Specification - BS S162
- Form - Forgings, bars and parts
General Information
This British Standard specifies the chemical composition, mechanical properties and inspection and test requirements for an 18 % nickel-cobalt-molybdenum maraging steel (iron base, Ni 18, Co 7.75, Mo 4.9) supplied in the following forms and as parts for general aerospace use:
a) forging stock, designation S 162A, columns 2 and 3 of Table 1;
b) forgings, designation S 162C, columns 4, 5 and 6 of Table 1;
c) black bars for machining, designation S 162B, columns 7, 8 and 9 of Table 1;
d) bright bars for machining, designation S 162D, columns 10, 11 and 12 of Table 1.
Mechanical Properties
Property |
Min Value |
Max Value |
N/mmsq 0.2% Yield Strength |
0 |
0 |
N/mmsq Ultimate Tensile Strength |
1800 |
2000 |
% Elongation |
8 |
0 |
% Reduction of Area |
40 |
0 |
Hardness Rockwell B (HRB) |
0 |
0 |
Hardness Rockwell C (HRC) |
0 |
0 |
Hardness Brinell (BHN) |
0 |
0 |
Hardness Vickers (HV) |
520 |
620 |
Chemical Elements
% Carbon (C) |
0 |
0.010 |
% Chromium (Cr) |
0 |
0.25 |
% Manganese (Mn) |
0 |
0.10 |
% Molybdenum (Mo) |
4.6 |
5.2 |
% Nickel (Ni) |
17.0 |
19.0 |
% Phosphorus (P) |
0 |
0.010 |
% Sulphur (S) |
0 |
0.010 |
% Silicon (Si) |
0 |
0.10 |
% Iron (Fe) |
65.98 |
71.05 |
% Copper |
0 |
0 |
% Magnesium |
0 |
0 |
% Zinc |
0 |
0 |
% Titanium |
0.30 |
0.60 |
% Aluminium |
0.05 |
0.15 |
% Cobalt (Co) |
7.0 |
8.5 |
% Zirconium (Zr) |
0 |
0.02 |
% Boron (B) |
0 |
0.005 |
% Lead (Pb) |
0 |
0 |
% Bismuth (Bi) |
0 |
0 |
% Selenium (Se) |
0 |
0 |