- UNS Number - BS 3S145 : 1996
- Specification - BS S145
- Form - billets, bars, forgings and parts
General Information
This British Standard specifies characteristics of a
chromium-nickel-copper-molybdenum corrosion
resisting steel supplied in the following forms, and as
parts, for general aerospace use:
a) forging stock and billets and bars for
subsequent working: softened, designation S145A;
b) forgings: solution treated, designation S145C;
c) forgings: solution treated and precipitated,
designation S145G;
d) black bar for machining: solution treated,
designation S145B;
e) black bar for machining: solution treated and
precipitated, designation S145F;
f) bright bar for machining: solution treated,
designation S145D;
g) bright bar for machining: solution treated and
precipitated, designation S145H.
Mechanical Properties
| Property |
Min Value |
Max Value |
| N/mmsq 0.2% Yield Strength |
0 |
1030 |
| N/mmsq Ultimate Tensile Strength |
1270 |
1470 |
| % Elongation |
0 |
10 |
| % Reduction of Area |
0 |
0 |
| Hardness Rockwell B (HRB) |
0 |
0 |
| Hardness Rockwell C (HRC) |
0 |
0 |
| Hardness Brinell (BHN) |
375 |
429 |
| Hardness Vickers (HV) |
400 |
455 |
Chemical Elements
| % Carbon (C) |
0 |
0.07 |
| % Chromium (Cr) |
13.2 |
14.7 |
| % Manganese (Mn) |
0 |
1.00 |
| % Molybdenum (Mo) |
1.20 |
2.00 |
| % Nickel (Ni) |
5.0 |
5.8 |
| % Phosphorus (P) |
0 |
0.035 |
| % Sulphur (S) |
0 |
0.025 |
| % Silicon (Si) |
0 |
0.60 |
| % Iron (Fe) |
73.37 |
79.3 |
| % Copper |
1.20 |
2.00 |
| % 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 |
