BS TA 39:1971 pdf download.Forging stock of titanium -a lumin ium- molybdenum-tin- silicon-carbon alloy.
1 Inspection and testing procedure
This British Standard shall be used in conjunctionwith Sections 1 and 3 of BS TA 100.
2 Manufacture
The material shall be made from ingots produced byconsumable electrode melting.
4 Condition
4.1 The material shall be supplied as-forged, hot rolled or extruded and may be stress relieved at the discretion of the manufacturer.
NOTE Stress relieving is achieved by heating the material uniformly for not more than 3 h at a temperature between 600 °C and 700 °C.
4.2 Unless otherwise stated on the order or Inspection Schedule, the material shall be supplied
either centreless ground or machined.
5 Heat treatment
Test samples taken from the material shall be heat treated as follows:
1) heat at a temperature of 900土10 °C and hold for one hour per 25 mm of section, with a
minimum of 20 min;
2) cool in air;
3) heat at a temperature of 500士5 °C and hold for 24 h;
4) cool in air.
6 Mechanical properties
6.1 Tensile test. The mechanical properties obtained from test pieces selected, prepared and
tested in accordance with the relevant requirements of BS TA 100 shall be:BS TA 39 pdf download.