Examination Materials

Fill the following blanks 1.The useful impurity elements in carbon steel are ( ), the harmful elements are ( ). 2.The common heat treatments of steel are ( ),( ), ( ). 3.The pressure vessels are classified as ( )( )( )( ) ( )according to the grades of pressure.

4.For iron based steel,the yielding stressσs is getting ( ), and the elastic modulus E is getting ( ) when the temperature is becoming higher. 5. The value of Poison’s ratio of steel () is ( ). 6. The mechanical properties of metal materials are ( ),( ), ( ) and ( ). 7Usual failure forms are respectively ( ) for an internal pressure vessel,( ) for an external pressure vessel,and ( ) for a flanged joint.

The impurity elements S,P may make respectively carbon steel ( ) brittleness, ( ) brittleness. Plastics is the ability of deformation without ( ) when a force act on the material. The strength properties of a material, such as ( ), ( ), and the plasticity properties,such as ( ),( ), have significant influences on its selection for a given application.

The material of 0Cr13 is ( ) steel, its contents of carbon is ( ). Selecting materials mainly depends on four kinds of mechanical properties.They are ( ),( ), ( ),and ( ).

Explain the meanings of each designation 1Cr18Ni9TiStainless Steel 1—0.1%(C),18—18%(Cr), 9—9%(Ni) QT450—5 2Cr g 18MnMoNbR

Answer following question How to make a steel stick softer? Give two methods to decrease the thermal tresses in fixed-tubesheet heat exchanger. Write a typical steel’s Number according following requirement and point out the meaning of each number and alphabet. high carbon steel medium carbon steel

low carbon steel common carbon steel high grade steel super high grade steel boiling steel full killed steel semi-killed steel pressure vessel steel boiler steel

high silicon cast iron grey cast iron spherical graphite cast iron Stainless steel Chromium Stainless Steel Chromium-nickel Stainless Steel Low alloy steel alloy steel Heat-resisting Steel high temperature steel low temperature steel