Old Modules Flashcards
Low carbon steels have a carbon content range of _____________%
0.05%-0.30%
If the carbon range in a steel is 0.15% to 0.30% it is called __________________
mild steel
Medium carbon steels have a carbon content range of _______%
0.30%-0.45%
________ steel has a carbon content range of 0.45%- 0.70%
high carbon steel
_________________ has a carbon content range of 0.75% to1.50%
very high carbon steel
Punches and dies are made from what class of carbon steel?
very high
Axels and connecting rods are made from _____________
medium carbon steel
Structural shapes are made from ________________
low carbon steel
Leaf springs used on automobiles are made from ______________
high carbon steels
In the SAE and AISI number 1025 the number 25 indicates the carbon content in the ___________________
carbon content in hundredths of 1%
Why is preheat necessary in welding of most high carbon steels?
To slow down the cooling rate
Which governing body writes specifications for structural steel shapes and plates?
ASTM
What is indicated by the first digit in the SAE or AISI numbering system?
Class of steel
Which two organizations work closely together in issuing steel specifications for the fabrication for the boilers and pressure vessels?
ASTM and ASME
Which element in carbon steels, in percentages up to about 0.80%, is intended to combine with sulphur to offset embrittlement and hot shortness
manganese
