Chapter 9 Flashcards
Elements added to steel will alter the composition of the material and contribute and increase specific attributes:
Molybdenum. Vanadium. Manganese.
Molybdenum:
Strength
Vanadium:
Strength and toughness
Manganese:
Resistance of steel to abrasion
One inherent disadvantage of steel is the tendency to?
Rust when exposed to air and moisture
Steel breaks at the?
Ultimate stress
The yield point Stress is reached at approximately?
36,000 PSI
Astm36:
The stress exerted on the steel against the resulting deformation known as the?
Strain
One common structural steel is ASTM a36 which includes?
Manganese, carbon, and silicon
When the___is reached the steel undergoes a pronounced deformation
Yield point stress
A measure of metals ability to be drawn, hammered thin, or rolled into shapes without breaking
Ductility
This steel is used for members that have a thin cross-section, such as flooring roof decking and wall studs. The studs can be used either for interior or non-loadbearing partitions or for exterior bearing walls
Cold rolled steel
Some fires do create temperatures in excess of___which is hot enough to weaken steal to it’s yield point
Excess of 1,200F
The most commonly used SFRM is are mineral fiber or expanded aggregate coatings such as?
Vermiculite and perlite
High density SFRM is that use magnesium oxychloride have densities ranging from?
40 to 80 pounds per cubic foot
