Material Specification Flashcards
What is a standard?
Consensus principles of a professional society for procedures and regulations that are considered a guideline.
What is a specification?
Statement of product attributes
What is code?
Set of laws that cover the making and the use of a product, often enforced by government agencies.
In a plant setting low Carbon materials contain ___________ Carbon
less than 0.3%
In a plant setting medium Carbon materials contain ___________ Carbon
0.3-0.6%
In a plant setting high Carbon materials contain ___________ Carbon
at least 0.6% Carbon but less than 1.5%
Cast irons contain ___________ Carbon
2-6%
What is an alloyed steel?
Low Carbon steel alloyed with another element
Describe American Iron and Steel Institute (AISI) classification number for materials.
The AISI system is based on the chemical composition of the steel.
First 2 letters: major alloy
Last 2 letters: Carbon content
Example: AISI 1045 = Carbon Steel with 0.45% Carbon
Describe the American Society for Testing and Materials (ASTM) classification system.
The specification number provides no information about the material itself
First letter: A = ferrous, B = non-ferrous, E = test material
What does the acronym ISO stand for?
International Organization for Standardization
What is MAWP and MADP?
MAWP - Maximum allowable working pressure
MADP - Maximum allowable design pressure
According to ASTM what 5 things could a component be marked with?
1) Size
2) Wall thickness
3) Schedule designation
4) Material Type
5) Manufacturing ID stamp and heat #
What 9 things can a pipe be marked with?
1) Trademark
2) CSA Specification
3) Pressure test
4) OD
5) Wall thickness
6) Yield strength
7) Process of manufacturing
8) Steel type
9) Heat treatment
What is the purpose of the material test report and what can be found on it?
An MTR is a document used for control, traceability and quality assurance and includes:
1) Chemical composition
2) Specification #
3) Specification grade
4) Tensile strength and yield point
5) Specific testing and heat treatment
6) Dimensions
Batch of material out of a furnace is called a ____________.
Heat
Heat # provides ____________ and __________ analysis.
Chemical, mechanical
What is the difference between a material that has an MTR and a material that does not?
A material without an MTR is not traceable
