Section II Definitions

Question 1

austenitic

Answer 1

type of metallurgical structure (austenite) found in 300 series stainless steel (SS) and nickel-based alloys

face centered cubic crystallographic structure / Non magnetic

Question 2

diethanolamine DEA
diglycolamine DGA
methyl diethanolamine MDEA
monoethanolamine MEA

• Chemical used in amine treating to remove

Answer 2

H2S and CO2 from hydrocarbon streams.

Question 3

carbon steel
An alloy consisting primarily of _____ with a small amount of _____. Carbon steels do not have alloying elements intentionally added.

Answer 3

iron (Fe) / carbon (C)

Question 4

ferritic

Answer 4

type of metallurgical structure (ferrite) normally found in carbon and low-alloy steels and many 400 series SS.

body centered cubic crystallographic structure / Magnetic

Question 5

high-strength low-alloy steel

Answer 5

(1) higher strength levels are achieved by the addition of moderate amounts of alloying elements such as titanium, vanadium, or niobium in amounts of less than 0.1 %.
(2) They can be more sensitive to cracking during fabrication from hydrogen embrittlement

Question 6

nickel-based

A family of alloys containing nickel as a major alloying element (>_______ % Ni)

Answer 6

30

Question 7

low-alloy steel

Answer 7

(1) considered ferritic steels

(2) containing up to 9 % chromium and other alloying additions for high temperature strength and creep resistance.

Question 8

martensitic

Answer 8

(1)normally found in some 400 series SS

Question 9

stainless steel

Answer 9

(1) alloy of iron (Fe) with at least 10.5 % chromium (Cr)

(2) four major categories of stainless steels : austenitic, ferritic, martensitic, and duplex.

Question 10

duplex stainless steel

Answer 10

contain a mixed austenitic-ferritic structure including