API RP 571 Damage Mechanisms
Exam Actual Questions and Answers
2026
3.1.1 Austenitic -
correct answer ✅a term that refers to a type of metallurgical
structure (austenite) normally found in
300 Series stainless steels and nickel base alloys.
3.1.2 Austenitic stainless steels -
correct answer ✅the 300 Series stainless steels including Types
304, 304L, 304H,
309, 310, 316, 316L, 316H, 321, 321H, 347, and 347H. The "L" and
"H" suffixes refer to controlled
ranges of low and high carbon content, respectively. These alloys
are characterized by an austenitic
structure.
3.1.3 Carbon steel -
correct answer ✅steels that do not have alloying elements
intentionally added. However, there
may be small amounts of elements permitted by specifications such
as SA516 and SA106, for example
that can affect corrosion resistance, hardness after welding, and
toughness. Elements which may be
,API RP 571 Damage Mechanisms
Exam Actual Questions and Answers
2026
found in small quantities include Cr, Ni, Mo, Cu, S, Si, P, Al, V and B.
3.1.4 Diethanolamine (DEA) -
correct answer ✅used in amine treating to remove H2S and CO2
from hydrocarbon
3.1.5 Duplex stainless steel -
correct answer ✅a family of stainless steels that contain a mixed
austenitic-ferritic
structure including Alloy 2205, 2304, and 2507. The welds of 300
series stainless steels may also exhibit
a duplex structure.
3.1.6 Ferritic -
correct answer ✅a term that refers to a type of metallurgical
structure (ferrite) normally found in carbon
and low alloy steels and many 400 series stainless steels.
3.1.7 Ferritic stainless steels -
correct answer ✅include Types 405, 409, 430, 442, and 446.
, API RP 571 Damage Mechanisms
Exam Actual Questions and Answers
2026
3.1.8 Heat Affected Zone (HAZ) -
correct answer ✅the portion of the base metal adjacent to a weld
which has not
been melted, but the metallurgical microstructure and mechanical
properties have been changed by the
heat of welding, sometimes with undesirable effects.
3.1.9 High Strenth low Alloy Steels (HSLA) -
correct answer ✅A family of low-carbon steels in which the
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 per cent. They can be are
more sensitive to cracking during
fabrication from hydrogen embrittlement (delayed cracking) or
underbead cracking.
3.1.10 Hydrogen Induced Cracking (HIC) -
correct answer ✅describes stepwise internal cracks that connect
adjacent
Exam Actual Questions and Answers
2026
3.1.1 Austenitic -
correct answer ✅a term that refers to a type of metallurgical
structure (austenite) normally found in
300 Series stainless steels and nickel base alloys.
3.1.2 Austenitic stainless steels -
correct answer ✅the 300 Series stainless steels including Types
304, 304L, 304H,
309, 310, 316, 316L, 316H, 321, 321H, 347, and 347H. The "L" and
"H" suffixes refer to controlled
ranges of low and high carbon content, respectively. These alloys
are characterized by an austenitic
structure.
3.1.3 Carbon steel -
correct answer ✅steels that do not have alloying elements
intentionally added. However, there
may be small amounts of elements permitted by specifications such
as SA516 and SA106, for example
that can affect corrosion resistance, hardness after welding, and
toughness. Elements which may be
,API RP 571 Damage Mechanisms
Exam Actual Questions and Answers
2026
found in small quantities include Cr, Ni, Mo, Cu, S, Si, P, Al, V and B.
3.1.4 Diethanolamine (DEA) -
correct answer ✅used in amine treating to remove H2S and CO2
from hydrocarbon
3.1.5 Duplex stainless steel -
correct answer ✅a family of stainless steels that contain a mixed
austenitic-ferritic
structure including Alloy 2205, 2304, and 2507. The welds of 300
series stainless steels may also exhibit
a duplex structure.
3.1.6 Ferritic -
correct answer ✅a term that refers to a type of metallurgical
structure (ferrite) normally found in carbon
and low alloy steels and many 400 series stainless steels.
3.1.7 Ferritic stainless steels -
correct answer ✅include Types 405, 409, 430, 442, and 446.
, API RP 571 Damage Mechanisms
Exam Actual Questions and Answers
2026
3.1.8 Heat Affected Zone (HAZ) -
correct answer ✅the portion of the base metal adjacent to a weld
which has not
been melted, but the metallurgical microstructure and mechanical
properties have been changed by the
heat of welding, sometimes with undesirable effects.
3.1.9 High Strenth low Alloy Steels (HSLA) -
correct answer ✅A family of low-carbon steels in which the
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 per cent. They can be are
more sensitive to cracking during
fabrication from hydrogen embrittlement (delayed cracking) or
underbead cracking.
3.1.10 Hydrogen Induced Cracking (HIC) -
correct answer ✅describes stepwise internal cracks that connect
adjacent
