Stainless Steel Welding Certification
AWS D1.6 Code Test 100 Questions
And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What is the primary purpose of AWS D1.6?
A. To regulate structural design of carbon steel
B. To provide welding requirements for stainless steel structures
C. To provide electrical welding standards
D. To regulate painting of steel
B. To provide welding requirements for stainless steel structures
AWS D1.6 specifically governs welding requirements for stainless steel
structural applications, not carbon steel or painting.
2. Which stainless steel family is most commonly covered under D1.6 for
structural work?
A. Ferritic only
B. Martensitic only
C. Austenitic stainless steels
D. Duplex only
C. Austenitic stainless steels
Austenitic grades (300-series) are the most widely used in structural and
architectural stainless applications because of their weldability and corrosion
resistance.
3. What is the primary alloying element in stainless steel that provides
corrosion resistance?
A. Carbon
B. Nickel
,C. Chromium
D. Manganese
C. Chromium
Chromium forms a passive chromium-oxide layer on the surface that protects
the steel from corrosion. Nickel improves formability and toughness but is not
the primary corrosion-resisting element.
4. Which welding processes are permitted by AWS D1.6?
A. Gas welding only
B. SMAW, GTAW, and GMAW
C. Brazing only
D. Soldering
B. SMAW, GTAW, and GMAW
D1.6 permits common arc welding processes including shielded metal arc
welding, gas tungsten arc welding, and gas metal arc welding.
5. What is the recommended preheat temperature for most austenitic
stainless steels under D1.6?
A. 200–250°F
B. 100–150°F
C. No preheat required
D. 300–350°F
C. No preheat required
Austenitic stainless steels are not susceptible to hydrogen-induced cracking
and generally do not require preheating; excessive preheat can actually
promote carbide precipitation.
6. Which shielding gas is primarily used for GTAW of stainless steel?
A. Oxygen
B. Carbon dioxide
C. Argon
D. Nitrogen
C. Argon
Argon is the preferred inert shielding gas for GTAW on stainless steel because
it prevents oxidation and contamination while providing good arc stability.
, 7. Which filler metal is commonly used for welding 304 stainless steel?
A. ER308L
B. ER70S-6
C. E7018
D. ER4043
A. ER308L
ER308L matches the chemistry of 304 stainless steel and has low carbon
content to minimize sensitization and intergranular corrosion.
8. What phenomenon occurs when chromium carbides precipitate at grain
boundaries in austenitic stainless steel?
A. Galvanic corrosion
B. Sensitization
C. Pitting corrosion
D. Hydrogen embrittlement
B. Sensitization
Sensitization occurs when austenitic stainless steel is held in the 900–1500°F
range, causing chromium carbides to form at grain boundaries and depleting
the adjacent zones of chromium.
9. What is the maximum allowable interpass temperature for 300-series
stainless steel according to D1.6 guidance?
A. 100°C
B. 150°C
C. 200°C
D. 250°C
B. 150°C
Interpass temperature should be kept low (generally below 150°C / 300°F) to
avoid sensitization and carbide precipitation in 300-series stainless steels.
10. Which welding position is defined as vertical-up for plate welding?
A. 1G
B. 2G
C. 3G
D. 4G
C. 3G
AWS D1.6 Code Test 100 Questions
And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What is the primary purpose of AWS D1.6?
A. To regulate structural design of carbon steel
B. To provide welding requirements for stainless steel structures
C. To provide electrical welding standards
D. To regulate painting of steel
B. To provide welding requirements for stainless steel structures
AWS D1.6 specifically governs welding requirements for stainless steel
structural applications, not carbon steel or painting.
2. Which stainless steel family is most commonly covered under D1.6 for
structural work?
A. Ferritic only
B. Martensitic only
C. Austenitic stainless steels
D. Duplex only
C. Austenitic stainless steels
Austenitic grades (300-series) are the most widely used in structural and
architectural stainless applications because of their weldability and corrosion
resistance.
3. What is the primary alloying element in stainless steel that provides
corrosion resistance?
A. Carbon
B. Nickel
,C. Chromium
D. Manganese
C. Chromium
Chromium forms a passive chromium-oxide layer on the surface that protects
the steel from corrosion. Nickel improves formability and toughness but is not
the primary corrosion-resisting element.
4. Which welding processes are permitted by AWS D1.6?
A. Gas welding only
B. SMAW, GTAW, and GMAW
C. Brazing only
D. Soldering
B. SMAW, GTAW, and GMAW
D1.6 permits common arc welding processes including shielded metal arc
welding, gas tungsten arc welding, and gas metal arc welding.
5. What is the recommended preheat temperature for most austenitic
stainless steels under D1.6?
A. 200–250°F
B. 100–150°F
C. No preheat required
D. 300–350°F
C. No preheat required
Austenitic stainless steels are not susceptible to hydrogen-induced cracking
and generally do not require preheating; excessive preheat can actually
promote carbide precipitation.
6. Which shielding gas is primarily used for GTAW of stainless steel?
A. Oxygen
B. Carbon dioxide
C. Argon
D. Nitrogen
C. Argon
Argon is the preferred inert shielding gas for GTAW on stainless steel because
it prevents oxidation and contamination while providing good arc stability.
, 7. Which filler metal is commonly used for welding 304 stainless steel?
A. ER308L
B. ER70S-6
C. E7018
D. ER4043
A. ER308L
ER308L matches the chemistry of 304 stainless steel and has low carbon
content to minimize sensitization and intergranular corrosion.
8. What phenomenon occurs when chromium carbides precipitate at grain
boundaries in austenitic stainless steel?
A. Galvanic corrosion
B. Sensitization
C. Pitting corrosion
D. Hydrogen embrittlement
B. Sensitization
Sensitization occurs when austenitic stainless steel is held in the 900–1500°F
range, causing chromium carbides to form at grain boundaries and depleting
the adjacent zones of chromium.
9. What is the maximum allowable interpass temperature for 300-series
stainless steel according to D1.6 guidance?
A. 100°C
B. 150°C
C. 200°C
D. 250°C
B. 150°C
Interpass temperature should be kept low (generally below 150°C / 300°F) to
avoid sensitization and carbide precipitation in 300-series stainless steels.
10. Which welding position is defined as vertical-up for plate welding?
A. 1G
B. 2G
C. 3G
D. 4G
C. 3G
