AWS Classifcation System

Question 1

Breakdown each part of the electrode E6027. (AWS)

Answer 1

E: designates an electrode

60: designates the minimum as-welded tensile strength of the weld metal in increments of 1000 thousand pounds per square inch (ksi) 60000 in this case

2: Designates the position it can be welded with. In this case, 2=Flat and horizontal fillets

7: The type of coating on the electrode, in this case iron oxide and it can operate on both AC and DC current.

Question 2

Last digit interpretation of carbon steel electrodes indicates the _____________ and _____________.

Answer 2

Major ingredient in the coating and recommended current type.

Question 3

Which digits represent cellulose coated electrodes? (Last digit, AWS)

Answer 3

0: 6010, 7010, 8010 and the recommended current is DCRP (electrode positive)

1: 6011 and the recommended current is DCRP (electrode positive) OR AC

Question 4

Which digits represent rutile coated electrodes?

Answer 4

2: 6012 using AC or DCSP (electrode negative)

3: 6013 using AC or DC either polarity

4: 7014, 7024 using AC or DC either polarity

Question 5

Which digits represent lime-coated electrodes?

Answer 5

5: 7015 and using DCRP

6: 7016 and using AC or DCRP (electrode positive)

*8: 7018, 7018M, 7028, 7048 using AC or DCRP (electrode positive)

Question 6

Which digits represent iron oxide coated electrodes?

Answer 6

7: 6027, 7027 using AC or DC either polarity.

Question 7

What is unique about the E7018M designation?

Answer 7

The designation is intended to meet most military requirements including greater toughness and lower moisture.

Question 8

Which two electrodes are exceptions to the last digit chart?

Answer 8

6020: Iron oxide coated w/ easy to remove slag. Used on thicker base metals.

6022: Iron oxide coated. Designed for high speed, high current welding.

Question 9

The CSA classification system for electrodes is not only for SMAW but can also be used for _____________________________.

Answer 9

GMAW of non-alloy and fine-grained steels.

Question 10

What is the major difference between CSA and AWS classification systems?

Answer 10

CSA measures tensile strength in megapascals (MPa).

Question 11

Which welding position are the following:
1:
2:
3:
4:

*Both are the same for CSA and AWS classifications.

Answer 11

1: All positions
2: Flat and horizontal fillets
3: Flat only
4: Flat, overhead, horizontal, and vertical down