Tension Test Acceptance Criteria for Welding Procedure Qualification

Tension Test Acceptance Criteria for Welding Procedure Qualification per ASME IX; 

Tension test PQR WPS ASME.png

To qualify the welding procedure according to the ASME Section IX, the mechanical properties of the test coupon must be tested. Tension Test, which is the test of the strength of the weld by The principle of ASME is that Weld Metal must be stronger than or equal to the strength of Base Metal. Therefore, the result of the Tension Test will have Acceptance Criteria as follows.

  1. The workpiece is torn/break at Base Metal:
  • Ultimate Tensile Strength (UTS) or Failure Stress of the workpiece must be greater than 95% of Minimum Specified Tensile Strength (SMTS *) of Base Metal

Note: The Min Specified T.S follows the standard ASTM, Not Actual mentions in MTC.

Tension test PQR WPS ASME 2.png

  1. The workpiece is torn/break at the Weld Metal:
  • Ultimate Tensile Strength or Failure Stress of Weld Metal must be equal to SMTS of Base Metal.
  • In the case of Dissimilar Weld or Base Metal having unequal SMTS, Weld Metal ‘s Ultimate Tensile Strength or Failure Stress must be equal to SMTS of Base Metal with less strength ( lower SMTS ).

* SMTS of Base Material can be found in Table QW-422 in ASME Section IX.

Example of Tension Test Results Evaluation for Welding Procedure Qualification per ASME IX; 

Example of evaluating the Tension Test for the Qualify Welding Procedure according to the ASME Section IX. The Tension Test results are recorded in the PQR.

Tension test PQR WPS ASME 3.png

Tension test PQR WPS ASME 4.png

 

 

 

One thought on “Tension Test Acceptance Criteria for Welding Procedure Qualification

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s