Can I perform alternative RT test instead of mechanical test on the test coupon?
Yes you can do it, but limit subsection 184.108.40.206
@Amsiz Yes, you can. Refer to Clause 220.127.116.11-Substitution of RT for Guided Bend Tests and Clause 4.22.3-RT in AWS D1.1-2015 for more details.
Acc. to AWS D1.1, alternative RT instead of guide bend test except welding process GMAW-S
GMAW-S, affix “S” means?
GMAW-S is a welding process of GMAW with short circuiting transfer mode.
GMAW-Sp: stray transfer mode
GMAW-P: pulsed transfer mode
GMAW-S: globlar transfer mode.