Page 78 - SSAB Welding Handbook Edition 2

©2009-2019 by SSAB Group of companies (SSAB). All rights reserved. Only digital PDF file. No distribution. No printing allowed!
No part of this handbook may be reproduced in any form or by any means without permission in writing from SSAB.
13.0 Distortions in joints Welding handbook

Welding towards sections of lower Presetting of the joint
constriction Presetting the plates in the structure prior to welding
©SSAB
Welding evaluations that are executed from areas can compensate for the distortions to come.
with high levels of restraint towards areas with
lower levels of restraint show decreased levels of One way to prevent distortions is to make welding
distortions. Two suitable options in this respect are trials with no presetting to see where the distortions
illustrated in fig. 13.7. occur. After each trial, the distortions are measured
and the average values of the distortions are
calculated. Finally, prior to production welding, the
joint is preset at the average values of distortions,
1 2 but in the opposite direction, see fig. 13.8.

4 3
Before welding After welding
5 6

8 7

Tack weld plates in this position
for fillet welding here

1 2

Fig. 13.8: Presetting of a fillet joint and a single-V butt joint.

Fig. 13.7: Different examples where welding sequences are performed
towards sections with lower levels of restraints.

78 This handbook contains general suggestions and information without any expressed or implied warranty of any kind. SSAB hereby expressly disclaims
all liability of any kind, including any damages, in connection with the use of the information and for their suitability for individual applications.
It is the responsibility of the user of this brochure to adapt the recommendations contained therein to the requirements of individual applications.