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Using EN 15614-1 as the governing spec...We weld carbon steel plate which we buy in the "as rolled" condition but we have specified a chemistry which we know will reach X80 (550Mpa) after Q&T. If the as rolled plated has a YS of 360 MPa but the weld tests for the WPQR after Q&T reach say 550Mpa, is it correct the the WPQR then on qualifies material up to 360Mpa and not 550Mpa?
Reply:The "bog standard" structural steel over here in the UK used with a range of 275-355 MPa generally falls under parent material group 1.2 (low carbon steels with a specified minimum yield strength 275-360 MPa). If your steel properties are significantly different after Q&T, then to me that suggests a high quality medium carbon, or alloy steel, since low carbon steel (ie group 1) will never reach these yield strength values after Q&T.In fact, reading the criteria it's either a group 2.2 material or a group 3.1. You'd have to provide more info to select which it is.The groups are specified in TR 15608.You're not mixing up YS and UTS values, by any chance?Last edited by Munkul; 6 Days Ago at 05:12 AM.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:
Originally Posted by Munkul
The "bog standard" structural steel over here in the UK used with a range of 275-355 MPa generally falls under parent material group 1.2 (low carbon steels with a specified minimum yield strength 275-360 MPa). If your steel properties are significantly different after Q&T, then to me that suggests a high quality medium carbon, or alloy steel, since low carbon steel (ie group 1) will never reach these yield strength values after Q&T.In fact, reading the criteria it's either a group 2.2 material or a group 3.1. You'd have to provide more info to select which it is.The groups are specified in TR 15608.You're not mixing up YS and UTS values, by any chance?
Reply:
Originally Posted by davmacf
So my parent material is probably group 1.2 but the end product is 3.1. Since the requirement of the end product is a YS higher than group 1.2, our end user is suggesting the WPQR does not cover material up to the YS value reached on the test piece. This seems odd to me.
Reply:Have you got a copy of TR 15608 in front of you?You may need an interpretation from a notified body.There's a note at the bottom of the Steels section saying "based on the product analysis, group 2 steels may be considered group 1" My interpretation of this is that the YS and composition is more important than the heat treatment state, and therefore, if your steel meets the composition requirements, it could then come in under group 1.3 as "normalised" but allowing YS above 360MPa.But... what do I know. I'd talk to someone with more experience than me, if I were you.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:WAY too many guesses, "probably's" and other variables that are not defined,,The PERSON making the demands of the finished product needs to EXACTLY specify the materials (plate and filler metal used to weld) that are used.A Manufacturing Engineer, or Welding Engineer needs to write the process,,WHO is turning you loose to GUESSING material, and process?? WOW!!,,Guessing is OK if there are no end product requirements,, ( a skid plate for my pickup, for example,,)
Reply:
Originally Posted by SweetMK
WAY too many guesses, "probably's" and other variables that are not defined,,The PERSON making the demands of the finished product needs to EXACTLY specify the materials (plate and filler metal used to weld) that are used.A Manufacturing Engineer, or Welding Engineer needs to write the process,,WHO is turning you loose to GUESSING material, and process?? WOW!!,,Guessing is OK if there are no end product requirements,, ( a skid plate for my pickup, for example,,)
Reply:
Originally Posted by davmacf
Using EN 15614-1 as the governing spec...We weld carbon steel plate which we buy in the "as rolled" condition but we have specified a chemistry which we know will reach X80 (550Mpa) after Q&T. If the as rolled plated has a YS of 360 MPa but the weld tests for the WPQR after Q&T reach say 550Mpa, is it correct the the WPQR then on qualifies material up to 360Mpa and not 550Mpa?
Reply:550 Mpa in real world is 79,770 psi360 Mpa is 52,213 psi.Dave
Originally Posted by Willie B
All these years I been tellin you!
Reply:Will 7014 work here?www.urkafarms.com
Reply:You said 7014 we will get 10,000 post before saying UNCLE Dave
Originally Posted by Sberry
Will 7014 work here?
Reply:Pretty sure he was kidding with the 7014 comment. Just so you don't require 10,001 posts explaining why 7014 wouldn't be suitable you need to know that 7014 isn't for quenched and tempered steel. Hopefully the discussion of 7014 ends here.
Reply:Maybe it was 6013 I was thinking of?www.urkafarms.com
Reply:Yes 6013 will work too.Old 9,000 posts and then UNCLE. Dave
Originally Posted by Sberry
Maybe it was 6013 I was thinking of? |
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发表于 2022-6-8 15:51:32