Steel (Group/Category/Classification/Grade/Specification/Class). What are they?

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I'm researching about welding and reading AWS D1.1, I've encountered these terms. I don't know what they mean, but they are not used interchangably from my interpretation. I have no background in welding whatsoever, except I've read a few books only. I only know general information about steel phases and microstructure, but industry specifics i have no clue. Can someone tell me what each of these mean, 1. Group2. Category3. Classification4. Grade5. Specification6. ClassIf these terms also refer to both filler metals as well as steels, or any other stuff related to welding. Please tell me, i've been googling for days
Reply:Can you give an example of a procedure that lists these things? It would make it easier to know which each term refers to.
Reply:khlumps'Give us a whiff' of the: perspective, context, or application of your inquiry; and the answers will flow . . .Is this a high school assignment - or a mechanical/material engineering question? Be forthcoming - because good answers can be semi/large [and require foundation]while - bad answers can be mega/large - and tell you nothing.Opus
Reply:You can try and get it from the horses mouth. https://app.aws.org/forum/forum_show.plCity of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:Originally Posted by OPUS FERROkhlumps'Give us a whiff' of the: perspective, context, or application of your inquiry; and the answers will flow . . .Is this a high school assignment - or a mechanical/material engineering question? Be forthcoming - because good answers can be semi/large [and require foundation]while - bad answers can be mega/large - and tell you nothing.Opus
Reply:Since you listed TLDR (too long didn't read) I'll assume you don't want to understand, just have someone tell you,Try this calculator: http://www.axoncalc.com/weld_preheat_calc.phpWhich was the first thing that showed up on a google search for preheat and interpass temps.And directly from D1.1, which I thought you said you read.Last edited by MinnesotaDave; 06-15-2015 at 09:34 PM.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:I wonder if your boss is trying to confuse you by asking for such a broad request? There are hundreds of different types of steel and they can't all be put into simple categories. See if you can get a sample procedure that lists all the terms you mentioned. Group for example could be a type of steel or a type of filler metal. A sample would give you a template to better understand in what context each term is being used for.
Reply:Originally Posted by Welder DaveI wonder if your boss is trying to confuse you by asking for such a broad request? There are hundreds of different types of steel and they can't all be put into simple categories. See if you can get a sample procedure that lists all the terms you mentioned. Group for example could be a type of steel or a type of filler metal. A sample would give you a template to better understand in what context each term is being used for.
Reply:@MinnesotaDave, I've seen this already in D1.1. I'm looking for more
Reply:Originally Posted by khlumps@MinnesotaDave, I've seen this already in D1.1. I'm looking for more
Reply:If you can't talk to your boss and get some more info, we're just going to go around in circles till the cows come home. Sometimes not asking questions makes you look stupider than if you do. If it's that hard to talk to your boss, perhaps you should be looking for another job? We can't guess what you want and neither can you.
Reply:if you look for more than you have to buy the standards where this is explained in.
Reply:On table 3.2, Row "A", the temperature for A36 at 2.5 inches thick would be 300 degrees F.  Correct?Had a lengthy discussion with a CWI this morning and he says the row where A36 is says 32 degrees minimum, so that is all that is required to weld 2.5" thick lifting lugs on 1" thick plate.