All,
I am wondering about the heating and cooling rate numbers that are given in AWS D1.5-2002 Section 4.4.
More specifically, 4.4.2.2 gives the max heating rate as 5600 / thickness in mm OR as 400*F / thickness in inches. This seems straight forward until the results are converted from Celsius to Fahrenheit, or vice versa. Then you will note that there is approximately 30*F difference in the results.
The cooling rates suffer the same error in the conversions, 7000 / t(mm) and 500 / t (inches).
The latter portion of 4.4.2.3 shows 85*C as equal to 150*F but my calculation shows 185*F. (The 1995 D1.5 shows 80*C as equal to 150* in the same paragraph; a little closer but still off at 176*F).
It seems the only accurate numbers are 315*C/ 600*F.
Has errata been issued on this that I obviously don't have?
Am I that far off in my numbers? (My calculator shows 100*C as being 212*F and 32*F as 0*C but I could be HUA.)
Will 30*F make any practical difference in the maximum heating and cooling rates?
I'm leaning to the conservative side and plan on using the metric numbers but it would be nice to know the story.
Thanks in advance,
Chet Guilford