I recently learned that there are more than one carbon equivalent (C.E.) formulas out there. The formulas I am interested in understanding are the AWS and the ASTM versions.
The AWS version includes a term Si/6. The ASTM version includes a term V/5. Can anyone explain the difference? I noticed that ASTM A709 steels contain up to 0.40% Si (some grades even more). The Vanadium content is limited to a much smaller level, typically 0.06% for example. If the silicon content of steel is frequently higher than the limit for Vanadium, then the AWS formula appears more strict.
Is this warranted?
The AWS version includes a term Si/6. The ASTM version includes a term V/5. Can anyone explain the difference? I noticed that ASTM A709 steels contain up to 0.40% Si (some grades even more). The Vanadium content is limited to a much smaller level, typically 0.06% for example. If the silicon content of steel is frequently higher than the limit for Vanadium, then the AWS formula appears more strict.
Is this warranted?