A105 and A350 Raw Material
A105 and A350 Raw Material
(OP)
Could someone please enlighten me how a mill could certify that a material in bar form complies with a forging specification? I've been trying to get a straight answer from our material suppliers, and am not satisfied with what I've been fed. Does ASTM A 961 have the answer?
If a manufacturer machines a part out of a piece of bar that was certified in compliance with A 105 or A 350 LF2, can they claim that the part is machined from a forging?
If a manufacturer machines a part out of a piece of bar that was certified in compliance with A 105 or A 350 LF2, can they claim that the part is machined from a forging?
RE: A105 and A350 Raw Material
A part machined from a bar cannot be certified as being machined from a forging. A macrograph of a longitudinal section shows the difference. Forging process should be approved and possibly frozen.
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RE: A105 and A350 Raw Material
I find it interesting that B16.34 allows use of A 105 or A 350 without a reference to the qualifications in those specifications. How else would a manufacturer know that you could not machine a flange from that material? I feel more comfortable specifying complex, pressure-containing parts be made only from A 696 Gr C, than to risk high strains in a weak direction of the raw material.