Thank you chaps for those comments.
On the boron issue, I notice that the max B in the HSLA Chinese Q690D plate that we're currently welding is spec'ed at 0.004% which is mid-range of the A487 7A spec (0.002–0.006). We will discuss this with the foundry and the welders, but perhaps it's a...
We’re looking to change to investment castings to replace components currently produced from plate that need fairly high strength and are subject to bending forces, we currently use Chinese HSLA plate with minimums of 690 MPa yield & 800 MPa UTS with about 15% elongation.
We produce varying...
