The company I work for has a large project using 316ti-s/s. I have been trying to make sure we are using the correct filler metal. I have looked at all the lit. I have and googled 316ti and all say to use 316L or 318. We are using 317L  but don;t know why. There is no WPS. would like to make sure before we get to far. We are only about 10% into the job. Could somebody steer me in the right direction on where to find a filler metal chart that shows 317L being used ? Thanks much !