We have a XRF alloy analyzer, but it is insenstive to carbon. Is there a simple test to measure carbon content that we can run to determine if a material is 316 vs 316L, or 304 vs 304L? We need to identify metals at incoming inspection and on our shop floor.
Thanks for your ideas!
We have been using Inconel 600 and 625 in our NACE MR0175 compliant products for many years. In the 1997 version of the spec the relevant sections were 4.1.4.1 and 4.1.5.1. However, upon reviewing the recent 2003 version, section 4.11.1 precludes the use of Inconel 600 because the Mo content...
We use gold plating to stop hydrogen permeation in a thin SS sensing diaphragm, but the process of applying the gold plating is causing hydrogen to go through the diaphragm and to be stored in it. How might we change the plating process or post-treat the sensor to avoid the hydrogen problem...
After cad plating stainless steels we normally specify a baking procedure to avoid hydrogen embrittlement issues. Do high strength steel materials like 4037/4140/4142/8637/8740 that are cad plated have problems with hydrogen and also need baking?
Thank you for your assistance,
Jim
We are in the process of sourcing machined parts in China and need to know whether the Chinese material specification GB/T3077 for their 42CrMo is equivalent to our ASTM/AISI 4140 and 4142 (we use both interchangeably). The obvious metallurgical difference is that 4140/4140 have trace...
Most of the material standards state that the amount of manganese in 303SS should be less than 2%. We have a supplier who wants to supply '303' with >2% manganese. What is the effect if the manganese runs 0.5-1.0% high?
Thanks,
Jim
I am working on a project where I need to select the bolt material that will withstand long-term exposure to marine environments. What mat'l would you recommend that has a relatively high strength? The fastener will retain a 316SS vessel (at ambient temperature) . I would desire >100K PSI...
