Aug 8, 2007 · I have a part from a non-domestic source that is being fabricated from 42CrMo in lieu of 4140. We recently discovered that the parts were being case hardened instead of thru-hardened. The core ran around 42 Rc, within specification, but there was a .009" thick case that was around 60 Rc when no case should exist.

Feb 22, 2002 · 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 percentages of P and S.

Jan 12, 2021 · 42CrMo grade is from China GB/T 3077 standard steel material. It is a medium carbon alloy structural steel with good mechanical properties, good hardenability and wide application. In the machinery industry, 42CrMo alloy is often used to manufacture gears, connecting rods, high strength bolts and other important parts.

Jan 26, 2005 · Rolling contact fatigue is highly dependent upon surface roughness, inclusion type and amount, case hardness, case microstructure (non-martensitic transformation products, intergranular oxidation, etc., retained austenite, carbide distribution, etc.), and residual stresses.

Nov 7, 2006 · I have 2 drive pinions which I need to harden. The material is 42CrMo4. One of them has 29 teeth at 4.5 module and a face width of 40mm meshing with an 88 tooth

Aug 13, 2024 · Are you requesting for information about 42CrMoV or 42CrMo4V? As long as I know, AISI 4140 is 42CrMo and there is no vanadium addition. I do have some technical literature on welding 42CrMo, but they all focus on welding specifications for dissimilar materials. Take AISI 4140 + S235JR dissimilar welding for example. The literature states:

Feb 15, 2008 · Hi to all! I have a part from a turbine that I have to weld. I called the factory and they told me that it was made from K18. Its a kind of stainless steel, I need to know the chemical composition and the pre/post weld process to weld it. Hope somebody knows the equivalent in ASTM, AWS, etc...