For preharden alloy steel 4140 plate, some customers would need to know what is the 4140 Prehard Alloy Plate Hardness?

Usually, it’s 28-32HRC hardness for 4140 prehard alloy steel plate. It’s designated as AISI 4140HT or 4140H. For prehard 4140 plate, we keep hundreds of tons in stock for immediate shipment. You have the hot rolled 4140 plate and prehard 4140 plate stock list.