At the end of April, we received an inquiry from a Spanish customer for American standard flanges made of stainless steel 904L. I quoted the price to the customer in time, and received the email from the customer today. The customer has taken the order and is ready to place the order to us. Today let’s take a look at the stainless steel 904L material.

Super Austenitic stainless steel 904L is a high alloy austenitic stainless steel with low carbon content and excellent corrosion resistance in dilute sulfuric acid, designed for harsh corrosion conditions.  Has the high chromium content and plenty of nickel content, the addition of copper makes it have strong ability to resist acid, especially for chloride clearance corrosion and stress corrosion cracking are highly resistant, not easy to appear, erosion and fracture pitting resistance slightly better than other steel grade, good machinability and weldability, can be used for pressure vessels.

Stainless steel 904L flanges

Note for 904L application: 

1.Welding performance  

Like regular stainless steel,90 4 L can be welded in a variety of ways.  The most commonly used welding method is manual arc welding or inert gas welding. The electrode or wire metal is based on the composition of the base metal and has higher purity, and the molybdenum content is higher than the base metal.  Preheating is generally not necessary before welding, but in cold outdoor work, to avoid condensation of water vapor, the joint part or adjacent area can be uniformly heated.  Pay attention to the local temperature should not exceed 100 ℃, so as not to lead to carbon agglomeration, causing intergranular corrosion.  Welding should use small line energy, continuous and fast welding rate.  Generally, heat treatment is not required after welding. If heat treatment is required, it shall be heated to 110 0 ~ 1150℃ and then cooled rapidly.

2. Machining performance  

The machining characteristics of 90 4 L are similar to other austenitic stainless steels, with a tendency of sticking knife and work hardening during machining.  Carbide cutting tools with positive rake Angle shall be used, vulcanized and chlorinated oil shall be used as cutting coolant, equipment and process shall be based on the premise of reducing work hardening.  Slow cutting speed and feed should be avoided in the cutting process.

If you also have an inquiry for 904L stainless steel flanges and pipe fittings, you can also send it to me. I will give you the most competitive price and high quality products.