What is Stainless Steel?
Stainless Steel is a steel alloy with a minimum of 10.5% chromium content by mass. Stainless steel is used where both the properties of steel and corrosion resistance are required. So like other cast steel alloys, stainless steel is widely used material for casting production.
Common Material Grades of Stainless Steel Casting
SS304: The most widely used austenite steel, may be referred to as A2 stainless.
SS316: The second most common austenite steel, also referred to as A4 stainless. SS316 is used primarily for its increased resistance to corrosion.
SS304L & SS316L (superaustenitic stainless steel): The “L” means that the carbon content of the alloy is below 0.03%, which reduces the sensitization effect caused by the high temperatures
involved in welding. Compare with 300 series, it shows better resistance to stress-corrosion cracking.
PH17-4: Most common precipitation-hardening martensitic stainless steel, which uses about 17% chromium and 4% nickel.
Process for Stainless Steel Casting
Stainless steel casting made in our steel foundry is mainly by silical sol casting process. Silical sol casting is the most precision investment casting process. This process can produce high precision net shape castings with no machining. Normally we can control such precision stainless steel casting with tolerance CT5-6 level. Another advantage is that, with this process, our foundry can supply stainless steel casting with no defects. Below is a picture showing the main steps for making stainless steel casting:
Surface Treatments of Stainless Steel Castings
Shot blasting: Used to remove surface black oxide skin after casting of stainless steel products.
Pickling & Passivation treatment: Pickling is a chemical treatment way to eliminate surface dirts like oxide skin, rust, welding spots,ect. And passivation is a process that forming a new abundant chromium protective layer, thus to improve the anti-oxidation ability of stainless steel castings.
Electro polishing: Used to remove surface tiny burrs and improve the brightness of stainless steel castings.
Application of Stainless Steel Castings
For the unique physical properties of stainless steel, Stainless steel castings are served for a wide range of applications, especially those in severe environments. Common markets for stainless steel investment castings include oil and gas (valve castings), fluid power (pump castings), food and dairy (meat grinder parts), medical, hardware and locks, agriculture, and many more.
Our stainless steel foundry is one of the leading stainless steel precision casting companies in China. We can manufacture custom stainless steel investment castings that match your exact design specifications. For parts ranging from 50g to 50kg or more, we provide tight tolerances and consistent part to part repeatability. Request a quote today on stainless steel investment castings, or contact us for other questions.