Stainless steel flange material model

Stainless steel flange material model
1. Model 301- has good ductility and is used for forming products. It can also be quickly hardened by mechanical processing. It has good weldability and is better than 304 stainless steel in abrasion resistance and fatigue strength.

　　2, model 302-corrosion resistance is the same as 304, because the carbon content is relatively high, the strength is better.

　　3, Model 303-By adding a small amount of sulfur and phosphorus, it is easier to cut than 304.

　　4, model 304-general model; that is, 18/8 stainless steel. The GB grade is 0Cr18Ni9.

　　5, Model 309- has better temperature resistance than 304.

　　6, model 316-after 304, the second most widely used steel grade, mainly used in food industry and surgical equipment, adding molybdenum element to obtain a special corrosion-resistant structure. Because it has better resistance to chloride corrosion than 304, it is also used as "ship steel". SS316 is usually used in nuclear fuel recovery devices. 18/10 grade stainless steel usually also meets this application level.

　　7, model 321-except for the addition of titanium to reduce the risk of corrosion of the material weld, other properties are similar to 304. 400 series-ferritic and martensitic stainless steel.

　　8, model 408-good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni. Model 409-the cheapest model (British and American), usually used as car exhaust pipe, is a ferritic stainless steel (chrome steel). Model 410-Martensite (high-strength chromium steel), good wear resistance, poor corrosion resistance.

Stainless steel flange material classification
1. Classified by chemical composition: 1. CR series: ferrite series, martensite series 2. CR-NI series: austenite series, abnormal series, precipitation hardening series.

　　 2. Classification by metallographic structure: 1. Austenitic stainless steel 2. Ferritic stainless steel 3. Martensitic stainless steel 4. Duplex stainless steel 5. Precipitation hardening stainless steel

The gasket is placed between the sealing surfaces of the two flanges.

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