CNC Knowledge: Basic stainless steel models, collected!

Sulfur in stainless steel, phosphorus

The sulfur content of steel must not exceed 0.05%;

Therefore, the phosphorus content is a very important indicator.

The sulfur and phosphorus content does not exceed 0.04% steel, which is called high quality steel;

The common stainless steel phosphorus content is:

Common stainless steel model

Constable stainless steel models commonly used digital symbols, there are 200 series, 300 series and 400..

200 series: Chromium-Nickel-Manganese austenite in stainless steel

300 series: stainless steel with austenite chromium-nickel

301: Good ductility, to mold products. It can also be hardening by machine speed. Good welding. Orthodigo and fatigue resistance are better than 304 in stainless steel.

302: Corrosion resistance is the same as 304. Because the carbon content is relatively high, the resistance is better.

302B: It is a stainless steel containing silicon, which has high anti-temporary oxidation performance.

303: By adding a small amount of sulfur and phosphorus, it is compared to the cut.

303SE: It is also used to make parts that require heat, because under these conditions, this stainless steel has a good heat treatment.

304: It is in 18/8 stainless steel. The GB brand is 0CR18ni9.

304L: This is a variant of 304 in stainless steel with low carbon content, which is used for welding opportunities. The lower carbon content makes the carbides precipitated in the thermal effect zone near the minimum of the welding seam, and the precipitation of the carbides can cause stainless inter-corrosion (welding erosion) in certain environments.

304N: This is a kind of stainless steel containing nitrogen, which must increase the resistance of the steel.

305 and 384: it contains high nickels and its rates of hardening of treatment is low.

308: It is used to make scratches.

309, 310, 314 and 330: the nickel and chrome content is relatively high, to improve antioxidant performance and peristaltic resistance of steel at high temperature. The 30S5 and 310 are 309 and 310 variants in stainless steel. 330 Stainless steel has a particularly high carburetor capacity and thermal shock resistance.

316 and 317: contains aluminum, so that the anti-point corrosion capacity in the marine and chemical industrial environment is very better than 304 in stainless steel. Among them, the 316 in stainless steel is 316F, which includes stainless steel with low carbon 316L, stainless steel with high length 316N and high-soufre volume with high intensity stainless steel.

321, 347 and 348: it is made of stainless steel with titanium, 铌 钽 钽 钽 and stable stabilization, which is suitable for welding components used at high temperatures. 348 is a stainless steel adapted to the nuclear industry and has certain restrictions on the consolidated quantity of tadpoles and exercises.

400 Series: Iron Body and Martensite Inoxdless Steel

408: Good heat resistance, low corrosivity resistance, 11% CR, 8% neither

409: The cheapest model (Great Britain and United States) is generally used as a car exhaust pipe, which is made of stainless steel in ferrite (chrome steel)

410: Matrier (high length chrome steel), good abrasion resistance, poor corrosion resistance. 416: The sulfur has improved the performance of material treatment.

420: “Blade” Ma’s Steel, the first stainless steel like high steel from BU. It is also used for surgery knives, which can be made very strongly

430: Ironine in stainless steel, decorative, such as car accessories. Good molding, but temperature resistance and corrosion resistance are poor

440: Steel with high intensity blade, which is slightly high in carbon. The most common examples of application are the “shaving blades”. There are three common models: 440A, 440B, 440C and 440F (easy treatment type)

500 series: heat -resistant chrome alloy steel

600 series: hard -driving stainless steel precipitate matrix

630: The most used stainless stainless steel model is generally 17-4;