Baoding Guokun Machinery Co., Ltd www.guokuncasting.com could supply you the high quality investment casting, sand casting, steel casting, iron casting, cnc machining, etc A . 尺寸，形状缺陷 铸造缺陷casting defects 尺寸超差impropershrinkage allowance

Carbon steel Carbon steel is steel in which the main interstitial alloying constituent is carbon in the range of 0.12–2.0%. Carbon steel is broken down into four classes based on carbon content: Low-carbon steel 0.05-0.25% carbon content. Medium-carbon steel Approximately 0.3–0.6% carbon content. Balances ductility and strength and has good wear resistance; used for large parts, forging and automotive components. High-carbon steel (ASTM A304) Approximately 0.7–2.5% carbon content. Very strong, used for springs, swords and high-strength wires. Ultra-high-carbon steel Approximately 2.5–3.0% carbon content. Steels that can be tempered to great hardness. Used for special purposes like (non-industrial-purpose) knives, axles or punches. Most steels with more than 2.5% carbon content are made using powder metallurgy. The carbon steel investment casting, carbon steel lost wax casting, carbon steel water glass casting, carbon steel sand casting, carbon steel die forging are produced by Baoding Guokun Machinery Co., Ltd(www.guokuncasting.com) are as follows: 1. 45#/ C45E/ 1.1191/ S45C/ ASTM 1045/ UNS G10450 2. 25Mn / ASTM 1026 3. 30Mn / 1.1146/ ASTM 1033 4. 30#/ C30E/1.1178/ ASTM 1030 5.Q235/ S235JR/ SS1311/ St37-2 Carbon steel casting forging parts served industry: Food processing parts, Sporting Equipment, Mining casting parts, Pipe fittings & pump parts, Automobile, truck, bus parts, Oil & gas casting, manhole covers and frames, casting latch If need more information, please contact us via gina@guokuncasting.com

Blind flange Blind Flanges are manufactured without a bore and used to blank off the ends of piping, Valves and pressure vessel openings. From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed flange types. However, most of these stresses are bending types near the center, and since there is no standard inside diameter, these flanges are suitable for higher pressure temperature applications. Other Flange we produced: Type: Indurtrial pipe flange, blind flange, wled-neck flange, slip-on flange, socket weld flange, lap-joint flange, threaded flange, etc Process: Investment casting, sand casting, silica sol casting, lost wax casting, close die forging, mould forging, precision machining, welding, etc Material: carbon steel, alloy steel, stainless steel, brass, plastic, etc If need high quality and cost effective Industrial Pipe Flange, please contact us via gina@guokuncasting.com or gina.guokun@gmail.com

How die forgings compare to machined bar/plate? Forgings offer broader size range of desired material grades. Sizes and shapes of products made from steel bar and plate are limited to the dimensions in which these materials are supplied. Often, die forging may be the only metalworking process available with certain grades in desired sizes. Forgings can be economically produced in a wide range of sizes from parts whose largest dimension is less than one inch to parts weighing more than 450,000 pounds. Forgings have grain oriented to shape for greater strength. Machined bar and plate may be more susceptible to fatigue and stress corrosion because machining cuts through the material grain pattern. In most cases, die forging yields a grain structure oriented to the part shape, resulting in optimum strength, ductility and resistance to impact and fatigue. Forgings make better, more economical use of materials. Flame cutting plate is a wasteful process, one of several fabricating steps that consume more material than needed to make such parts as rings or hubs. Even more is lost in subsequent machining. Forgings yield lower scrap and greater, more cost-effective production. Forgings, especially near-net shapes, make better use of material and generate little scrap. In high-volume production runs, die forgings have the decisive cost advantage. Forgings require fewer secondary operations. As supplied, some grades of bar and plate require additional operations such as turning, grinding and polishing to remove surface irregularities and achieve desired finish, dimensional accuracy, machinability and strength. Often, forgings can be put into service without expensive secondary operations. If need forging parts, casted parts, machined parts, please contact Guokun Machinery (www.guokuncasting.com) or email us gina@guokuncasting.com

Regulations for Speed Bumps Speed Bumps can be an effective means of reducing speed and promoting safe driving. There are certain regulations that govern the use of speed bumps. Though the details differ from place to place, there are some generalities among them. Authority In most areas, a speed bump located in a public parking lot or on a public road requires a permit. On private property, such permits are not required. Speed Limit Speed bumps are usually restricted to areas where vehicles travel at speeds of less than 25 mph. Placement and Grade The steepest grade usually permitted for a speed bump is 8 percent. Typically, it is required that continuous speed bumps be more than 300 feet apart. Signage Signs should be placed warning motorists of the bump they are approaching. Different localities require different minimum distances from the bumps. Warnings If a speed bump on private property results in damage to a vehicle or injury, the owner of the property could be held responsible. This could have legal or financial consequences. Baoding Guokun Machinery Could supply you high quality Cast steel Speed Bumps and steel casting, iro casting, die forging, cnc machining, etc