Forging round 40XH

Steel 40khn - characteristics, heat treatment, application Steel 40khn (State standard specification 4543-71) belongs to a qualitative structural steel (to a t.a intended for production of machine-building and construction products) to the alloyed nickel steel chrome alloys. Addition of nickel in composition of steel increases its chemical stability. For the first time this phenomenon has been open at the end of the nineteenth century. The French chemist Proust has suggested that iron meteorites are poorly subject to corrosion exactly thanks to nickel in their structure. In 20 years Faraday has melted the first iron alloy and nickel which possessed the increased anticorrosive stability. But only after receiving forgeable nickel there was an opportunity to create nickel steel alloys which possessed twice a big elastic limit, high anticorrosive properties and big mechanical strength. Steel 40 hn gains additional resistance to the rusting factors thanks to a chrome additive. It also increases such mechanical properties of steel 40khn as hardness and durability. A prime area of use of steel 40khn – production of parts which are operated in the conditions of the raised dynamic load, vibration. These are such parts as axes, rods, shaft, locks (nipples and couplings) for oil pipelines. Make of steel 40khn also cogwheels, spindles, bolts, rods of hydraulic cylinders, rolls of vacuum mills. Generally, this alloy is used for parts which material should possess the increased viscosity, and durability. The maximum thickness of parts from steel 40khn should not exceed 120 mm. The analogs of steel 40khn allowed for use in the same purposes: 40X, 40XHM, 40XHP, 30HGVT, 35HGF, 38HGN, 45XH, 50XH. Steel 40khn incorporates: from 0,36 to 0,44% of carbon; 0,17-0,37% of silicon; 0,5 - 0,8% of manganese; from 1 to 1,4% of nickel; at most 0,035% are gray and as much phosphorus; 0,45 – 0,75% of chrome and to 0,3% of copper. The sulfur content and phosphorus (it is less than 0, 36%) allows to rank steel 40khn as qualitative alloy steels. Marking became in accordance with GOST 4543-71 designates carbon content, chrome and nickel, rounded to whole (one percent is not reflected in marking). Welding process for alloy steels are a little complicated as the okoloshovny zone is inclined to tempering and in it brittle structures can be formed (welding demands special technology). Welding works can be performed at heating before process and issue or annealing upon termination of welding at once. Heat treatment of steel 40khn includes tempering and issue. After such heat treatment steel 40khn gets a fatigue limit on crack formation twice bigger, than before processing, and strength on destruction – by 6 times. Tempering of metal 40XH is usually made in oil; large-size parts in rare instances subject to a hardening in water with the subsequent immediate low issue or with transfer in oil. Often parts from steel 40 hn temper when heating by high-frequency currents and the subsequent issue. As a result of this procedure receive high surface hardness (RC = 52 — 56). Buy the Forging round 40XH legko:1. You send zayavku2. We expose to you schet3. You pay convenient for you sposobom4. You receive the goods the Most important that you need to know about the BVB-alliance company. • Deliverable metal rolling constantly is available, and is stored "about 2000 tons" in a warehouse. • Own production of a professional flooring. • We offer a payment delay "about one month". • We do everything possible for minimization of terms of processing and delivery. • We carry out metal cutting in the size and according to your drawings. • We provide service of safe custody in the covered warehouse. • We offer the loyalty program allowing to receive discounts for purchase, processing or delivery of metal rolling. Advantages of work with nami:1. Goods available on sklade2. Official garantiya3. High quality tovarov4. Operational dostavka5. The program round 40XH you can specify the loyalnostiaktualny price on the Forging at our manager. The final price of products forms, proceeding from terms of delivery: quantity, terms of payment and place of shipment. Ask the manager. This price list has exclusively information character and under no circumstances is not the public offer determined by provisions of the p. 2 of Art. 437 of the Civil code of the Russian Federation.

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