This standard applies to gate valves, globe valves, throttle valves, ball valves, butterfly valves, diaphragm valves, plug valves, check valves, safety valves, pressure reducing valves, traps, and plu...
①High wear resistance; ②High compressive strength; ③High surface hardness after hardening; ④Excellent overall hardenability; ⑤It has excellent stability when hardened; in addition to being suitable fo...
Introduction At present, rigid polyvinyl chloride (PVC) pipes and fittings are one of the application fields of polyvinyl chloride products. After years of vigorous development, domestic special pipe ...
The purity of molten steel mainly refers to the gas content and the number, shape and distribution of inclusions in the steel. Only pure molten steel has good castability, can guarantee the quality of...
First, the production process of steel rebar steel surface is ribbed, also called ribbed steel bar, usually with two longitudinal ribs and transverse ribs uniformly distributed along the longitudina...
(%): Carbon chromium molybdenum manganese nickel tungsten vanadium silicon aluminum C Cr Mn Ni WV Al0.95 0.6 1.2 0.6 0.11 4. After hardening and tempering, the high surface hardness and the good match...
1. Overview According to the “Technical Language Standards for Heating, Ventilation and Air Conditioning” (GB50155-92), a heat pump is defined as a refrigerator that can convert the func...
Below the surface of the cast slab, there are large bubbles growing toward the columnar crystals with a diameter and a length of 1 mm and 10 mm or more. These bubbles are called surface bubbles that a...
A universal stainless steel, it is widely used to make equipment and parts that require good comprehensive performance (corrosion resistance and formability). It can withstand general rust in the buil...
This APP is a mobile client developed by the customer. Contains related knowledge such as industry news and industry knowledge, as well as a complete enterprise membership and product platform, as wel...
Process principle: Inside the rotating drum containing the plated parts, glass balls, zinc powder, water and accelerator, the glass balls as the impact medium rotate with the drum, friction and hammer...
The latest development of foreign permanent magnet transmission technology is reviewed. The application field is broadened and the technical performance is improved; some new technologies, new process...
Steelmaking begins with ironmaking. Steel comes from pig iron. Pig iron smelted from iron ore has a high carbon content and contains many impurities (such as silicon, manganese, phosphorus, sulfur, et...
The roll cross wedge rolling mill is the most widely used of the three types of rolling mills: its main advantages are as follows: (1) High productivity, generally 6~25 (pairs)/min. (2) Equipped with ...
It has been pre-hardened to 37～41HRC (surface hardness) without heat treatment. Suitable for molds and parts with complex shapes and precision. Excellent cutting performance, easy to process and engra...
Introduction The electro-hydraulic proportional directional throttle valve is composed of a valve body (mechanical structure) and a proportional control amplifier. There is no proportional control a...
standard encdoing Standard Chinese name Standard English name JB/T10367-2002 Hydraulic pressure reducing valve GB/T12245-1989 Performance test method of pressure reducing valve Methods of performance ...
Rolling unit pressure (specific roll pressure) The rolling force on the unit contact area of the rolled piece and the roll during rolling. Along the entire roll contact area with the rolling piece, th...
(1) Melting point °C The melting temperature when a metal material changes from a solid state to a liquid state (2) Specific heat capacity c J/(kg·K) A certain substance per unit mass absorbs heat whe...
Infrastructure construction is the focus of China’s economic construction. Water supply and drainage projects, especially sewage treatment projects, are large in scale. WTO has entered, and the ...
35Mn2, alloy structural steel. Standard: GB/T 3077-1999 【Main Features】 The plasticity is moderate during cold deformation, and the machinability is fair, but the weldability is poor. Compared with 30...
In the fluid piping system, the valve is the control element, and its main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and drain the pressure....
According to Mining Journal, the world’s iron ore output in 2009 was about 1.59 billion tons, a decrease of 7.6% from 2008. After years of continuous growth, the world’s iron ore output de...
Pre-hardened HB290-330 quenching hardness: HRC52S136H steel characteristics: 1. The best polishing rotation 2. Good permeability 3. Good corrosion resistance 4. After this steel is quenched and mirror...
The large-scale steel finishing rolling stand must ensure the dimensional accuracy of the profile, the surface quality, and realize the negative tolerance rolling. Therefore, the finishing roll must h...
Dahongshan Iron Mine is a large-scale mine under construction in southwestern China. It is an important raw material base for Kunshan Iron and Steel Group, with a designed comprehensive production cap...
310SS31008 310S is austenitic chromium-nickel stainless steel with good oxidation resistance and corrosion resistance. Because of the higher percentage of chromium and nickel, 310S has much better cre...
1. Quenched and tempered steel Heat-treated steel that undergoes quenching and tempering below AC1 is called quenched and tempered steel. Traditional quenched and tempered steel refers to quenched and...
1. The principle of distributed variable frequency pump system In the traditional heating branch pipe network system, a set of circulating pumps are generally installed at the heat source or in the ...
Patent No.: 99249349.8 Patentee: Baoshan Iron and Steel (Group) Company Technical Abstract: This utility model discloses a base brick of a breathable brick, which belongs to a base brick of a combined...
We produce and export high-quality w18cr4v steel, seamless and welded 2 halved butt-welded pipe fittings”. We do complete quality and performance measures for these super austenitic w18cr4v stee...
Types of Standards Industry Standards of the People’s Republic of China Standard Issuing Units Approved by the Ministry of Light Industry of the People’s Republic of China on January 06, 1...
The important structures currently under construction of the Three Gorges Project mainly include power station penstocks, hydraulic turbine seats, and ship gates. The quality of the construction proce...
Shrinkage porosity kills the tiny pores inside the steel ingot. The tiny pores that are concentrated in the axial zone are called loose in the center, and the tiny pores scattered in other parts are g...
C: 0.32~0.45, Si: 0.80~1.20, Mn: 0.20~0.50, Cr: 4.75~5.50, Mo: 1.10~1.75, V: 0.80~1.20, p≤0.030, S≤0.030; H13 steel plate width (210- 610) * thickness (6-80) hot rolled H13 steel pipe outer diameter...
Factory hardness: ≤255HB Hardening temperature: 1220-1240 Hardness: ≤63 cold forging dies, fine punching dies, powder pressing dies, etc., shearing machine dies, glass fiber-added plastic dies, etc. S...