Steel World

2021-10-18 Steel World Comments Off on Rebar production process and application fields

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...

2021-10-18 Steel World Comments Off on What is DF2 steel? What are the applications of DF2 steel?

(%): 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...

2021-10-18 Steel World Comments Off on Application of air source heat pump chiller and hot water unit

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...

2021-10-18 Steel World Comments Off on Subcutaneous bubbles of continuous casting billet

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...

2021-10-18 Steel World Comments Off on What is 304 stainless steel

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...

2021-10-18 Steel World Comments Off on What is the market price of steel? What are the scope of application of steel market prices?

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...

2021-10-18 Steel World Comments Off on Application of New Technology of Foreign Permanent Magnet Transmission in Magnetic Pump

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...

2021-10-18 Steel World Comments Off on Application of New Technology of Foreign Permanent Magnet Transmission in Magnetic Pump

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...

2021-10-18 Steel World Comments Off on How did “iron” transform into “steel”?

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...

2021-10-18 Steel World Comments Off on Features of roll cross wedge rolling mill

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 ...

2021-10-18 Steel World Comments Off on What is DHA1 steel? What are the applications of DHA1 steel?

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...

2021-10-18 Steel World Comments Off on Digital Control Amplifier of Electro-hydraulic Specific Gravity Directional Throttle Valve

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...

2021-10-18 Steel World Comments Off on How to summarize the specifications of the pressure reducing valve

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 ...

2021-10-18 Steel World Comments Off on Rolling unit pressure

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...

2021-10-18 Steel World Comments Off on Characteristics of the use of steel materials

(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...

2021-10-18 Steel World Comments Off on Valve status, application and development

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 ...

2021-10-18 Steel World Comments Off on What is 35Mn2 steel? What are the applications of 35Mn2 steel?

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...

2021-10-18 Steel World Comments Off on What is the meaning of pipeline valves

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....

2021-10-18 Steel World Comments Off on Analysis of World Iron Ore Manufacturing Trends

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...

2021-10-18 Steel World Comments Off on What is S136H steel? What are the applications of S136H steel?

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...

2021-10-18 Steel World Comments Off on Material selection of finishing stand roll

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...

2021-10-18 Steel World Comments Off on Thoughts on Upgrading the Ore Drawing Scheme of the Coarse Crushing Chamber in Dahongshan Iron Mine

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...

2021-10-18 Steel World Comments Off on What is special steel? What are the application areas of special steel?

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...

2021-10-18 Steel World Comments Off on Understanding and classification of alloy structural steel

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...

2021-10-18 Steel World Comments Off on Design and Application of Distributed Variable Frequency Pump System

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 ...

2021-10-18 Steel World Comments Off on Breathable brick base brick

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...

2021-10-18 Steel World Comments Off on What is w18cr4v steel? What are the applications of w18cr4v steel?

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...

2021-10-18 Steel World Comments Off on What is polypropylene (PP) pipe fittings for water supply

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...

2021-10-18 Steel World Comments Off on Selection of welding methods for carbon structural steel and low-alloy high-strength steel

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...

2021-10-18 Steel World Comments Off on Loose steel ingot

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...

2021-10-18 Steel World Comments Off on What is H13 steel? What are the applications of H13 steel?

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...

2021-10-18 Steel World Comments Off on What is M2 steel? What are the applications of M2 steel?

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...

2021-10-18 Steel World Comments Off on What is 420 steel? What are the applications of 420 steel?

After tempering at 200℃ (at least 4 hours), the hardness can reach more than 48HRC, which has better polishability and better corrosion resistance. C Carbon Si Silicon Cr Chromium Mn Manganese Mo Moly...

2021-10-18 Steel World Comments Off on Immersion nozzle and its function

The immersion nozzle is to lengthen the tundish nozzle and insert it to a certain depth below the molten steel surface of the mold, which seals the pouring flow. The advantage of using the immersion n...

2021-10-18 Steel World Comments Off on Manufacturing and application of polybutene pipes

1. Overview of polybutene (PB) pipelines: In recent years, the amount of cold and hot water plastic pipelines used in buildings in China has soared. By 2007, the total amount had reached 400,000 tons....

2021-10-18 Steel World Comments Off on Causes and solutions of oxidation and slag inclusion in aluminum castings

Defect characteristics of oxidized slag inclusion: most of the oxidized slag inclusion is distributed on the upper surface of the casting, at the corners of the mold where no gas flow. The fractures a...