42Crmo4 QT Carbonitriding organization

The carbonitriding organization of 42CrMo4 quenched and tempered steel has a boss who specializes in repairing excavators in Guangzhou.

He often visit and buy 42CrMo4 forged steel as a pin shaft. The pin shaft is mostly used for the connection between two components in construction machinery parts to meet the relative movement between components.

Generally, the pin shaft needs to work under great pressure and friction environment, Therefore, the pin steel must have very high hardness, strength, toughness and other properties.

As a material surface strengthening technology, carbonitriding is a heat treatment process method to infiltrate carbon and nitrogen atoms into the surface of parts at the same time.

Compared with a single carburizing process, it has the characteristics of short production cycle, low temperature and small part deformation, and has been widely used in production.

1) After the adoption of carbonitriding process, the structure of 42CrMo4 quenched steel changes, and a layer of carbon nitride compound layer is generated on the surface. The carbon nitride compound layer has good comprehensive mechanical properties, which can improve the overall plastic toughness of the pin shaft. The 42CrMo quenched steel can be strengthened to resist the harsh environment outside, which is more conducive to production practice.

2) After surface hardening treatment, the surface hardness of the material reaches 650 HV, the tensile strength is about 1120 MPa, and the average impact toughness is 84 J/cm2. The improved process of carbonitriding keeps the core of the material with good toughness, but also greatly improves the surface strength and hardness.

3) The effect of microstructure change on mechanical properties of 42CrMo4 quenched and tempered steel was studied by carburizing process. It has high scientific research value and guiding significance to engineering practice.

Q+T

We offer hardness for 42Crmo4 is 28~32HRC.

If you have demand of 26~30Hrc,it also workable for us.

4140 htsr plate inventory

4140 htsr plate inventory 2000 tons，

you will see our 4140 htsr plate inventory in vedio,

And we offer 4140 htsr plate milling processing by our own,check out all our video,you will see how professional we are.

4140 carbon steel round bar

4140 carbon steel round bar with 20 years experience international trade.

4140 carbon steel round bar,Today,we are loading 2 containers.

4140 carbon steel round bar,we offer hot roll black surface,forged,peel surface.

Let’s check it out.

42 crmo 4 plate milling plate

42 crmo 4 plate milling plate by our workshop.

we could do 42 crmo 4 plate milling by ourselves.

42 crmo 4 plate milling thickness:20~500mm.

42 crmo 4 plate milling in fast delivery,let’s check our workshop milling

4140 alloy precision ground flat

4140 alloy precision ground flat with minum 0.03mm tolerance.

We did the milling by ourselves workshop.

4140 alloy precision ground flat sold to USA every year regularly.

Let’s check the video of our workshop,we are making the 4140 alloy precision ground flat.

4140 normalized round bar

4140 normalized round bar,we got 2 surface condition.

4140 normalized round bar with black surface and peel surface.

Beside,we also offer 4140 round bar in Q+T condition.

Today,we are loading 4140 normalized round bar,let’s check it out.

4340 round bar price

4340 round bar price in China,there are several kinds.

Your must found the 4340 round bar price is so different.

Generlly,it depand on different condition and detail.

1-4340 round bar price-with Q+T Condition.

2-4340 round bar price-with Pelling surface

3-4340 round bar price in big size by Forged

There are about 6-7 kinds in detail,if you want to know more,please contact me.

Now let’s check our 4340 peeling processing.

aisi 4140 round bar

aisi 4140 round bar is making slowing,effected by the China have imposed power restrictions.

Recently, some localities in China have imposed power restrictions, triggering concerns about energy supply for winter.

A spokesman for China’s National Development and Reform Commission (NDRC) said at a press conference on September 29, that China will allow more thermal coal imports and higher domestic production of the raw material( aisi 4140 round bar)to raise electricity generation rates.

Moreover, the supply of coal could be guaranteed by using reserve sources and stocks in the coming winter.

Wuhan Iron and Steel Co., Ltd., subsidiary of major Chinese steelmaker Baowu Group, has announced that it plans to carry out maintenance work.

During the October 21-November 9 periods on its 1,580 mm hot-rolled production lines, which will result in a shortfall of 150,000 mt in its HRC output.

On September 27, inventory of iron ore at 33 major Chinese ports amounted to 120.01 million mt, down 0.78 percent compared to September 13, as announced by China’s Xinhua News Agency.

The rising deliveries in the global market will exert additional pressure. The production restrictions in Hebei and Jiangsu provinces will continue to negatively affect the demand for iron ore, weakening the support for ore prices.

In these few month, the Covid-19 pandemic in the overseas market negatively affected the demand for longs, while most Chinese producers were focused on domestic sales.

In the January-August period of the current year, China’s exports of rebar totaled 6.31 million mt, up 29.6 percent year on year, while wire rod export amounted to 1.42 million mt, up 10.5 percent year on year.

By the way,we can supply the aisi 4140 round bar, steel flat bar, and plate.

Rectangular pieces can be cut from flat bar or plate to your specific sizes.

Today’s news push is finished. If you want to know more, You can asend an email to consult more.

Anti rust ability of 4140 ph plate

4140 ph plate，first of all,we need to understand this material.

Generally, the common antirust elements are Cr and nickel. The Cr content of 4140 ph plate is only 0.9-12.0; The requirement of Ni is less than 0.3. the antirust Cr should be 12.5% at least, and the basic antirust ability can only be obtained when Ni is more than %5.00.

4140 ph plate is a high-strength low-alloy steel with high strength and toughness, good hardenability, tempering brittleness is unobvious, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness. The steel is suitable for manufacturing large and medium-sized plastic molds requiring certain strength and toughness.

This kind of steel has no anti-corrosion performance.so,it might rust. It can’t be said that it is easy to rust. It mainly depends on preservation.

To prevent rust, it is necessary to carry out surface anti-corrosion treatment. If the surface is oiled, it is not easy to rust. The most common surface consition is black surface.

4140 plate specs

4140 plate specs in strick demand,

Milling surface for 4140 plate specs.6 sides milling

We got 4140 plate specs from 4mm~220mm in stock.