Why the 4140 plate for mask machine ultrasonic is necessary?

Why the 4140 plate for mask machine ultrasonic is necessary?

Since the coronavirus is under control,we start business,like I said before,the 4140 plate is sold a lot and very quickly,as the 4140 plate for mask machine ultrasonic,to produce medical ear-loop face masks with nonwoven materials.

I discussed an 4140 plate order of 175 tons,it just discuss 1 days ago,and my customer sign the contract and make a payment,however,when the payment is reach,I intend to arrange shipment,the warehouse told me that all thickness of thickness 35-40-45mm are sold out,a factory who produce mask machine ultrasonic need it urgently,we know the market demand a lot of mask,but now,the situation is demand exceed supply,every one are waiting more mask in market.it need more factory to manufacture face mask,but the factory need more machine increase the productivity,so now,most of the factory ask for the 4140 plate 35-40-45mm,and some of them had pay already,but these specification is scarcity.

Now,let’s check the most popular steel in 2020 as below.

Applications

DIN 4140 Tool steel is a alloy structural steel, 4140 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,4140 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc

Forming

AISI 4140 alloy steel has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels.

Welding
AISI 4140 alloy steel can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.

AISI 4140 equivalent material

• ♦JAPAN♦ : JIS SCM440 alloy steel
• ♦GERMANY♦ : DIN WN-r 1.7255 / 42CrMo4 steel alloy
• ♦CHINA♦ :  GB 42CrMo steel
• ♦BRITISH♦ : BS 708M40

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

H13 application –Chapter 9

• The design of the die-H13 steel 

The design of mold for H13 steel  depends on the shapes and specification of products to make sure the size of the die. That was good for the strength of dieto H13 steel .

Furthermore, too small radius of rounded corner, ill-suited groove position and etc will make the die gets big pressure during the heat treatment. That is easy to cause crackle. So must make the taper angle, hole and etc at the right position in the mold H13 steel .

• Production technique

1. Forging ProcessThere are so many alloy elements in H13 steel. The resistance of deformation is big at the time of forging. And the thermal conductivity of the material is bad. So the eutectic temperature is low. That is easy to burn. So preheated temperature range must be at 800-900℃. Then heated to the initial forging temperature of 1065-1175℃. In order to crush large non-metallic inclusions and make the carbide get small, the forging ratio needs to be bigger than four. At the cooling process after forging, it is possible to get quenching crack. And the core is easy to get transverse cracks. So H13 steel must be slowly cooled after the forging.  The machining of cutting The roughness of the surface after the machining of cutting, which has a large impact on the thermal fatigue property of steel mold. The roughness of the steel mold surface must be lower. The knife mark and cullet cut are not supposed at here. Those shortages will cause pressure over control to make the thermal fatigue crack. So, must pay attention to handle these things in the mold at the time of processing. 3. The machining of grinding  for H13 steel  will be better .
2. At the process of grinding, the generation of heat by friction at the parts which is easy to cause the problems of crack, empyrosis and etc.

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Which kind of steel would be the best sold in 2020?I guess should be 4140 plate,

4140 plate for mask machine,

Which kind of steel would be the best sold in 2020?I guess should be 4140 plate,Cause the coronavirus is very heavy in China at the beginning of 2020,and it seems it had spread to other countries,such as Japan and South Korea,Italy etc.

Each countries are demand for face mask badly,and now,more and more factory demand for the mask machine,as the Chinese steel market had been shut down, for almost a month,there is no raw material for producing the machine,once the market resume,For making face mask machinea,lot of factory are ordering the 4140 plate steel,when the mask machine is done,there will be enough face mask for defending the desease.

Let’s check the information of 4140 plate for mask machine.

AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.

4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.4140 Annealing delivery hardenss less than 250HB.

Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077

 4140 alloy steel Chemical composition

 Applications

DIN 4140 Tool steel is a alloy structural steel, 4140 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,4140 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Did the steel market effect by the coronavirus?of course it’s,Imagine there 14 billion people are stuck at home

Did the steel market effect by the coronavirus?

Of course it’s.The economic effect alot by coronavirus,especial cause by the industrial.Imagining there 14 billion people are stuck at home to fight for the coronavirus,all the business was stop,actually it’s not only effect the Chinese steel market,the coronavirus also effect the market all over the world.Let’s check some news from The economic news

Near-panic over a spreading coronavirus, sheared more than 1,000 points off the Dow Jones Industrial Average DJIA,-3.15% on Monday, with more and more companies having followed in Apple’s AAPL, -3.39% footsteps ,by warning of lower sales and supply disruptions that could cause even more damage in the next few months.

Just a few weeks ago, from the viral outbreak in China,most economic forecasters were predicting a small impact . Since then the virus has made its way to South Korea, Italy and other countries, raising the prospect that it will spread worldwide.

The U.S. economy has been shielded from direct impacts of the virus, but the side effects are becoming more evident each day. Declining travel. Fewer foreign tourists. Supply bottlenecks for automobile makers and tech companies. The closure in China of popular American retail chain stores such as Starbucks SBUX, -2.76% and McDonald’s MCD, -0.67% . And so on.

Goldman Sachs on Monday raised its estimate,the economic damage to the U.S. for the third time in as many weeks. The bank now predicts the virus will shave eight-tenths,that a percentage point from U.S. growth in the first quarter — double its original estimate. That’s a fairly big chunk of growth.

But I don’t think we need to too anxious,as the Chinese steel factory is going to resume,that meas the mould & engineering business is going to start working,once the industrail is resume,The economy will recover soon.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

In 2020 , we prepare 42CrMo4 Round Bar Hot Rolled Export to abroad almost with 3000Tons . With any shape in sheet plate and round bar and flat bar and square bar and other request by customer . After long time holiday Chinese Spring Festival , this is our first week to come back to work in the office . Thanks for all the regular customer’s concern . We are safe and healthy very well . All the people here are fine , Wuhan is OK now , and China also very well now .

As all the client know that China have outbreak New coronavirus pneumonia , this is truth . But the main epidemic situation is only in Wuhan , which is under control . The government is actively taking many measures to deal with it . Other cities have little impact . And now are have come back to working with facemasks , please believe that it have to be restored already .

From here , we will work like before .  We have more 16 years experience in 42CrMo4 Round Bar Hot Rolled , steel plate, flat bar, square supply. 42CrMo4 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of 42CrMo4  alloy steel.

42CrMo4  alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC. 42CrMo4  Annealing delivery hardenss less than 250HB.

42CrMo4 Round Bar Hot Rolled Export and flat sections can be cut to your required sizes. 42CrMo4 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. SAE 4140 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

With all the conditions , we believe that 42CrMo4 Round Bar Hot Rolled Export to other country in 3000Tons was a piece of cake .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

I heard the 42crmo4(thicknesss40-50mm) were sold out by the mask factory,it’s really shock me.

I heard the 42crmo4(thicknesss40-50mm) were sold out by the mask factory,it’s really shock me!

As the chinese epidemic situation,our company had shut down for a month,that could make sure all workers are safe and clean. Today is our first working day after the coronavirus epidemic,I ask the 42crmo4 stock list from warehouse,and they told me that thicknesss40-50mm is out,as 42crmo4 was sold out by the mask factory,I was so curious why mask factory,I don’t think it need steel to make mask.and then they told me is not for making mask,it’s for machine which produce mask.and it’s push by government everyday. And our cutting factory is very busy with it.as our factory is the biggest 42crmo4 stoickist in south of China. I think it’s so meaningful,it not only prove our qulity is good for government project,but also we can do some good thing for our country. Now,we prefer to send all 42crmo4 to mask factory,we hope the it’s very helpful for our country.

If you want to know more about 42CrMo4，please check as below or contact me directly.

Equivalent Of 42CrMo4 alloy Structure Steel

Heat Treatment

42CrMo4 alloy steel is heated at 845°C (1550°F) followed by quenching in oil. Before hardening, it can be normalized by heating at 913°C (1675°F) for a long period of time followed by air cooling.

Forging

Forging of this steel should be carried out between 2200 and 1650 º F (1200 and 900 º C). The lower the finishing temperature from forging, the finer will be the grain size. This alloy should ideally not be forged below 1650 º F (900 º C) and should be slow cooled after forging.

Hot Working

42CrMo4 alloy steel can be hot worked at 816 to 1038°C (1500 to 1900°F)

Annealing

42CrMo4 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.

Tempering

42CrMo4 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has a lower tempering temperature. For example, the tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).

Hardening

42CrMo4 alloy steel can be hardened by cold working, or heating and quenching.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Aisi 4140 plate pre-hardened, otai provides the material for  the mask factory.

Ending  the long spring festival vocation, finally comes the working day. It is a really good news for Chinese people ,because everthing turns to be smooth. Maybe everyone knows the outbreak of New coronavirus pneumonia in china. However ,under the cooperation of Chinese ,the disease is under-control now . all members of our Otai  steel devote to have a deep cooperation with all of  our clients at 2020. Aisi 4140 plate pre-hard ,otai has rich storage. Welcome to call us .

Although the New coronavirus pneumonia makes troubles to our daily life ,it also spreads  to the other country. However , with the unity of every Chinese, I believe the disease will  be disappered like the mist. nowadays ,we keep the office clean, and wear the mask everyday. I believe when the spring comes ,everything will be better.

To  cooperate with the policy of the government, many clients who are making the mask, send us the order of Aisi 4140 plate pre-hard, we are proud of our job because it makes us contribute to the country.

American standard 4140 pre-hardened sheet 12-120mm; can open as your specifications;42CrMo hot-rolled plate 12-185mm can be cut into your specifications, smooth plate finishing.42CrMo / 4140 forging bar 300-500.We guarantee the uniform in hardness. Aotai promises to be responsible for every single shipment to the end, without tangling responsibilities, and solving customer problems as soon as possible.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Chemically, 42CrMo4 shaft Annealed is respectively simple in assimilation with several tool steels. It has 0.42% carbon, 0.30% silicon, 0.20% molybdenum, 1.00% manganese and 1.00% chromium per mass. It also manages to have phosphorus purities in trace amounts and sulfur – up to 0.025 percent.

These trace elements, when presented with the simplest steel such as 1040, generate the characteristics of 42CrMo4 Shaft Annealed. However the 42CrMo4 Shaft Annealed persists congruently simple. It is handled in a more extensive range of more dominated tool steel applications, such as the D or S series of steel.

The 42CrMo4 HT is pre-tempered during processing for an average hardening of 28-32 HRC. The steel has a flexibility module of 200 GPa and a specific gravity of 7.81. It also contains a density of .282 pounds per cubic inch, or 7,810 kilograms per cubic meter.

Since 42CrMo4 HT is pre-tempered, the additional thermal method is often avoided. However, it can be requisitioned at 50-60 degrees Fahrenheit (10 to 15 degrees Celsius) has to return to its most docile stage. It can be resistant, preheating it to 1,250-1,300 degrees Fahrenheit (677 – 704 degrees Celsius). And then heating it to 1,550-1,600 degrees (843 – 871 degrees Celsius), and keeping that temperature for 30 minutes. After heating it, the steel has to be cooled in oil and quickly tempered.

42CrMo4 Shaft Annealed, it is our rolling stock grade. Usually, we will keep the steel plates in stock for about 1000Tons/per day. We sold this steel grade no matter to our domestic customers but also many oversea clients. It is the top 1 on the sales quantity and amount in our company. OTAI is professional in the special steel field for more than 20years, we sold the tool steel, carbon steel, alloy steel and high speed steel for more than 30 countries.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

The last two week , all sales in China are busy about to send the container to abroad . And i also have two container 4140 Round Bar Forged to Ecuador . One container T10 Flat Bar to Bulgaria . The last working day in 2019 Lunar year in China . All the sales and customers are nervous about if there is nothing could not be handle in time in the Chinese Spring Festival holiday .

So we may feel tired and the customer may feel intense . If there is any dispute , please calm down and just take the matter on its merits . Then settle the dispute . We are partner in the business relationship . We could get the win-win business relationships happily . We could do our best to help each other . This is perfect sales and client relationship .

4140 Round Bar Forged always used by some very big size or have strictly request on the internal organizational structure .

We have more 16 years experience in 4140 Round bar , steel plate, flat bar, square supply. AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.

4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC. 4140 Annealing delivery hardenss less than 250HB.

AISI 4140 steel round bar and flat sections can be cut to your required sizes. ASTM 4140 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. SAE 4140 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

if you want to get the 42CD4 Sheet Q+T in China,Frankly,99% of them are 42Crmo Q+T,which means the chemical component is

42CD4 Sheet Q+T which standard hardness is 28-32 HRC generally.

In China, if you want to get the 42CD4 Sheet Q+T ,Frankly,99% of them are 42Crmo Q+T,which means the chemical component is

Actully,Is the similar one as 42CD4 material,as different country have their own producing standard,and most of end user of 42CD4 Sheet Q+T,they told me that it’s used all same,and they don’t think it’s any different.

Applications

42CD4 Sheet Q+T  steel is a alloy structural steel, 42CD4 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,42CD4 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc.

Tempering
42CD4 Sheet Q+T  can be tempered at 205 to 649°C (400 to 1200°F) depending,upon the desired hardness level. The hardness of the steel can be increased, if it has lower tempering temperature. For example, tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and a tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com