H13 application –chapter 10

heat treatment of H13 steels are decarburization, superheating, And also make the mold surface gets residual tensile stress. H13 steel will make the mold get failure early. If the temperature of H13 steel some parts of grinding surface up to over 800℃, and not make it cool fully. Then the material of the surface layer will be re-austenize.

1. And quenching into martensite. So the surface layer of the die for H13 steel  will get high stress. At the same time, that H13 STEEL  will make the possibility of getting grinding crack be higher. The technology of heat treatment Taking the heat treatment in the right way will make the mold get what it needs about the properties and raise the time of working. But if do h13 steel  in the wrong way, it will cause the defects of heat treatment. H13 steel will harm hugely to its load capacity. The defects of hdehiscence, strength is not enough and etc. After a period of time of use, the internal stress accumulates to a damage level. It must do a work of strain relief tempering. If not, it will dehiscence during work time.

The use and care of H13 steel die

1. The preheat of steel mold H13 steel has high content alloy elements and its thermal conductivity is bad. So it must fully preheat before the use. The temperature of preheating too high, then the temperature of the mold will be higher during the work. And its strength will get down, it will easy to get plastic deformation then make the surface subsides. However, if the temperature of the preheating is too low, the temperature of the surface has a big change. With high heat stress, get the crackle is more easily. The temperature of preheating for H13 steel mold is at the range of 250-300℃.
3. H13 steel that can reduce the temperature difference between the mold and the forgeable piece to avoid excessive thermal stress on the surface of the mold, and effectively avoid the plastic deformation of the mold surface.

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a

42CrMo4 material for FaceMask Machine . In the the beginning of  this year 2020 , China have affected by a novel coronavirus , and for now we still stay in the office and wearing with facemask . Hundreds of millions of masks are consumed every day . The most busy factory was Mask manufacturers . And our factory provide 42CrMo4 Hot Rolled Steel for FaceMask Machine . We are the First batch of manufacturers allowed to resume work in China .

And What makes us sad is that the novel coronavirus  have been outbreaks in South Korea and Japan recently . This means more demand for masks . More demand of mask machine , and most demand of 42CrMo4 Hot Rolled Steel raw materials .

OTAI Special Steel provide 42CrMo4 material for FaceMask Machine . And we have more than 16 years provide special steel raw materials export experience to abroad .  42CrMo4 material is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components . Like axles, shafts, bolts, gears and other applications .

Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content . The higher carbon content of 42CrMo4 material gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels . However it does have inferior weldability characteristics.

42CrMo4 material steel bar, flat or plate material can be used for as wide variety of applications where greater toughness and wear resistance is needed over lower carbon grades . Typical applications for 42CrMo4 tool Steel uses include Components, Adapters, Arbors,strippers, holder blocks, mold bases, ejectors . Back up and support tooling, fixtures, jigs, molds, cams, drill collars, Axle Shafts, Bolts, Crankshafts,stubs . Couplings, reamer bodies, axles, shafting, piston rods, rams, hydraulic machinery shafts, gears.

Sprockets, gear racks, chain links, spindles, tool bodies, tool holders, tie rods, Connection Rods, Chuck Bodies . Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts,Lathe Spindles, Logging Parts . Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions, Pump Shafts,boring bars,tracks, slides . Wear strips or parts, forming dies, brake dies, trim dies, bolsters, machinery parts and components, etc.

Any inquiry with 42CrMo4 material for FaceMask Machine , please feel free to contact with us directly , thanks !

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Have you found that 1.2344 Round Bar for aluminum extrusion in different price?Of course I have.

Have you found that 1.2344 Round Bar for aluminum extrusion in different price?

Of course,even though same company,they also have different level suppliers,such as the ordinary level,ordinary level with ESR,Quality factory level,Quality factory level, with ESR,supreme level with ESR& low harmful impurity，especial the last one-supreme level with ESR& low harmful impurity,the quality could be the double the aluminum extrusion production.that is why their price also double,someone might think,that means their nothing competitive,we could but the cheapest one,that means the aluminum extrusion production is same.Please don’t forget a very important point,the aluminum extrusion work 24 hours 7 days,as they will lost cost once their stop,and once they need to change a mould for aluminum extrusion,which is made of 1.2344 Round Bar,they have to stop,that they will pay more fee for the power.but if they use the supreme level with ESR& low harmful impurity,they could save more cost.

I prepare base information of 1.2344 Round Bar for aluminum extrusion as below ,or you are welcome to contact me to discuss more about it.

Chemical composition

Applications

1.2344 Tool Steel is used in die casting dies for aluminium, magnesium and zinc, extrusion dies for aluminium and brass, liners, mandrels, pressure pads, followers, bolsters, die cases, die holders and adaptor rings for copper and brass extrusion. It is also for plastic moulds, shear blades for hot work and hot swaging dies. 1.2344 is also used in the production of hot stamping and press forge dies, split hot heading dies, gripper dies, hot punching, piercing and trimming tools.

Processing

1.2344 tool steel round bar and flat sections can be cut to your required sizes. 1.2344 ground steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. 1.2344 Tool Steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

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What does the epidemic mean for the 42crmo4 steel plate trade? Challenge or chance?

The popular issue people talk about is whether the epidemic will affect the development of economic .the report about this question is covered in the news .without doubt, it indeed causes a lot of trouble for everyone’s life. the festival should be a chance for tourism, traveling, cousin and so on. However, with the outbreak of coronavirus, everything changed, people have to stay at home. The company delays the working date, the school delay the study date. What does the epidemic mean for42crmo steel plate trade? Challenge or chance?    maybe it is a chance more than the obstacle.

At first, I  think the epidemic will affect the 42crmo steel plate trade. I am a little worry about it .however, it stimulates the development of  42CRMO4 steel plate trade. Our colleagues in the factory are busily delivering the 414o steel .because the steel is related to our life even during the time of the epidemic, such as making the mask.

The epidemic affects the steel industry, let’s share the statistics together.

china’s crude steel production

China’s crude steel production for January 2020 was 84.3 Mt, an increase of 7.2% compared to January 2019*. India produced 9.3 Mt of crude steel in January 2020, down 3.2% on January 2019. Japan produced 8.2 Mt of crude steel in January 2020, down 1.3% on January 2019. South Korea’s crude steel production was 5.8 Mt in January 2020, a decrease of 8.0% on January 2019.

In the EU, Italy produced 1.9 Mt of crude steel in January 2020, down by 4.9% on January 2019. France produced 1.3 Mt of crude steel in January 2020, a 4.5% increase compared to January 2019.The US produced 7.7 Mt of crude steel in January 2020, an increase of 2.5% compared to January 2019.Brazil’s crude steel production for January 2020 was 2.7 Mt, down by 11.1% on January 2019.Turkey’s crude steel production for January 2020 was 3.0 Mt, up by 17.3% on January 2019.

Mr Jack Tan

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Although the disease obstacle our daily life ,but it can affect the relationship of people with people. Thank you for the reliability to aotai company.p20 steel round bar is  still one of the best-seller product in our company in 2020.

To eliminate the coronavirus, my company delayed the date of working time, finally, we can work from Monday this week. The long time stuck at home was a really hard time for us, we can’t walk out freely to keep healthy. During the vocation, I open the company email and received many emails from our clients .p20 steel round bar is one of the best-seller products in our company. I received a lot of inquiries about the p20 steel round bar.

We have a client in Bangladesh who wants to buy the p20 steel round bar from our company to make a mold machine. he bought the steel from our company in 2019. Although the disease obstacle our daily life, but it can’t affect the relationship of people with people. Thank you for your reliability to aotai company.

Why does our client repeat the order to our company? What’s the P20 steel round bar? It is commonly used for plastic injection mold cavities and tooling and die casting dies for zinc. P20 is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW.

Application

1 It applies to plastic molds and mold holders for TV front cases, telephones, water dispensers, vacuum cleaners, etc.

2 Thermoplastic injection mold, extrusion mold. 

3 Thermoplastic blow mold.

4 Heavy load mold main parts.

5 Grate cold structural parts. Commonly used in the manufacture of TV casings, washing machines, refrigerator inner casings, buckets, etc.

There are three kinds of thickness you can choose as you want about the P20 Steel round bar, we show the details as follows,20-120mm, 130-150mm, and 155-180mm. I have good news to share with you, we have cooperation with the famous steel mill in china, so the quality is assured. Also, MOQ is not limited at a suitable price. We have a large of material steel in storage, so it’s convenient for you to place an order.

Mr Jack Tan

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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

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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

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Tel: 0086-769-23190193

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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

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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 .

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