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TAI Special Steel supplies 42CrMo4 Plate Hot Rolled or Q+T delivery condition. For we fulfill the coming request from clients in 2020 new year. So happy to advise that our company prepared the stock for this running steel grade.

42CrMo4 Plate Hot Rolled is used to manufacture forgings that require higher strength and larger Q+T cross section than 35CrMo steel.Such as large gears for locomotive traction, supercharger transmission gears, rear axles, highly loaded connecting rods and spring clips. It can be used for drill pipe joints and fishing tools of deep oil wells below 2000m.

We could provide this 42CrMo4 Plate Hot Rolled in different shape, such as plates, flat bar, round bar and hexagon. Tell you the truth, we do have the very good competitive advantage on this steel plates.

First, we are the largest stockiest for this 42CrMo4 Plate Hot Rolled in South China.
Secondly, this steel is produced by the only one imported advanced steel making equipment in China.
We exported the 42CrMo4 Plate Hot Rolled material to the Uddeholm which is the 500 groups company.
At last, we sold a lot of this steel grade to the South of America. Moreover, many trading companies in China also purchased this steel from us for exporting to their overseas customers.
Each year, the sales quantity for this steel material is the Top 1 in our company.

We could provide the one stop solution service. Therefore most of the customers place the 42CrMo4 Plate Hot Rolled order to us without any worry. If they need the fixed length and size, or need to cut it in flat bar, we could cut it in our factory by oursides. That is because we have our own cutting machines. Besides, we also have our own testing instruments for making sure the quality.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

My customer is surprised about 4140 sheet hot rolled delivery time,cause he thought it need 30-45 days at least.

I got an inquiry of 4140 sheet hot rolled,it’s from my regular customer today,he is not only a customer,but also a very kind friend of mine.

He told me is not a firm order,as he still need to get approved from his customer,Thought is not a big quantity,I tried to help him with getting this order.

 The inquiry information is very important.

I only have data of thickness:30mm,and there is no width & length data,and the hardness require is 28-32HRC.

I shared some pictures of our 4140 sheet hot rolled,some is the raw material without any cutting,some are the pictures of packing,and some are the 4140 sheet hot rolled by four side cut,as different size with different price.also,I notice the hardness requirements is 28-32HRC,so the condition should be quench+temper。

Delivery Time

Finally,he asked me when I could send the 4140 sheet hot rolled ,we only have 20tons(30mm) in stock,which is quench+temper condition.I asked him if he will to take only 20 tons,I could book shipping immediately,but if his final customer insist on 25 tons at least.I am afraid it would take 10 days to do heat treatment.

My customer is surprised about it,cause he thought it need 30-45 days at least.I told him we have hundreds tons of 4140 sheet hot rolled in stock every month,and some of them had been finish Q+T heat treatment,I can not say we are the largest 4140 sheet hot rolled stockist in China.but in south of China,it might be.I also told him,most of the trading company are buying from us,and sale to other countries,if he don’t believe,it’s good to compare the price,it will see the truth,but he said he won’t do that,as we had cooperate for 3 years,he know me well.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

H13 application –chapter11

1. The lubrication and cooling of H13  steel moldIn order to decrease the heat load of mould, people always will make  H13 cooling directly in the interval of work. However,  H13 will cause a bad impact on the mold.  H13 should be cool slowly to avoid thermal stress and cracking. Need to use the graphitic lubricant to make sure the H13 steel die work in the right way.  H13 power of radiating is great.  H13 will decrease the temperature of H13 mold at the time of work.

How to fix it- H13?

• Analysis of chemical composition and quality of material- H13

Raise the purity of H13 steel. Decrease the content of sulfur which is the most efficient way to increase the working life of H13 steel mold. The sulfur content is at the range of 0.005-0.008% of high-quality H13 steel. According to the analysis of chemical composition and quality of material can get the result of if it is eligibilityfor H13. That  H13 will help us to make the right decision on the technology of heat treatment and forging. Test Method: Sampled the H13 steel stuff to analyze its chemical composition and if  H13 complies to the requirements. And take the sample at the steel center. Then grinding, polishing, etching with 4% nitric acid alcohol solution, examining the microstructure on an optical microscope, and assessing the grade of carbide segregation and the grade of inclusion according to relevant national technical standards.

• The way of technology control- H13

1. Forging Technology The ingot that diameter bigger than 70mm must preheat at the temperature range of 800-900℃. Then,  H13 it is heated at an initial forging temperature of 1065 to 1175 ° C. And the total forging ratio must bigger than 4.
2. Spheroidizing Annealing It  H13 can make the strength get lower and improve the cutting machining properties. Do a good start for quenching and tempering. The spheroidizing annealing process is maintained at 845℃ to 900℃(1 h +1 min)/mm. And then cooled to 720℃ ~ 740℃ isothermal (2h + 1 min)/mm at the furnace. Cooling to 500 ° C at the furnace, and finally out of the furnace to air-cooled.
3. Quenching and Tempering Technology There is the best way of H13 steel heat treatment technology. After heating at 1020°C~1080°C, then oil hardening or martempering. Tempered twice at 560-600 °C. The microstructure is tempered toughness + tempered sorbite + residual carbide, and the microhardness is 48-52HRC.

The manufacture of H13 steel die must do a good job at design, the material chosen, forging, annealing, heat treatment and etc to make sure the quality at a high level. Every step is important and has a big influence on the mold product for H13 .

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

Everytime in the first month of New Year . And approaching Chinese Spring Festival holiday . This is the best purchase period of 42CrMo4 Round Bar Hot Rolled . In China , because of end of year , all the production are sales promotion . The factory in order to clean up inventory , so the price was very nice . You may take them for stocklist .

Because after this time , we will leave for Chinese Spring Festival holiday . And the price will increase again after holiday . So if you have any demand of 42CrMo4 Round Bar Hot Rolled . Please contact with Monica as soon as possible . We may leave for holiday on 17th Jan. 2020 .

We have more than 16 years experience in 42CrMo4 Round Bar Hot Rolled . Also we have adequate stock of flat bar, square bar supply . 42CrMo4 Round Bar Hot Rolled  alloy steel is chromium . molybdenum . manganese containing low alloy steel . It has high fatigue strength , abrasion and impact resistance toughness , and torsional strength .

42CrMo4 Round Bar Hot Rolled  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 Round Bar Hot Rolled  Annealing delivery hardenss less than 250HB .

42CrMo4 Round Bar Hot Rolled and flat sections can be cut to your required sizes . The similar materilas 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 . 4140 Round Bar Hot Rolled is also available as Ground Flat Stock / Gauge Plate . In standard and nonstandard sizes .

We may leave for Chinese Spring Festival holiday from 17th Jan. 2020 to 5th Feb. 2020 . Any interesting , please confirm back to us in 10 days . Very best price will end in 10 days . Please contact with us as soon as possible .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

As Chinese Lunar Year coming soon ,we got the feedback from our customer who order 4140 Round Bar Hot Rolled Alloy Steel from us that they need to delay their import process ,and let us help to ” Freetime extention ” of containers shipment .

4140 Round Bar Hot Rolled Steel shipment

We got the news from our customer 2 days ago as follow :

Dear Elwa : MSC  local agent received confirmation from that  free time appears here only  7 days . Please contact your installer agent for free time extension in China.

Some of manufacture industry starting holiday from Jan,2020 (about 20-30 days holiday ) during spring festival .The shipment company and vessel company also start to arrange the holiday schedule .

We  inform to all of customer that please do the import custom process on time ,especially during Chinese Spring festvial .Time is money ,there is not need to pay more other fee for local fee or demurrage because of the import process delay .

Because all extention process of the demurrange / Storage free day will stop during holiday , there is nobody to handle those specail request while on holiday.

Ms Elwa Lee

Mobile/WhatsApp: 0086-15899675236

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Elwa@otaisteel.com

4140 plate hot rolled, Otai has storage over 500 tons daily, if you have the demand, please feel free connect with us, the delivery time is very short, once you place an order, you will repeat again。

Time flies, this is the third month I worked at Otai special steel company. From the first day I came to Otai, I heard a lot about the 4140  steel.This is one of the best-seller product of our company, not only my boss but also my colleagues, love the 4140 steel very much, do you know the reason? because 4140 is popular by many customers,otai provides high quality 4140 steel, our 4140 is produced by china’s famous mills such as baogang steel, wugang steel.

Maybe you do not know much about the 4140 plate hot rolled, I ‘m glad to share the information with you.

4140 steel is common chromium-molybdenum steel that usually used after quenched and tempered, with high intensity, high hardenability. It has good workability, slight processing deformation, fatigue resistance is quite good, is a medium and so on hardenable steel.

4140 is used to manufacture forgings that require higher strength ,and larger quenched and tempered section. such as large gears for locomotive traction, supercharger transmission gears, rear axles, heavily loaded connecting rods and spring clips.

4140 is also used to Petroleum deep well drills pipe joints ,and fishing tools below 2000m and can be used in the mold of the bending machine.

What’s the meaning of hot rolled?

it’s a method of manufacture steel. Hot-rolling refers to a mill process in which you roll the steel at a temperature above its recrystallization temperature; a heat that typically exceeds 1000° F.

hot-rolled steel most suitable for structural components ,and other applications where incredibly precise shapes, and tolerances are of less importance.

4140 plate hot rolled, Otai has storage over 500 tons daily, if you have the demand, please feel free connect with us, the delivery time is very short, once you place an order, you will repeat again.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

OTAI Steel focus on alloy steel business more than 20 years, become one of leading special steel stock holder in South of China step by step. Steel 4140 | 42CD4 plate hot rolled become our key product. We keep daily stock 500 tons, black surface plate can support immediately shipment after order confirmed, and milled plate can proceed per customer’s requirement. OTAI have 10 band saw and milling machine, cut to different size and milling precision requirement per different customer. 4140 | 42CD4 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 | 42CD4 Annealing delivery hardenss less than 250HB.

In this article let’s introduce 4140 |42CD4 plate hot rolled supply information

4140 |42CD4 plate hot rolled dimension

1) Steel Plate:

Thickness 12-120mm

Width 2000-2300mm

Length 3000-5800mm

2) Flat Bar

Thickness 12-120mm

Width 200-1000mm

Length: 2000-2300mm

3) Fixed Size

Per customer’s requirement

 4140 |42CD4 plate hot rolled delivery condition

1) Black surface as rolled
2) Milled plate per different milling precision requirement

4140 |42CD4 plate hot rolled heat treatment in our stock

1) Without any heat treatment
2) Annealed
3) Quenched and tempered (Q+T)

4140 |42CD4 plate hot rolled delivery time

1) Black big steel plate: Available in stock, immediately shipment

2) Flat bars cut per need: 3-7 days

3) Milled plate per need: 3-7 days

4) Lead time for Q+T: 10-15 days

If any special dimension and other technique specification requirement, please contact us for detail discussion. OTAI Steel are professional and competitive enough for 4140 |42CD4 plate

OTAI 4140 |42CD4 plate hot rolled steel is directly from top 3 China mill, quality is good and stable, price is competitive. This March, OTAI Steel will increase the daily stock to 800 tons.

New year, new opportunity. Let’s work together.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

I talked about Cr12MoV with my  friends, and a friend said that it was “junk material”

I talked about Cr12MoV with my  friends, and a friend said that it was “junk material”!

I did not agree with. Cr12MoV has five benefits at least in my mind. The first one,the hardness  is 58-60 HRC， High hardness represents high wear resistance. When heat treated, the hardenability is good, heat treatment deformation is small, the risk of cracking is reduced, and the ratio of carbon is Cr12 is low, and Cr12MoV crack resistance is better than Cr12. For many applications that require wear resistance, Cr12MoV is good for it. The fourth one has a lower price and can reduce the cost of mold making greatly. The fifth one has a wide range of uses. All Cr12MoV can be used for extrusions dies, cold extrusion dies for common requirements, circuit board dies, and parts that require wear resistance. It is such a good material.

I always believe that there no the best materials in the world,but the most suitable does.

Cr12MoV Tool Steel Chemical composition

Mechanical properties:
Hardness: annealing, 255 ～ 207HB (14-25BRC), indentation diameter 3.8 ～ 4.2mm; quenching, ≥60HRC

Cr12MoV uses
Cr12MoV mold steel has higher hardenability, hardness, strength and toughness after quenching and tempering than CR12. Workpieces with a diameter of 300 ~ 400mm can be fully hardened, and the quenching deformation is small, but the plasticity at high temperature is poor. Cr12MoV is mostly used to make compound molds and tools with large cross sections, complex shapes, and heavy workloads. Such as punching die, trimming die, piping die, steel plate and so on.
Heat treatment specifications
Heat treatment specifications: 1. Quenching, oil cooling at 950 ～ 1000 ℃; 2. Quenching at 1020 ℃, tempering at 200 ℃ for 2h.
Metallographic structure: fine granular pearlite + carbide.
Delivery status: The steel is delivered in annealed condition.
Specification for softening of cold extruded blanks
Use iron dust protection for heating, temperature 760 ~ 780 ° C, time 10h, furnace cooling, hardness 96bw, can realize cold extrusion smoothly

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

Din 1.2344, otai with over 20 years pre-sales and after-sales experience.

Recently, I am careful about the news of middle east, because we have a customer from middle east who bought the din 1.2344, I heard that one of middle east country’s situation is serious, the news shows US and one middle east country on the brink of war, thousands mourn soleimani vow revenge to America, I am shocked with the news, the people in that country are upset with about the safety, our customer is forced to other countries to keep safe.

I hope the situation will change better, the war is terrible, no one benefits from the war. Only the safety is assured, will the country have a prosperous future, and people live a happy life. Our customer in one middle east bought the din 1.2344 for hot forging dies, he believes the quality of our din1.2344.

Din 1.2344 consists of chromium, molybdenum, and vanadium and is known for its high hardenability and great toughness. Otai Special Steel could supplier of 1.2344 Hot Tool Steel in round bar, plate, flat bar, sheet, square and block, the measure should be regular standard. Special sizes could be custom-made.

Its main characteristics are as below:

(1) has high hardenability and high toughness;

(2) Excellent resistance to thermal cracking, which can be water-cooled in the workplace;

(3) It has medium abrasion resistance, and can also be used to improve the surface hardness of carburizing or nitriding process, but slightly reduce the resistance to thermal cracking;

(4) Because of its low carbon content, the secondary hardening ability in tempering is poor;

(5) It has softening resistance at higher temperatures, but the hardness is higher than 540 °C (1000 °F), and the hardness is rapidly decreased (ie, the working temperature is 540 °C);

(6) The deformation of the heat treatment is small;

(7) medium and high machinability;

(8) Medium resistance to decarburization.

Din 1.2344  steel is the most widely used and most representative hot work die steel.Even more noteworthy is that it can also be used to make important components in the aerospace industry.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

A new customer asked me which country bought low carbon steel from us before,I have no idea about the point of this question.

A new customer asked me which country bought low carbon steel from us before,I have no idea about the point of this question,but we did sale a lot of 1020 round bar and low carbon steel pipe to some counties.most of them are from South America.Such as Chile, Mexico, Argentina.And 80% reorder of 1020 low carbon steel pipe every 2 month.After offering quotation,he said our price was to high,someone offer him a cheaper price,I asked how much lower.he told me $150/ton around.I told him that the price was not make sense at all,I am sure he will never get the steel .

After afew month,he contact me again,he sent the same inquiry to me,I asked him why disappear last time?he told me that after he finished the payment,he never catch the company anymore,and this time,he is very careful,not only care about the unit price anymore,he ask me to send sample.I did not send him sample,I told him,it’s very easy to buy a sample in Chinese market,after that,I show him our stock picture and I,and share the loading pictures and BL copy.

Finally ,he got the low carbon steel pipe,by paying the second time.and he told me he will never change supplier,we made him feel save.

If you want to know more about low carbon steel,please click the link or see as below

AISI 1020 Steel is a mild carbon steel, 1020 steel belong to the high quality low carbon steel, cold extrusion, carburizing and hardening steel. The low steel strength, toughness, plasticity and weldability are good. Tensile strength of 253-500 mpa, the elongation is 24% or higher.

Chemical composition

Equivalent Of 1.1151 Carbon Steel | Flat Steel Bar

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com