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January 10, 2020 at 2:35 am

H13 STEEL APPLICATION IN LIFE-Chapter 4

H13 STEEL APPLICATION IN LIFE-Chapter 4

special alloy steel

Compared to the conventional cast or wrought material, the LC H13 tool steel demonstrated excellent tensile properties. From the references,22–24 the yield and tensile strengths of the annealed cast or wrought H13 were about 370–510 MPa and 670 MPa respectively, while the yield and tensile strengths of the wrought H13 in hardened condition were in the range of 1290–1570 MPa and 1500–1960 MPa, respectively. The tensile and yield strengths of the as-consolidated H13 were substantially higher than the annealed cast or wrought H13, and comparable to the hardened wrought H13. The elastic modulus of the as-consolidated H13 was about the same as the wrought material. However, the elongation of as-consolidated H13 material was about 5–6%, which was lower than the hardened wrought H13. A post heat treatment might be used to improve the elongation of the LC H13 material if required.

The LC H13 showed very good wear resistance. The pin-on-disk wear test results indicated that, under the given test conditions (3.175 mm diameter Cr steel ball of Rc.63; 250 g test load; total 4000 m sliding distance), as-consolidated H13 specimens showed significantly improved wear resistance as compared to hardened wrought H13 specimens. For example, the average volume loss of the as-consolidated H13 specimens was about 0.14 mm3, which was only about 1/3 of the volume loss of the hardened H13 tempered at 482 °C (0.4 mm3) and about one order of magnitude less as compared to the annealed wrought H13 material (1.45 mm3). In addition, the average wear volume loss of Cr steel balls tested against the LC H13 specimens (0.21 mm3) was also significantly less (only 1/3 to 1/4) than that of the balls tested against the hardened or annealed wrought H13 specimens (0.56–0.88 mm3).

Otai special steel –www.otaisteel.com

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January 10, 2020 at 2:21 am

Din S6-5-2 Round Bar Annealed

Din S6-5-2 Round Bar Annealed from China . In the new year of 2020 . Otai Special Steel still stand here to provide any kinds of Special Steel to the client from all over the world . In the first month of 2020 .

We have sales promotion of Din S6-5-2 Round Bar Annealed . This HIGH-SPEED TUNGSTEN-MOLYBDENUM STEEL the same as of W-Nr. 1.3343 . American standards AISI M2 ACCORDING TO ISO 4957 . German standards DIN 17350 . Japanese standards SKH9 . GOST standards P6M5 . Other standards please special ordered .

Din S6-5-2 Round Bar Annealed have total weights : 300 Tons . Mixed different size from 20 to 180MM . And less sheet plate in our warehouse prepare to sells . Please notice that all the stocklist are limited . If the cargoes sold out . The price will restore to market price .

S6-5-2 Round Bar Annealed

Din S6-5-2 Round Bar Annealed . It is High-speed steel with very good efficiency . ductility . resistance to abrasion and torsion . And impact strength used to work with products with a strength of more than 830 MPa . It is used in the production of drills . blades . knives . spiral drills . thread cutting tools . broaching tools , gear tools , milling cutters . mandrel reamers , end milling cutters , and circular saw segments . W-Nr. 1.3343 is prone to decarburization and overheating during heat treatment . After hardening and tempering , it achieves hardness above 63 HRC .

All the stocklist in Otai Special Steel’s warehouse . Din S6-5-2 High Speed tool steel round bar and flat sections can be cut to your required sizes . Din S6-5-2  High Speed ground steel bar can also be supplied . Will providing a high quality tool steel precision ground tool steel bar to your required tolerances . Din S6-5-2  High Speed steel also is available as Ground Flat Stock / Gauge Plate . It is up to you the size in standard and nonstandard . We may leave for Chinese Spring Festival holiday in one week . Any new inquiry , please contact with us as soon as possible .

Din S6-5-2 Round Bar Annealed

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January 9, 2020 at 8:12 am

4140 Shaft Annealed, Otai devotes to satisfied the demand of the customer.

4140 Shaft Annealed is chromium-molybdenum alloy steel. 4140 Shaft Annealed is the main product of Otai special company。

微信图片_20200109154528

We hold the annual party yesterday, to celebrate the end of 2019, and prepare for 2020, all members of Otai special company enjoy the supper together at the wenhua hotel.

After concluded the work of 2019, we set the new goal of 2020 .during the party time, everyone enjoyed the happy time, we played the games, enjoyed the delicious food. I felt otai steel company is not only a company but also is a big family .once I face the difficulty, my colleagues help me, everyone is easy –going, most of my colleagues worked many years at Otai steel company, so most of our customers are old customer, we achieved a lot of improvements last year, I think we can go further at 2020.

4140 Shaft Annealed

4140 Shaft Annealed is chromium-molybdenum alloy steel. 4140 Annealed is often used when high tensile strength or toughness is required. 4140 Annealed will have a hardness in the high teens/low twenties on the Rockwell C Scale.

 application of 4140 Shaft Annealed

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 the 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 mold, etc. Thanks for all the customers from all over the world still stand by Otai Special Steel to support us. Never change like steel.

4140 Shaft Annealed is the main product of Otai special company, After almost 20 years of development and growth, Otai Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with the experienced exporting team and professional technical knowledge, Otai stocks4140 steel plates and keep a daily inventory of 800 tons which is hard for competitors.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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January 9, 2020 at 3:47 am

42CrMo4 Plate annealed limited quantity in stock

Not many people use 42CrMo4 Plate annealed，as my experience,most of them would like to take the natural one or Q+T condition,but

42CrMo4 material

Not many people use 42CrMo4 Plate annealed，as my experience,most of them would like to take the natural one or Q+T condition,but some special factory they would like to take the 42CrMo4 Plate annealed directly,as they demand the hardness:16-22 Hrc,it would be easier to machine easier.

In  fact,we don’t have much 42CrMo4 Plate annealed in stock,we also keep the 42CrMo4 Plate in Q+T or natural condition most,but we have our own heat treatment factory partner,and we had cooperated for over 7 years,so we could make it as annealed condition by 1 week,I guess most of people could accept it.

We exported the 42CrMo4 Plate 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 annealed 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.

Chemical Composition

42CrMo4/1.7225 C Mn Si P S Cr Mo
0.38-0.45 0.60-0.90 0.40 max 0.035 max 0.035 max 0.90-1.20 0.15-0.30

Relevant Specifications and Equivalents

BS EN 10083 Material No. DIN ASTM A29 JIS G4105 BS 970-3-1991 BS 970-1955 AS 1444 AFNOR
42CrMo4 1.7225 38HM 4140 SCM440 708M40 EN19A 4140 42CD4
42CRMO4 STOCK LIST

Certificate & SGS Report

iso-9001-sgs-certify-otai

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

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January 9, 2020 at 3:07 am

H13 STEEL APPLICATION IN LIFE-Chapter2

H13 STEEL APPLICATION IN LIFE-Chapter2

h13 application

Jiménez et al. recently investigated a plasma-assisted physical vapour deposition technique to grow (TiAl)N films on H13 tool steel [14]. This tool steel is commonly used as a forming dye material at temperatures up to 600°C. Above this temperature the surface oxidizes and spalls quickly. In order to enable this tool material to be used at higher temperatures, a protective surface coating is needed. Thermal treatment of the H13 tool steel with and without (TiAl)N coatings were investigated with an AFM used in non-contact mode. Uncoated substrates showed appreciable increase in surface roughness due to oxidation at temperatures above 600°C whereas coated samples retained similar surface profiles after temperature treatments up to 1000°C (see Figure 3.4). X-ray diffraction (XRD) measurements were used to confirm and correlate these topographical measurements with the surface reactions. Extensions of the AFM, force modulation microscopy (FMM) and phase detection microscopy (PDM) were also used to image the surface. In FMM mode the tip is scanned in contact with the sample while a displacement sinusoid of a few kilohertz is applied to the tip or sample. The applied amplitude signal is modulated according to the elastic properties of the sample. FMM can therefore be used to image hard and soft regions at the same time as topological information is recorded. PDM is used when the AFM is operated in intermittent contact mode. PDM refers to the monitoring of the phase lag between an applied signal driving cantilever oscillation and the cantilever oscillation output signal. Changes in the phase lag reflect changes in the mechanical properties of the sample surface.

Tanaka et al. investigated the effect of toner particle morphology on toner fluidity and adhesion strength using an AFM [15].

Particle fluidity and interactions are influenced by surface structure size and morphology as well as the particle size and morphology. A fractal dimension was used to quantify the particle surface shape, which was related to its flow properties, and particle adhesion forces, which were measured with an AFM. The fractal dimensions were directly scaled from the nanostructure on the toner particle surfaces. A toner particle of approximately 5.5 μm diameter was attached to the AFM tip (see Figure 3.5), which was then held close to compacted toner powder (with a pressure of 54.9 MPa).

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January 9, 2020 at 3:02 am

H13 STEEL APPLICATION IN LIFE-Chapter 1

H13 STEEL APPLICATION IN LIFE-Chapter 1

h13 die steel

H13 STEEL APPLICATION IN LIFE-Chapter 1

1.2344 steel has good mechanical properties and is used widely in industry, such as forming extrusion dies, forging die with large impact load, precision forging die and etc. It can satisfy the needs of the quality requirements of the mold. By the way, the surface of the mold passes through nitriding or cyanidation, the service life of the mold would increase.

H13 Steel Heat Treatment

Annealing

Heat slowly to 1550°-1650°F, hold until entire mass is heated through, and cool slowly in the furnace (40F per hour) to about 1000°F, after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.

Stress Relieving

When desirable to relieve the strains of machining, heat slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).

Preheat Prior to Hardening

Warm slightly before charging into the preheat furnace, which should be operating at 1400°-1500°F.

Hardening

H13 tool steel is a steel having very high hardenability and should be hardened by cooling in still air. The use of a salt bath or controlled atmosphere furnace is desirable to minimize decarburization, and if not available, pack hardening in spent pitch coke is suggested. The temperature employed is usually 1800°-1850°F, depending on size section.

Quenching

Quench in still air or dry air blast. If complicated forms are to be hardened, an interrupted oil quench can be used. Quench part in oil and remove from the bath when it just loses its color (1000°-1100°F). Finish cooling to below 150°-125°F in air, then tempers immediately.

Tempering

Tempering is carried out in 1.2344 tool steels from 538 to 649°C (1000 to 1200°F) to obtain Rockwell C hardness of 53 to 38. Double tempering can also be performed in these steels for every one hour at the preferred tempering temperature.

H13 Steel Supply

Round Bar

Specification: Dia Max 800mm; Length: 3000-5800mm
Surface: original black, peeled, polished, machined

Sheet/Plate/Slab

Specification: thickness: 16-800mm; width: 205-810mm; length: 3000-5800mm
Surface: original black, machined, polished

Notice

We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements.

We are a professional special steel stockist and supplier with a high-quality stand for many years. As a professional H13 steel supplier, please contacts us for any request. Songshun Steel always with you.

Otai Special steel welcome you soon.

jack@otaisteel.com

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

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January 9, 2020 at 3:00 am

OTAI supplies 42CrMo4 Plate Hot Rolled, which is the largest stockiest in South China

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

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

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January 8, 2020 at 3:05 am

Hundreds tons of 4140 sheet hot rolled

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

AISI 4140-STEEL-PLATE-STOCK

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

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January 8, 2020 at 1:45 am

H13 application –chapter11

H13 application –chapter11

OLYMPUS DIGITAL CAMERA
  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 .

 

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January 8, 2020 at 1:40 am

2020 New Year Sales Promotion of 42CrMo4 Round Bar Hot Rolled

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 .

42CrMo4 Round Bar Hot Rolled

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 .

4140 plate hot rolled

Tel: 0086-769-23190193

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