Category Archives: Blog

Otaisteel is a stable and reliable supplier for fortune 500 companies at home and abroad, such as Thyssenkrupp, china north industries group corporation limited. Otai exports various tool steel and alloy steel to more than 30 countries from Europe and American, Middle East, and Asia. Our steel materials meet DIN/ ASTM/EN/JIS etc different international standards.

Time flies, and it is another new year right now. Now it is the last month of this year. To welcome the new year and give back customers who have contacts with our company, our company has a 1% discount on 1.6523 steel. Don’t miss it!

Summarizing this year’s customer inquiries, I found that many customers have asked about 1.6523 steel,what’s1.6523？It is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as rolled condition with a maximum hardness HB 255max. 1.6523 steel offers high external strength and good internal strength, making it highly wear resistant. 1.6523 steel has a higher core strength than grades 8615 and 8617.

1.6523 steel alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre hardened and tempered (uncarburized) 1.6523 steel can be further surface hardened by nitriding, but  It will not respond satisfactorily to flame or induction hardening due to its low carbon content.1.6523 steel is suited for applications which require a combination of toughness and wear resistance.This grade is commonly supplied in round bar.

1 1.6523 steel Supply Range

Round Bar: diameter 8mm – 3000mm

l Plate: thickness 10mm – 1500mm x width 200mm – 3000mm

Square Bar: 20mm – 500mm

tubes are also available against your detailed request.

Surface Finish: Black, Rough Machined, Turned or as per given requirements.

2 Application of 1.6523 Steel

1.6523 steel material is used extensively by all industry sectors for light to medium stressed components ,or shafts requiring high surface wear resistance with reasonable core strength and impact properties.

Typical applications are: Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Gears, Splined Shafts, Ratchets, Sleeves ,and other applications where it is helpful to have a steel that can be readily machined and carburized to controlled case depths.

Otai Steel supplies a wide range of carbon, alloy, and stainless steel products, including high-speed tool steel, cold works tool steel, hot works tools steel, plastic mold steel, engineering steel and machine structural steel, etc. 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’s 42CrMo4 special steel is produced by the only one imported advanced steel making equipment. Welcome to send an email to us.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

The different between DC53 vs SKH-9

DC53 vs SKH-9

We can summary 4 points of different of DC53 vs SKH-9.

No.1.There is 2 Hrc between between DC53 vs SKH-9,The hardness of DC53 hardness should be 60-62HRC,and the hardness of SKH-9 hardness would be 62-64HRC.

No.2 The different of alloy chemical composition，DC53 alloy composition is Ce8Mo2Vsi，but SKH-9 alloy composition is W6Mo5Cr4V2,Different alloy chemical composition will offer different performance of resistance.the resistance of SKH-9 is better than DC53.

No.3 The performance of crack resistance,In cold work tool steel,DC53 is a good choice for crack resistance,and the performance of crack resistance of DC53 is better than SKH-9.

No.4 The price different of DC53 vs SKH-9,SKH-9 price is higher than DC53 2-3 times.

If you wanna know more about DC53,please click DC53,or see as below:

DC53 cold work die steel
(1) Machinability and good abrasiveness.
The machinability and the abrasiveness are superior to those of the SKD11, so the processing tool has a long life and the number of processing hours is relatively low.
(2) Advantages of heat treatment
Quench hardening is higher than SKD11, so it can improve the defects of insufficient hardness during vacuum heat treatment.
(3) Advantages of online cutting processing
High-temperature tempering can reduce the residual stress and eliminate the residual Worthfield iron, which can prevent the cracking and deformation of the wire cutting process.
(4) Advantages in surface hardening treatment
The surface hardness after surface hardening is higher than that of SKD11, so the mold performance can be improved.
(5) Advantages in repairing welding operations
Since the preheating and post-heating temperatures are lower than SKD11, the repair welding operation is relatively simple.

Ms Sharon Wan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

In the past 2 month,Chinese steel price kept going down ,and it came to an end temporarily by the end of November.A total of 13 commodities in the rise and fall list of commodity prices in November 2019 saw a month-on-month rise in the steel sector, of which 3 rose more than 5%, accounting for 15.8% of the monitored commodities.

Chinese Steel Price Information：

A total of 13 commodities in the rise and fall list of Chinese steel prices in November 2019 . There is  3 rose more than 5%, accounting for 15.8% of the monitored commodities. The top 3 commodities are re-bar (10.15%), wire (6.32%) and hot rolled coil (5.57%). There were 6 kinds of commodities that declined on a month-on-month basis, 2 kinds of commodities that dropped more than 5%, accounting for 10.5% of the monitored commodities in this sector. The decline of the top 3 products are manganese silicon (-6.53%), stainless steel (-6.22%), stainless steel plate (-3.36%). Both rose or fell 0.9 per cent this month.

The Chinese Steel price of steel hot rolled plate

Domestic plate rolling  prices rose slightly in November. Common middle board (material: Q235B; Specification: 20) the price at the beginning of the month is 3642 RMB/TON, and the price at the end of the month is 3673 RMB/TON, it is increased about 0.85% from the beginning of Nov.2019 .

The reason of Chinese Steel Price in rising on Nov. 2019

• Favorable policies and loose capital lead to Cinese steel price in rised on Nov. 2019 .

  Stable investment and shortcomings have begun to accelerate in the end of year, especially in terms of cracking down on funding sources. Chinese steel price goes up as the stable investment being increased . Recently, a number of heavy new policies have been implemented: 2020. New special debt quotas have been released in advance of 1 trillion RMB, fixed asset investment projects, and new capital management regulations have also been officially issued.

  

• Demand exceeds expectations, “supply and demand mismatch”

  In November, the domestic steel market demand exceeded expectations,and it is one of the price of Chinese steel price goes up . In the warm winter environment, the downstream operating rate remains high, and the demand for construction materials continues to rise. Also shipments have increased from the same period of previous years. On the other hand, traders are expected to be cautious at one time, and “de-stocking” efforts are too large. And social inventory continues under decline, while the leading steel mills have controlled the pace of delivery.  The process of “going north to the south” has been unsuccessful, resulting in a significant supply-side gap. Boosted by favorable real estate data, black futures rebounded strongly, eventually triggering a deeper market

• Forecast

  In November, the domestic construction steel market ushered in a rebound. The fundamental reason is that the initial market was collectively bearish, social stocks were at a low level, and demand was released more than expected, eventually forming a higher price under the mismatch between supply and demand.as thedemand increase ,and the market supply can not follow with the demand’s increase, Chinese steel price going up in short time . At present, the market prices in many places have reached annual highs. As the contradiction between supply and demand has eased, there has been resistance to rising prices.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: elwa@otaisteel.com

EN19 steel is alloy structural steel. It is the most widely used high-strength steel in the automotive field. It applys on the gears and engine structures, crankshafts, knuckles, connecting rods, main shafts, intermediate gears.

OTAI has our own Chemical Spectrometer for testing EN19 chemical composition

OTAI have Chemical Spectrometer for testing the EN19 chemical composition, Ultrasonic Tester and hardness tester. OTAI supply the one stop solution for the steel material. We have our own warehouse, our machine equipment: CNC flame cutting machine, Horizontal Saw and Vertical saw cutting machine, Grinding machine and Milling machine.

What is the EN grades steel material? The EN range of steel specification was first introduced in 1941 as the War Emergency, British Standard Schedule BS970. With the assistance of the Technical Advisory Committee of the Special & Alloy Steels Committee the British Standards Institute published 58 specifications (EN1 to EN58). These steels covered the different types including carbon steels, alloy steels, case hardening steels, spring steels and stainless steels. The grades were arranged sequentially according to the chemical composition, starting with low carbon grades EN1, EN2 and EN3 working up to stainless steel grades EN56, EN57 and EN58.

EN19 chemical composition is as following:

C: 0.36-0.44; Si: 0.15-0.35; Mn: 0.70-1.00; P: ≤0.040; S: ≤0.050; Cr: 0.90-1.20; Mo: 0.25-0.35.

For the equivalent material close to EN19 chemical composition, there are GB 42CrMo, DIN 42CrMo4, AISI 4140, JIS SCM440.

OTAI provided EN19 steel is produced by the only one set of imported steelmaking equipment in China. And our OTAI survive for the honest and quality, that is why we are professional on this special steel field for more than 20years. We exported the special steel to more than 30 countries all over the world, and they are passed the standard of America, Germany and Japan.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email:  phoenix@otaisteel.com

4140 plate is high strength, hardenability, good toughness, small deformation during quenching

4140 plate

this steel has good workability, slight processing deformation, fatigue resistance is quite good, is a medium and so on hardenable steel, 4140 heat treatment has better strength and good comprehensive mechanical properties, good processability, yield High. The highest use temperature is 427 degrees Celsius. 4140 strength, high hardenability, good toughness, small deformation during quenching, high creep strength and long-term strength at high temperature. It is used to manufacture forgings that require higher strength and larger quenched and tempered section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, heavily loaded connecting rods and spring clips. Petroleum deep well drill pipe joints and fishing tools below 2000m, and can be used in the mold of the bending machine.

4140 plate Chemical info

(C)0.38～0.45
(Si)0.17～0.37
(Mn)0.50～0.80
(P)≤0.035
(S)≤0.035
(Cr)0.9～1.20
(Ni)≤0.30
(Mo)0.15～0.25
(Cu)≤0.30

Its corresponding international standard organization grade: 42CrMo4
Corresponding Japanese brand: SCM440
Corresponding German brand: 42CrMo4
Approximately corresponding US grade: 4140
Corresponds to British BS 708M40 / 708A42 / 709M40
Corresponds to French NF 40CD4 / 42CD4
Corresponds to Chinese GB 42CrMo
Corresponds to GOST ГOCT 38XM

Otai is the largest stockist in the south of China.there are a wide rage specification in stock always.

We had 20 year experience of 4140 plate trade and processing ,and had trade with middle east& sounth American countries.etc.we also offer milling and graiding processing,and most of the customer will take it for automobile die.we offer three condition.NO.1,hot rolled,black surface.NO.2.Q+T,No.3,Annealed.and the Q+T hardness would be 28-32 HRC generlly.

Thickness would be 12-350mm are avaliable,and wide would be 2000-2300mm,Length would be 3000-5800mm,we also offer cutting if you need.we have our own cutting merchine,then the delivery day would be sooner than your expection.

Please let us know which condition and which specification would be perfect for you,we also will offer tenical support when you need.

Tel/WhatsApp: 0086-13580960968

Fax: 0086-769-88705839

Email: sharon@otaisteel.com

1.2311 plastic mold steel. It is widely used in China,The Ex-mill hardness HRC 30 ~ 42, which is suitable for large and medium1.2311 plastic mold steel has good machinability and can be generally polished.

The Chemical composition of 1.2311 Plastic mold steel 

1.2311 plastic mold steel can be used for mold processing directly  after pre-harden processing , it is within good dimensional stability . The 1.2311 plastic mold steel with general usage , and the life-cycle of molds  can reach 50W times .

1.2311 Plastic Mold Steel Production process ：

EAF+LF+VD+ HOT ROLLED(CC） + PRE-HARDEN +Black Surface

1.2311 Plastic mold steel suitable for plastic molds and mold holders of TV front cases, telephones, water dispensers, vacuum cleaners, etc.

● Thermoplastic injection mold, extrusion mold.

● Thermoplastic blow mold.

● The main parts of the heavy-duty mold.

● Cold structure parts.

● Commonly used in the manufacture of TV cases, washing machines, refrigerator inner cases, buckets, etc.

1.2311 Plastic Mold Steel Properties:

Quenched and tempered plastic mould steel.

Hardness in condition as supplied 280-325HB(28-34HRC) . Good machinability, better polishability compared with 1.2312. Capable for texturing.

Characteristics:

1.2311 Plastic mold steel is supplied in the heat treated condition to a tensile strength of 950-1100MPa and by further heat treatment a hardness level of approximately 50 HRC can be achieved.

Improved wear resistance can be achieved by flame/ induction hardening to give a surface hardness of up to 54 HRC or by nitriding, to give a surface hardness of approximately 60 HRC whilst maintaining the high, as supplied core strength of 950-1100MPa. 1.2311 Plstic mold steel offers excellent polishability and good surface finish when subjected to electrical discharge machining (EDM) or texturing.

Applications:

Plastic mould, zinc die-casting tooling. High tensile application – heavy duty shafts, gears, axles, crusher rolls, bolts, etc. Plastic moulds, mould frames for plastic moulds and pressure casting dies, sleeves of recipients

1.2311 Plastic Mold Steel Properties:

Quenched and tempered plastic mould steel.

Hardness in condition as supplied 280-325HB(28-34HRC) . Good machinability, better polishability compared with 1.2312. Capable for texturing.

Characteristics:

1.2311 Plastic mold steel is supplied in the heat treated condition to a tensile strength of 950-1100MPa and by further heat treatment a hardness level of approximately 50 HRC can be achieved.

Improved wear resistance can be achieved by flame/ induction hardening to give a surface hardness of up to 54 HRC or by nitriding, to give a surface hardness of approximately 60 HRC whilst maintaining the high, as supplied core strength of 950-1100MPa. 1.2311 Plstic mold steel offers excellent polishability and good surface finish when subjected to electrical discharge machining (EDM) or texturing.

1.2311 Plastic mold steel Applications:

Plastic mould, zinc die-casting tooling. High tensile application – heavy duty shafts, gears, axles, crusher rolls, bolts, etc. Plastic moulds, mould frames for plastic moulds and pressure casting dies, sleeves of recipients

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: elwa@otaisteel.com

20

Seamless steel pipe , there are no welding or joints and is manufactured from solid round billets . The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD.

Seamless Pipe is formed by forcing molten metal through a round die with a plug in the center to form a long tube of continuous metal which is then cut into appropriate lengths; usually either 21 ft or 40 ft. although other lengths are available. Seamless Pipe is more uniform in consistency unlike Rolled and Welded Pipe that has been seam welded. Seamless Pipe can also, usually, withstand higher operating pressures and temperatures than Weld Pipe so it is commonly preferred for use in high pressure systems. Fluid flow through Seamless pipe is generally less turbulent than Welded pipe also.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Otaisteel is a stable and reliable supplier for fortune 500 companies at home and abroad, such as Thyssenkrupp, china north industries group corporation limited. Otai exports various tool steel and alloy steel to more than 30 countries from Europe and American, Middle East, and Asia. Our steel materials meet DIN/ ASTM/EN/JIS etc different international standards.

OT718 mold steel, China’s grade 3Cr2NiMo is an improved steel grade on P20, with significant improvements in quality, which makes it fill the shortage of P20 mold steel and meet the requirements of P20 mold steel. Except that it cannot be used for plastic mold parts with corrosion resistance requirements, it is currently the typical grade of the most widely used general-purpose plastic mold steel.

Now the first thing I am used to at work is to open the mailbox to check the company’s inquiry from the customer. I saw an inquiry from a Malaysian customer about OT718 mold steel, OT718 mold steel? Since I just came to the company for more than a month, I am still unfamiliar with this product, so I went to understand this product, and today I will share with you the OT718 mold steel that our company is making.

The inquiry from Malaysian customers today is that they want to purchase OT718 mold steel from our company for the production of high-end instruments and equipment, but our company is out of stock, and the customer continues to inquire about the time to prepare the goods, expressing the hope that they can be obtained from our company After purchasing this product, we are also dealing with this matter as soon as possible. Our company’s philosophy is that each employee is his own boss, the owner’s heart treats the work and serves the customer, so many customers are willing to cooperate with us for a long time, which is also a very delightful thing.

OT718 mold steel is commonly referred to as “advanced” plastic mold steel, quenched and tempered plastic mold steel, refining, vacuum degassing, pure steel, uniform hardness, excellent polishing performance, good machining performance, nitrogen can be applied Chemical, suitable for surface treatment. OT718 is also known as “P20 + Ni”. It has better hardenability and superior performance and has good polishing, galvanic corrosion, repairability, and machinability. The steel has good machinability and wears resistance, and the hardness distribution is uniform. The processing technology is simple and the price is moderate, so the amount is large. Suitable for large long-life plastic injection molds, such as molds for household appliances and computer housings. It is supplied in the pre-hardened state and can be directly used for mold processing without heat treatment, which shortens the construction period.

Application

1. Templates for large molds, high surface requirements for household appliances.
2.  Suitable for large mirror plastic molds, such as automobiles, home appliances, audio, and video products, etc.
3.  It can be used for plastic molds with mirror polishing requirements, suitable for injection molds, blow molds for PA, POM, PS, PE, PP, ABS plastics.
4. High polishing and demanding mold cavity.

Otai Steel supplies a wide range of carbon, alloy, and stainless steel products, including high-speed tool steel, cold works tool steel, hot works tools steel, plastic mold steel, engineering steel and machine structural steel, etc. 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’s 42CrMo4 special steel is produced by the only one imported advanced steel making equipment. Welcome to send an email to us.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Otaisteel is a stable and reliable supplier for fortune 500 companies at home and abroad, such as Thyssenkrupp, china north industries group corporation limited. Otai exports various tool steel and alloy steel to more than 30 countries from Europe and American, Middle East, and Asia. Our steel materials meet DIN/ ASTM/EN/JIS etc different international standards.

In order to strengthen our foreign trade salesman’s understanding of products and improve our professional skills, company leaders have trained us since yesterday. For a company or enterprise, it is important to continuously strengthen employees’ understanding of products. Only in this way can we better serve customers, improve service quality, and achieve win-win results between enterprises and customers.

H11  steel is a typical alloy Tool steel, Its Hot work Mechanical Properties is very nice. H11 Tool Steel consists of chromium, molybdenum, and vanadium and is known for its high hardenability and great toughness. It shows good hot and cold workability, hardenability well in temperature has a thicker heat forced, oxidation resistance, high toughness and wears resistance. H11  Steel is a hot work Cr-Mo Alloy tool steel belong to ASTM A681-1999 Steel Grade standard. Special Steel China Supplier and factory Otai Special Steel Supply H11 Tool steel in Round bar, Plate, Flat bar, Square, Forging Ring, and others any shape.Usually, it is used for tool holders, ejector pins, bridge kind tools, forging dies, liner holders, hot work punches, etc. Also used for highly stressed structural parts such as aircraft landing gear.

Our company’s main products also include tool steel. Several days ago, a customer from Poland sent us an inquiry for h11, saying that he wanted to buy h11. After communication, I learned that the customer wanted to use this for forging dies. For the manufacture of some hand tools, he has purchased it from other countries before, but he was not satisfied with it, so he talked with our company colleagues for a long time. After knowing that our company is very experienced in mold steel, he bought h11 steel from our company. After receiving the goods, he was very satisfied and expressed that he would like to purchase from our company again next time.

Established in 1999, Otai Steel supplies a wide range of carbon, alloy, and stainless steel products, including high-speed tool steel, cold works tool steel, hot works tools steel, plastic mold steel, engineering steel and machine structural steel, etc. 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’s 42CrMo4 special steel is produced by the only one imported advanced steel making equipment. Welcome to send an email to us.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com