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1.7225 Shaft Hot rolled is regularly available in two forms: the most common is tempered, designated simply as 1.7225. While the pre-tempered form is thermally assisted in the foundry and is designated as 1.7225 HT. It is suitable for hardening by heat treatment.

Our OTAI Special steel company supply the 1.7225 Shaft Hot rolled, annealed, Q+T different condition in different shapes. Such as in plates, flat bar, round bar, tubes and hexagon form.We committed to being responsible for each order and each customer.

In fact, everyone should have the grateful heart, people need it, and this society needs it even more. I do always agree with the causal loop between the reason and result. What kind of ways did you do in previous lives? Then the final results that our future generations may have. So I also much agreed with the value of our company has. OTAI  Special steel gives the thanks to every outstanding employee with gratitude. Of course, the most important point is to return to our society. So our company often did his what can do to donate some books and clothes to those poor children in remote area . And we also visited the Nursing home for the elderly and brought them holiday blessings and gifts. So that those people in need can feel the care and warmth of the people and this society.

Therefore, as the always we do for our clients. We provide our service in a very clear and sincere heart. We offered our price in the very competitive one. We shipped the steel material with the guaranteed quality. And we committed to being responsible for each order of each client. We wanted to be the 1.7225 Shaft Hot rolled supplier that customers can rely on.

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The 4140 Plate Annealed belongs to the group of low alloy steels. It is a medium carbon steel, chromium alloy and molybdenum.It is with very resistant to torsion, good resistance to wear and impact, responds excellently to all heat treatments.

Recently, even now it is Winter in Canton province, but the weather is still in average 25 degree. Many people made the joking this winter is hot because of the fire disaster in Australia.

One of our Australian clients shared the info as below, and he purchased the 4140 plate Annealed from us in each two months. And the client is rest assured about the quality we supply. As the 4140 Plated Annealed, which is made by the only one imported steelmaking equipment in China.

The fire that lasted for more than four months in Australia has caused the disappearance of more than one Irish forest. Australia is currently in the summer high temperature season and the local average high temperature exceeds 41 degrees. The Australian government has warned that the fire will not quickly abate.The government calls on residents near the fire-stricken area in eastern Australia quickly left their homes before temperatures rose. More than 2,000 dwellings have been burned. Experts believe that more than one billion animals have been killed in flames across Australia. Australia is the world’s major rare animal habitat. Australia ’s kangaroos, koalas and other rare animals are found all over the world. There is nothing unique. Even if some of them can survive, the natural environment on which they depend has been severely damaged.

Talking about the destruction of this environment, there may be the impact of the above natural environment. But now there are more and more human factors affecting and destroying the environment. For example, the increasing amount of domestic waste causes pollution to our air and water. It causes a vicious cycle of the natural environment. Here we OTAI Special steel call on everyone to protect the environment. As everyone has the responsibility on this. Protecting the environment starts with the every small things around us.

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H13 STEEL APPLICATION IN LIFE-Chapter8

Casting Manufacture-H13 tool steel

John Campbell OBE FREng DEng PhD MMet MA, in Complete Casting Handbook, 2011-H13 tool steel

High-pressure die-casting dies-H13 tool steel

High-pressure die casting is known in the USA, confusingly, as die casting.

H13 tool steel  -Dies for pressure die casting are hardly inert, partly because of  H13 tool steel the gradual dissolution of the unprotected steel die, but mainly because of the overwhelming effect of the evaporation of the die-dressing material. H13 tool steel  may be an oil- or water-based suspension of graphite sprayed onto the surface of the die, and designed to cool and lubricate the die between shots. The gases found in pores in pressure die castings of H13 tool steel  have been found to be mainly products of decomposition of the die lubrication in H13 tool steel  and the volume of gases found trapped in the casting has been found to correspond on occasions to nearly the volume of the die cavity.

A little-known problem is the boiling of residual coolant trapped inside joints of the die. Thus as liquid metal is introduced into the die, the coolant, especially if water-based, will boil. If there is no route for the vapor to escape via the back of the die, vapor may be forced into the liquid metal as bubbles. If H13 tool steel happens it is likely that at least some of these bubbles will be permanently trapped as blow holes (note the correct and rather rare use of the term ‘blow hole’ in this instance) in the casting. This problem of H13 tool steel is common in pressure die and squeeze casting processes.

The recent development in pressure die casting to separate the functions of (i) cooling of the die and (ii) its lubrication,H13 tool steel  is seen as a positive step toward solving this problem. The approach pf H13 tool steel  is to use more effective cooling by built-in cooling channels, whereas lubrication is achieved by the application of minute additions of waxes or other materials to the shot sleeve.

When used for its common purpose of casting aluminum or magnesium alloys the dies are necessarily made from good-quality hot work tool steel, H13. In this case of H13 tool steel  have gray iron would not have the adequate surface integrity because of the presence of H13 tool steel  have graphite flakes in the material, and would not have the strength or fatigue resistance. No protective coating is applied to the surfaces of the die. The result is an excellent surface finish. The danger of cold laps of H13 tool steel  is reduced by extremely rapid filling, and by high pressure that is subsequently applied to ensure faithful reproduction of the profile of the mold. Even so, of course, the high speed of H13 tool steel  filling causes other serious problems that we shall consider later.

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A french friend sent me an inquiry about 42CD4 steel about 2 years ago,I was so confuse at that time

A french friend sent me an inquiry about 42CD4 steel about 2 years ago,I was so confuse at that time,I think I never heard this kind of material.and told him that 42CD4 steel we don’t have.
Lately,I got the inquiry of 42CD4 steel again,but I check the chemical component this time,It’s Din 42CrMo4 similar steel,how stiup i was 2 year ago,42CD4 steel is the french standard,42CrMo4 is the germen standard.I had been this company for 3 year,finnaly I got experience about steel,and this time I sure would do the same mistake,I told the french customer about 42CD4 steel information,and share the stock data with him.

If you want to know more about 42CD4 steel,you are welcome contact me.

42CD4 equivalent material

• ♦America♦ : AISI 4140 alloy steel
• ♦JAPAN♦ : JIS SCM440 alloy steel
• ♦GERMANY♦ : DIN WN-r 1.7255 / 42CrMo4 steel alloy
• ♦CHINA♦ :  GB 42CrMo steel
• ♦BRITISH♦ : BS 708M40Supply Size rangeHot Rolled 42CD4 steel bar: Ø5mm-200mmForging 42CD4 steel bar: Ø140mm-3000mmHot rolled 42CD4 steel plate: Thickness 10mm-200mm x width 100-2300mm

  Forged 42CD4 material steel plate: Thickness 150-1500mm x Width 100 x 3000mm

  Others 42CD4 material have not specified size, pls contact me.

  42CD4 alloy steel Heat treatment

• Annealing
  AISI 42CD4 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
• Tempering
  AISI 42CD4 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 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).
• Hardening
  AISI 42CD4 alloy steel can be hardened by cold working, or heating and quenching.

Ms Sharon Wan

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1.7225 Round Bar Annealed, Otai focuses on high-quality steel.

1.7225 round bar annealed, do you know about it? It is common chromium-molybdenum steel. Since last year, we aim to produce a high-quality 1.7225 round bar annealed. Although Otai is not the biggest supplier in China, we believe we can provide a high-quality 1.7225 round bar above the international standard.

When I show a glimpse at the steel news, I notice that the government supports China’s steel industry to focus on high-quality development. We need to improve the quality and efficiency instead of expanding through scale and price competition. The achievements of China’s cutting overcapacity campaign not only benefited Chinese steel companies but also contributed to the revival of the world steel industry, the focus of China’s steel industry should be quickly transformed to upgrading and high-quality development, from cutting overcapacity, which requires higher level of environment protection, better product quality, and ecosystem.

Our company-otai special steel company provides a high-quality 1.75225 Round Bar Annealed. Through the experience of more than 16 years’ development, I believe more and more customers from worldwide will place the order to us in 2020. I hope we have deep cooperation with you during the new year.

Chemical composition

Application of 1.7225 Round Bar annealed

1.7225 Round Bar steel Strength, high hardenability, toughness, and quenching small deformation, high strength and creep rupture strength at high temperatures. Requirements for the manufacture of higher intensity than the 35CrMo steel and tempered forging greater cross-section, such as a large locomotive traction gears, supercharger drive gear, pressure vessels, gear, rear axle, greatly affected by load and spring clip link It can also be used to 2000m deep oil drill pipe joints and fishing tools and can use bending machine mold, etc.

Mr Jack Tan

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H13 STEEL APPLICATION IN LIFE-Chapter 6

As Cu reacts easily with molten aluminum, the presence of copper at the coating surface must be avoided and this requires coating thicknesses larger than 2 mm. Porosity in the coatings was low and the interface microstructure was sound. The authors calculated the solidification time in similar die casting molds consisting entirely of AISI H13 tool steel and with a copper-steel multimaterial construction and showed that the latter architecture allows reducing the solidification time to 1/3 of the solidification time of h13 tool steel  the single-material molds. Taking into consideration the difference of solubility of Cu in the BCC (α) and FCC (γ) allotropic forms of iron, the same authors investigated the influence of a buffer layer of austenitic stainless steel on the microstructure and properties of the H13/beryllium copper alloy interface (276) and concluded that the buffer layer improves ductility and resilience, evaluated by the Charpy impact test, but reduces the interface bond strength and fracture toughness. On the other hand, the presence of the buffer layer improves considerable the thermal fatigue resistance (277). –

Using the tool steel with H13 will be better than more.

Another interesting possibility of multimaterial deposition is the localized application of composite materials in some regions of a tool steel with H13  to improve its surface hardness and wear resistance. This concept of tool steel wtih H13 was developed by Jiang and Molian using a TiC/Ni–17.5Cr–5.5Al–2.5Cr composite (278), and by Vilar and coworkers for Al alloys rapid tooling applications (32,110,111). On the other hand, TOOL STEEL  H13 Vilar and coworkers (279,280) demonstrated the possibility of using variable feed rate laser powder deposition to synthesize in situ variable composition iron-based composites optimized for particular rapid-tooling applications, consisting of a martensitic stainless steel matrix reinforced with NbC.

The most important ceramic-reinforced composites for tooling applications are tungsten carbide–cobalt (WC–Co) cermets with H13 steel . These materials are brittle and thermal shock may result in extensive cracking. Paul and Khajepour (281) studied the effect of processing parameters during multilayer deposition of WC–Co cermets with relatively large cobalt (Co) proportion, to reduce brittleness, on the properties and microstructure of the material. The deposition system was based on a 1 kW average power pulsed Nd:YAG laser.

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SCM440 Hot Rolled Round Bar Alloy Steel in Otai Special Steel in China . Time flies , this is the last 3 days in office before Chinese Spring Festival holiday .  And SCM440 Hot Rolled Round Bar only have less stocklist for sales promotion . Next year 5th Feb. 2020 , we still here wating for you .  Alloy steel never changes . Otai Special Steel always here for you to provide any size for SCM440 sheet plate and round bar and square bar and flat bar and so on , we have adequate inventory to meet all customer needs . Welcome to contact with us immediently .

SCM440 Hot Rolled Round Bar  Alloy Steel in Otai Special Steel in China . SCM440 Hot Rolled Round Bar  Tool steel is a alloy structural steel, SCM440  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, SCM440 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. Thanks for all the customer from all over the world still stand by Otai Special Steel to support with us . Never change like the steel .

SCM440 Hot Rolled Round 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 SCM440 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.

SCM440 Hot Rolled Round Bar have the best quality , and most stocklist . Welcome customers to inquiry SCM440 steel bar, plate, flat steel for the SCM440 steel price. We are professional supplier and exporter for more than 20 years. We offer you worldwide solution for aisi alloy SCM440 steel bar.

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I guess everyone know that C45 is the base steel,it’s nothing special,and also the the chemistry is not complex

• I guess everyone know that C45/1045 is the base steel,it’s nothing special,and also the the chemistry is not complex，In China,it’s not a hard working to control chemicalcomponent .
• But once C45 involve about the physical properties,that is another issue,such as Tensile strength,Yield strength,Elongation,that is about the heat treatment issue.and make sure the hardness is meet customer’s demand.

Moreover,once the C45/1045 diameter over 350mm,you really need to more careful about the quality,there might some blow hole or crack problem,of course ,if you have higher demand,you will also check microstructure.

If you want to know more about C45/1045,please click the link or see as below

Chemical composition of AISI 1045 round bar and equivalent steel grade

Medium Carbon Steel C45/1045 Form of Supply

we can supply the round 1045 steel bar, 1045 steel flat bar, plate, hexagonal bar and square steel block. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances..

C45/1045 steel Applications

AISI C45/1045 carbon Steel have Wide range applications. It is used to different types of Axles, Bolts, Connecting Rods, Hydraulic Clamps and Rams, Pins Various, Rolls Various, Studs, Shafts, Spindles etc.

AISI 1045 steel equivalent steel grade

• Japanese steel standard JIS S45C
• German steel standard DIN CK45 W N-r 1.1191
• Chinese steel standard GB  45
• England steel standard BS 080M46

AISI C45/1045 Steel Regular size and Tolerance

AISI C45/1045 Steel Round bar: Diameter 5mm to 1700mm

JIS C45/1045 Steel Plate: Thickness 2mm to 1400mm x with 200-2300mm  x length 19800 mmm Max.

DIN 1.1191 Steel Flat bar: 2mm -105mm x 5mm-110mm x lengthSteel Hexagonal bar: HEX 5mm to 110mm x Length 12000mm MAX

Others have not specified size, pls contact our experienced sales team.

Heat treament of SAE AISI 1045 steel

Forging
at 850°C – 1250°C, Hold until the temperature is uniform, Then Cool in furnace

Annealing
Heat to 800°C – 850°C , Slowly, Then Hold the temperature until uniform; Cool in heat treatment furnace.

Normalizing

Heat to 870°C – 920°C, Soak evenly, about Soak for 10 – 15 minutes, then Cool in air

Stress Relieving

Heat to 550°C – 660°C, Hold the temperature, Soak enough time, until thoroughly heat, then Cool in still air

Hardening

Heat to 820°C – 850°C, Soak for 10 – 15 minutes per 25mm of section, Quench in water or brine

Tempering

Re-heat to 400°C – 650°C as needs, Soak aboput 1 hours per 25mm of section, Cool in air.

Ms Sharon Wan

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42Crmo4  shaft hot rolled, Chinese traditional spring festival promotion countdown.

Chinese traditional spring festival is around the corner. our work-day will be finished soon.Hope all of our customer prosperous business and happy life. Our Otai company arranged the new proposal of 2020.

I want to share the good news with all of our customers,  the 42Crmo4 shaft hot rolled is our protagonist product .we received the repeat order of  42crmo4 in the new year 2020.we will continue to promote the 42crmo4, welcome the new and old customer send the inquiry.

Chinese traditional spring festival

Do you know about the Chinese traditional spring festival? It is an important festival for us in China, it is the time to meet with family, we will share the joy of festival, enjoy the delicious food with family, and we will clean the house, decorate it, and pay a visit with the relative .in china, no matter how busy you are, we will go back home, and get together with family at Chinese traditional festival.

Every year people have to order the ticket before going home .because it ‘s too difficult to get a ticket at China’s annual Spring Festival travel rush, also known as “Chun Yun” in Chinese. It is a 40-day period ,dubbed by some as the world’s largest annual human migration before the Lunar New Year.

At the Lunar New Year, people say good words to each other, you will feel the atmosphere of the festival is enjoyable. Commonly speaking, the Chinese traditional spring festival is the most important festival in china. 42Crmo4 shaft hot rolled, Chinese traditional spring festival promotion countdown. We hope to receive good news from you.

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. Otai takes responsibility for every order to the end.

Mr Jack Tan

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H13 STEEL APPLICATION IN LIFE-Chapter 5

Advances in Additive Manufacturing and Tooling

10.07.10.1.2 Applications-H13 TOOLING STEEL 

Some early developments in rapid tool manufacturing by laser deposition are due to Mazumder and coworkers (see Ref. (44) for a summary of their early developments)-H13 TOOL STEL .

The authors concentrated on AISI H13 steel,it is a tool steel – a material frequently used in plastic and die-casting molds. Several simulated tools were manufactured including a tool with copper inserts for conformal cooling. On the other hand, Prinz and coworkers demonstrated the possibility of manufacturing plastic molds with embedded copper cooling channels by fabricating a simple injection mold with 152 ∗ 102 ∗ 32 mm in 316L stainless steel with four embedded copper cooling channels (29), while Weiss et al. (31) proposed a concept for advanced composite forming tools consisting of a copper inner body with conformal cooling channels, to ensure fast heating and cooling rates and uniform temperature distribution, and an outer shell of INVAR to closely match the thermal properties and the expansion coefficient of the composite.

The possibility of increasing the productivity of die-casting molds by using multimaterial of tool steel with H13 -laser-deposited constructs was analyzed by Khalid Imran et al. (274). The concept is to produce monolithic die-casting molds with reduced cycle time by depositing an external layer of AISI H13 tool steel on a core of a high-strength beryllium copper alloy.                                Depositing iron alloys on copper alloys substrates presents some difficulties due to the peculiarities of the Cu–Fe phase diagram. Cu and Fe are mutually insoluble below 800 °C and the solubility of Cu on BCC (α) Fe remains very low even at higher temperatures (275). Conversely, the solubility of Cu in FCC (γ) Fe reaches about 13% at temperatures just below the Fe–Cu peritectic. Cu is also largely insoluble in Fe in the liquid phase and a large metastable liquid miscibility gap occurs in the binary L + γ region of the phase diagram. As a result, Cu tends to segregate from Fe both in the liquid and in the solid states. On the other hand, the melting temperature of copper alloys is lower than the melting temperature of steels of H13 TOOL STEEL .

Despite these difficulties, Khalid Imran et al. (274) showed that tool steels H13 can be deposited on copper-alloy substrates, but the substrate undergoes extensive melting and Cu tends to mix in the melt-pool, leading to the formation of copper inclusions within the AISI H13 coating after solidification.

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