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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.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

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

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

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.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

Traditional Year – End Corporate Banquets with 42CD4 Hot Rolled Round Bar . After 2020 New Year holiday . All the company in China will have  traditional long term holiday . Chinese Spring Festival holiday . And before all people leave for holiday . Every company may have a traditional Year-End Corporate Banquets .

All members of the company will attend . Everyone will dress up . The company will prepare a rich dinner and many prizes . And everyone will have chance to attend a lucky draw and play games while dining . After this banquets , everyone may have their prizes . Someone were Work hard to win the Merit Award . Someone are get Rewards for Playing Games and  in the lucky draw .

In the past year , all people working hard . So The boss wants to thank everyone . In Otai Special Steel , we have sold very well for our 42CD4 Hot Rolled Round Bar .  And with sheet plate , all we have sold out more than 1500Tons .

In the Otai Special Steel’s traditional Year-End Corporate Banquet . 42CD4 Hot Rolled Round Bar was the protagonist . In the Year-end sales summary report , 55% sales volume was it . In the beginning of Banquet , for Boss’s speech , he mention the Key Products Promotion  of it . So this year of 2020 , our key point products was 42CD4 Materials again .

42CD4 Hot Rolled Round Bar 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 42CD4 steel gives greater strength and heat treatment capabilities . In comparison to AISI / ASTM 4130 alloy steels . However it does have inferior weldability characteristics .

42CD4 Hot Rolled Round Bar and flat sections can be cut to your required sizes . 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 . SAE 4140 steel is also available as Ground Flat Stock / Gauge Plate . In standard and nonstandard sizes .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

H13 STEEL APPLICATION IN LIFE-Chapter 4

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-H13steel

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

42CrMo4 SHEET Q+T  Steel, not only at home, but also abroad, otai’s 42CrMo4 is very popular.

What’s the meaning of 42CrMo4 SHEET Q+T ? it means this material is in the quenched and tempered condition (+QT). 42CrMo4 is our main best-seller product.since last year. To improve the efficiency of otai company, my boss changed the schedule of the company.We sold different sizes of steel, while no one is the main product. Considering the development of the otai company, my boss selects the 42CrMo4 as our main product.

We devote to improve the skills of 42CrMo4, otai’s 42CrMo4 is produced by the only one imported advanced steel making equipment. otai stocks 42CrMo4 and keep a daily inventory of 800 tons which is hard for competitors. Not only at home, but also abroad, otai’s 42CrMo4 is very popular.

42CrMo4 material (1.7225 steel) is an European standard alloy steel.the delivery status of this steel is mostly tempered (+ QT is short for quenched and tempered). it has high strength, high toughness, good hardenability. It aslo has temper brittleness, high fatigue limit, good impact resistance after quenching and tempering, and good low-temperature impact toughness.

This steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain degree of strength and toughness.such as transmission gears, rear axles, load-carrying connecting rods, spring clips, and oil deep well drill pipe joints.

Material 42CrMo4 SHEET Q+T Heat Treatment

Quenching temperature: 820 to 880 ℃ (Austenitizing period: at least 30 min; Quenching agent: Oil or water)

Tempering temperature: 540 to 680 ℃ (at least 60 min)

End quench test: 850 ± 5 ℃

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. Welcome to send an inquiry.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

4140 Round bar Q+T is a alloyed steel for beneficiation that has medium hardness, reaching good tempered layer depth. It is a steel suitable for severe fatigue, impact and stress applications at high temperatures. It is widely used in the oil, steel and capital goods industries.

We could make the different finishes for the 4140 Round Bar Q+T: like as Laminated, forged, drawn and peeled.

From the next week 18th,Jan, our company is closed for the Chinese New year holiday, we will resume to work on 3rd-Feb. Today, I am arranging the last shipment for the 4140 Round Bar Q+T before this CNY holiday.The client is very much appreciated for my kind help on rushing for this 4140 Round Bar Q+T goods. And I finally can go to my hometown for enjoying my long vacation without any worry. Each year, I really enjoy having a big meal with my family. And then watching the Spring Festival gala and visiting all my relatives also make me happy and relaxed.It’s so important for all Chinese people, we have to come back to hometown no matter how difficult it is.It is a family tradition and culture.I do love to share my happiness with my dear clients after come back from CNY holiday.

Here I am also much grateful for my customers’ support during 2019. I am so happy to see they have good benefits from us. As Many customers have found major benefits in sourcing from OTAI Special steel rather than direct from a Chinese mill. These benefits include time saving, reduced costs and flexibility. And we could make the possibility to make regular changes. For example in scheduled quantities, keeping abreast of technology changes, assistance with design and technical issues, all without sacrificing choice or quality. What’s more, OTAI’s purchasing power combined with in-depth knowledge of each mill’s strengths and specialities. It means all this is achieved at a very competitive price and the guaranteed quality.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

A close friend who always buy 42CrMo4 Round Bar Q+T from my company,I still remember the beginning of our cooperation.

A close friend who always buy 42CrMo4 Round Bar Q+T from my company,I still remember the beginning of our cooperation. At the beginning of that period,our delivery day of 42CrMo4 Round Bar Q+T is very very slow,around 30days for processing. In a general way,there no Q+T condition in stock,most of them is Hot roll black surface,forged black surface.so we have to take our goods to the heat treatment factory,as the we know the heat treatment factory is stable and have good repitation,but their delivery time is very slow,and the heat treatment fee is also expensive.sometimes I lost the orders of 42CrMo4 Round Bar Q+T because of delivery days,my friend really want to gave me those order,but he can not wait such long time,as most of his orders are so urgent.

The most important is about staff

After a year,finally,we found another heat treatment factory,and their delivery time for us only need 7 days,we gave them a small order for testing,and the hardness was also met our requirement.and we also sent our engineer to check theirmechanical equipment,and the most important is about staff,our enigneer asked a lot of question of technology,their worker are knows the technology well,and some of them are experienced.

Since we have cooperated several times, we have replaced most of the heat treatment work with them, such as Q+T, annealing and normalization.They never let us down.

If you want to know more about 42CrMo4 Round Bar Q+T,please click the link or contact me.

Mechanical properties of   steel   42CrMo4  (1.7225)

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

H13 STEEL APPLICATION IN LIFE-Chapter 3

The force to move the tip/particle away from the surface was recorded. Toner particles were nanotextured to various degrees by mixing with fine SiO₂ particles (mean diameter of 20 nm) which adhered to the toner particles. As the fractal dimension increased, the shearing and adhesion force between particles was also seen to increase.

Mateˇjka et al. examined the wear characteristics of SiC-reinforced iron-phenolic based brake disks using an AFM [16]. Abrasives, such as SiC, are added to brake disk composites in order to increase the friction coefficient and stabilize it at higher temperatures. At temperatures above 250°C an enhanced pull-out of SiC was noted from the AFM results. The AFM results also showed that these particles could help maintain the friction coefficient at higher temperature due to their abrasion of the disk surface. A potential drawback of quicker abrasion of the contact surface was also reported. An optimum of approximately 3.4% SiC addition was determined from this work.

Tool steel – H13

H13 is a hot work tool steel that has good resistance to thermal fatigue, erosion and wear, and is widely used for making molds and dies. The H13 powder used for laser consolidation contains 0.42% C, 5.04% Cr, 1.33% Mo, 1.06% V and 0.88% Si. LC H13 samples were metallurgically sound and free of cracks or porosity. LC H13 tool steel showed directionally solidified dendritic microstructure with layered features: very fine columnar dendrites (around 1–2 μm in dendritic arm spacing) aligned along vertical direction (Fig. 17.4(a)). Cellular features were observed along the transverse cross-section.

The XRD results indicated that the LC H13 steel consisted of a majority of α (martensite) plus trace amount of γ phase (Fig. 17.4(c)), which was very similar to the H13 powder used for the consolidation with the exception of the reduced amount of γ phase. Further XRD analysis indicated that the carbides extracted from LC H13 material were of MC, M₇C₃ and possible M₃C types.

The LC H13 tool steel showed excellent tensile properties (Table 17.2). The average yield and tensile strengths of the as-consolidated H13 along vertical direction were about 1288 MPa and 2064 MPa respectively, while the elongation was about 6% and the elastic modulus (E) was about 216 GPa. Along the horizontal direction, the LC H13 showed significantly higher yield strength (1564 MPa) than along the vertical direction, while the tensile strength, elastic modulus and elongation of LC H13 were comparable for both directions. It should be noted that the tensile properties of the LC H13 material had relatively small scatter. For example, along the vertical direction, the standard deviations of the yield strength and tensile strength were about 54 MPa and 51 MPa respectively, while the standard deviations of the elastic modulus and elongation were 4 GPa and 2.2% respectively, which indicated that the laser consolidated H13 material had a reasonably good consistency.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com