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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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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 .

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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

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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

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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.

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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

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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.

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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

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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 .

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 .

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

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 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