Category Archives: Blog

3D printing technology has been out for many years, and I don’t know why it has been so hot recently! 3D printing is a promising technology. We need to treat it correctly. There is no need to exclude it, but it cannot be confused by some artifacts …

In recent years, 3D printing technology has been hyped up. Experts talk about the magic of 3D printing products and declare that the mold steel material industry is in the dead end. What do you think of 3D printing technology?

why do we as steel professionals listen to certain boasts? They don’t even know what the mold steel material is, they just talk about it when they see that 3D printing can make a product. The significance of industrial molds is to achieve high-volume and efficient production, and greatly reduce the production of finished products. 3D printing currently only solves the production of a small number of samples, and its efficiency and cost are not a level compared with mold production.

Although, 3D printing has brought innovation and vitality to the mold manufacturing industry. Because the trial product can be obtained and confirmed in advance through 3D printing, this reduces repeated mold changes after mold opening and the failure of the mold project.

some publicity claims that 3D printing can directly print molds, that is just to show you the principle of presenting molds. It should be said to be a “model”. You can use this model to make some products, but can it be mass-produced. So the mold steel material industry plays an irreplaceable role in mold contribution. 3D printing technology has been out for many years, and I don’t know why it has been so hot recently! 3D printing is a promising technology. We need to treat it correctly. There is no need to exclude it, but it cannot be confused by some artifacts …

Introduction of Otai Steel

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 Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Otai expands our market worldwide, such as UAE, Canada, Brazil, Colombia, Chile, Spain, Turkey, Algeria, Vietnam, Malaysia and so on. Welcome to send me inquiry.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

1.2311-P20-3Cr2Mo3  www.otaisteel.com

¡Buenos días!

¿Qué haces todos los días?

Hoy escribo una artículo de acero 1.2311-P20-3Cr2Mo3.www.otaisteel.com

1.2311-P20-3Cr2Mo3  www.otaisteel.com

¿Qué es el Acero P20?

El acero P20 tiene muchas propiedades excelentes. En el estado previamente endurecido, el molde se puede procesar sin ningún tratamiento térmico. Lo que reduce el período de ejecución y mejora la eficiencia. Y también se llama DIN 1.2311 y acero SCM4. Después de haber sido procesado a través del forjado, el acero 1.2311 se vuelve denso. Entonces puede pasar la prueba ultrasónica al 100% Y después de la prueba, no quedarán poros ni defectos. P20 herramienta composición química de acero y más información como a continuación.

CARACTERÍSTICAS

El acero SISA P20 pre-templado es de uso general para la fabricación de moldes. Utilizado para el maquinado y electro-erosionado de moldes de plástico y componentes para la fundición de zinc. Se surte pre-templado a una dureza estándar de aprox. BHN 293-321 (HRC 30-34). Normalmente no requiere un tratamiento térmico adicional, sin embargo el acero SISA P20 se puede templar a durezas mayores para incrementar su resistencia. Cuando enfriamiento al aceite es requerido, cuidado especial es necesario para reducir la distorsión o fractura. Provee excelente pulibilidad y buen texturizado.

TRATAMIENTO TÉRMICO Recocer Calentamiento a 790-815°C (1450-1500°F), mantener 2 horas, enfriamiento lento no mayor de 30°C (50°F) por hora hasta alcanzar 650-675°C (12001250°F), mantener hasta normalizar, posterior enfriamiento al aire. Dureza en Estado Recocido BHN 187/223 Relevado de Tensiones Material Recocido: 650-675°C (1200-1250°F) Mantener 2 horas después de calentamiento al núcleo, enfriamiento lento en horno o al aire. Dureza Estándar (BHN 293-321): Calentar a 480°C (900°F), mantener 2 horas después de calentamiento al núcleo. Material Templado Calentar 15-30°C (25-50°F) por debajo de la temperatura de revenido, mantener 2 horas después de calentamiento al núcleo, enfriamiento lento en horno o al aire. Recomendable para reducir las tensiones causadas por un extenso maquinado en caso de herramientas de configuración complicada y para reducir las tensiones después de un proceso de electro-erosión. TEMPLE El acero SISA P20 se surte pre-templado y un tratamiento térmico posterior generalmente no se requiere. Sin embargo, se puede templar a durezas más altas. Nota: El acero SISA P20, debe ser recocido antes de un temple posterior. Precalentar 675-735°C (1250-1350°F), normalizar. Temple (Austenización) 815-845°C (1500-1550°F) – Mantener 30 a 45 minutos a temperatura. Enfriamiento Al aceite a 65-95°C (150-200°F). Revenir inmediatamente. Revenir Doble revenido a 205- 650°C (400-1200°F), mantener 1 hr. por pulgada de espesor (25 mm), 2 hrs. mínimo por revenido.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

AISI 8620 STEEL -1.6523-21NiCrMo2-SNCM220  www.otaisteel.com

Todas las mananas , en mi casa , cuando nos levantamos , si repite la misma situacion .

Así empieza todo .

¿Qué haces todos los días?

Escribo una artículo toda la mañana y cemo a las 12.00 por la tarde .

Hoy escribo una artículo de acero 8620.

AISI 8620 STEEL -1.6523-21NiCrMo2-SNCM220   www.otaisteel.com

AISI 8620 STEEL -1.6523-21NiCrMo2-SNCM220  www.otaisteel.com

CARACTERÍSTICAS

Acero grado maquinaria al Níquel-CromoMolibdeno para cementado. Ofrece muy buena dureza superficial y gran tenacidad al núcleo. El proceso de cementado se aplica para incrementar el contenido de carbón en la superficie para que con un tratamiento térmico adecuado, la superficie sea substancialmente mas dura que el núcleo.

AISI 8620 STEEL -1.6523-21NiCrMo2-SNCM220

TRATAMIENTO TÉRMICO Forjar 1050-850°C (1920-1560°F) No forjar por debajo de 825°C (1520°F), enfriamiento lento en horno o material termoaislante. Recocer Calentar a 870°C (1600°F), mantener 2 horas, enfriamiento lento de 30°C (50°F) por hora hasta 650°C (1200°F), dejar enfriar en el horno o en aire quieto a temperatura ambiente. Dureza en Estado Recocido Aprox. BHN 143/163 Relevado de Esfuerzos Piezas Recocidas: Calentar a 1100-1300°F (595-740°C), mantener 2 horas, dejar enfriar en aire quieto. Piezas Templadas: Calentar a 30-55°C (50-100°F) debajo de la temperatura original de revenido, mantener 2 horas, dejar enfriar en aire quieto. Enderezado: Recomendable hacerlo entre 205-425°C (400-800°F) CEMENTAR – Carburizado En caja o en sales a la profundidad deseada a 880-925°C (1615-1700°F). Enfriamiento en aceite o al ambiente. Revenir inmediatamente. Revenir Durante 1 hora mínimo a 150-260°C (300-500°F). El proceso de cementado se aplica para incrementar el contenido de carbón en la superficie para que a través de un tratamiento térmico adecuado, la superficie cementada se vuelve substancialmente mas dura que el núcleo. El proceso combinado de carburizar y de templar por medio del tratamiento térmico es generalmente conocido como “cementado”. El proceso de tratamiento térmico es seleccionado para cada aplicación en particular, de acuerdo a las propiedades requeridas tanto en la superficie como en el núcleo. Aunque existen muchos tratamientos térmicos para los aceros de cementado, los siguientes tratamientos son algunos de los típicamente usados.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

Cr12MoV steel has high hardenability. The cross section is 300~400mm. It can be completely hardened. It can still maintain good hardness and wear resistance at 300~400℃.

Cr12MoV can be used to make a variety of molds and tools with large cross-sections, complex shapes and withstanding large impact loads. It is characterized by high wear resistance, hardenability, micro-deformation, high thermal stability, and high bending strength. It is second only to high-speed steel. And Cr12MoV is an important material for a die, cold heading. The consumption ranks first among cold-worked die steels.

In fact, the Chinese market is a mixed and confused. Some unreliable suppliers may be in order to earn high profits, completely disregard and did not consider for the customers at all. And deceive customers with the bad quality. These dishonest behaviors not only disrupt the market. At the meanwhile, it has brought a serious impact on themselves, especially on the end user.

The consequences of purchasing these crudely fabricated Cr12MoV cold work tool steel for end-user are:
1) The microstructure of inferior Cr12MoV die steel is severely segregated. Causes poor processing performance, often encountered difficulties in drilling and tapping.
2) The heat treatment has a large amount of deformation, a high risk of cracking and bending occurs from time to time. It cannot guarantee the stability of the mold size, affect the appearance and even die scrap.
3) The scrap steel refurbished Cr12MoV mold steel has a lot of impurities. It causes the mold to have poor red hardness at high temperatures. The mold hardness decreases quickly, and the knife edge is easily worn.
4) The purity of the mold steel is poor, and there are many non-metallic inclusions. It results in poor impact toughness of the mold, and the knife edge is easy to collapse and drop.

Therefore, we OTAI Special Steel hereby call and expect that all the suppliers can treat every customer honestly. Be responsible to our products, to our reputation and to our customers in the end. Quality should be the basis for all our suppliers to survive. This is the only way we all suppliers can fly higher and go further and farther on this steel road!

Ms Phoenix Li

Mobile/WhatsApp: 0086-13925830813

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com

What are the characteristics of H13 die casting molds？Mr Chen asked me today.

I told him,H13 is a very representative hot-making mold steel. It is widely used in die casting molds. The operating temperature below 600 degrees, the comprehensive performance is good,and the heat resistance is strong, and it can be water cooled directly , Heat treatment hardness up to HRC50-54, excellent toughness, suitable for all hot-working die-casting molds, mainly used for 50,000 times molds, aluminum alloy die-casting molds, all of the zinc alloy die casting molds, requiring long service life.wear-resistant plastic molds, All wear-resistant parts that require high-temperature operation.

If you wanna know more about material of die casting molds,please click our link- Die casting molds ,or see information as below,

Related Specifications ASTM A681-1999    H13 Tool Steel data files Down

1. AISI H13 tool steel Chemical composition

2. AISI H13 tool steel Form of Supply

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

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

3. Applications of AISI H13 Tool Steel

H-13 Tool Steel is used in hot forging dies, hot forging die inserts, hot gripper dies, hot nut tools, hot header dies, brass forging and pressing dies, hot forging aluminum base dies, aluminum casting and extrusion dies, zinc die casting dies, extrusion mandrels, plastic molds, cores, die holder blocks, hot press dies, hot work punches, etc.

4. AISI H13 Steel Forging

For forging H13 tool steel, first slowly Preheat to 750°C(1382°F), soak enough time, then rapidly heat to 1050-1100 °C(1922-2030°F). then start forging, ensure the forging temperature higher than 850°C(1562°F).  Cool H13 tool steel must be slowly after H13 steel forging finished.

5. Annealing of Tool Steel H13

Heat to 840-860°C(1544-1580°F), Soak thoroughly before furnace cool at a maximum rate of 20°C(68°F) / hour, Cool down to 600°C (1112°F). Then cool in air.

6. Stress Relieving

Befor make products, The Tool steel stress relieving is very necessary.  When H13 tool steel is ground , heavily machined, cutting,milled , the relief of internal strains is necessary before hardening to minimise the possibility of distortion. for stress relieving, heat the H13 steel component to 700°C(1292°F) carefully, Get  enough soaking period . Then cool in the furnace or cool in air.

7. Hardening

first should preheat the H13 tool steel parts to 780-820°C(1436-1508°F), Soak enough time, ensure soak thoroughly. then rapidly heat to 1000-1030°C(1832-1886°F), soak about 30 mins. cool in air or oil.

8. Tempering

Heat the H13 tool steel parts to tempering temperature, soak enough time until to Soak thoroughly.  The usual tempering temperature range is 400-650°C(752-1202°F), It depend on the tools hardness require and the operating temperature.  H13 tempering data for your reference as below:

9. Nitriding of H13 tool steel

On some special tool require,  the higher hardness is required.  Nitriding the H13 steel can get a hard surface case. after Nitriding , the H13 hot work tool steel will  have a resistant to wear and erosion surface. Typical Nitriding data for your reference as below:

What are the characteristics of H13 die casting molds？Mr Chen asked me today.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

4140 Steel Bar AISI A29 | 1.7225 | 42CrMo4 | SCM440 STEEL

TODAY IS A GOOD DAY !

TODAY IS A SPECIAL DAY FOR OTAI SPEICAL STEEL COMPANY !

4140 Steel Bar AISI A29 | 1.7225 | 42CrMo4 | SCM440 STEEL

For the promotion with that we have stock for it with round bar /plate/block / flat bar with available size in our warehouse in Dongguan city , China .

www.otaisteel.com

AISI 4140 Steel Bar, Steel Plate, Flats Supplier, Stockist and Exporter. AISI SAE 4140 alloy steel 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 AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weldability characteristics.

ASTM alloy 4140 steel 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 4140 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.

Welcome customers to inquiry AISI 4140 steel bar, plate, flat steel for the 4140 steel price. We are professional supplier and exporter for more than 20 years. We offer you worldwide solution for aisi alloy 4140 steel bar.

I am sincerely welcome you to inquiry from us .

I await for your comments in coming soon .

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

OTAI Special Steel keep high level stock for 34CrNiMo6 round bar. We can support our customer regular size Φ10mm to Φ500mm. We support quickly shipping time, 2 hours after-sale response, 2 days earlier than expected, hard for competitors to do this. OTAI Steel have professional quality control system. There is 8 consecutive years no quality event complain, over 80% repeat order rate.

34CrNiMo6 round bar overview

34CrNiMo6 is DIN standard alloy steel, can be used as equivalent for AISI 4340. We supply a lot of this material regularly to South America market. Our customers include steel distributors, and end users like vessel parts and oil equipment parts manufacturers as well.

Peru customer story

We have a Peru customer Mr M, who is market player for special steel in local market, buy OTAI Steel 1045 and 4140 since 5 years before. Mr M concern China quality, so insist buy 34CrNiMo6 round bar from North America for many years, much more expensive of course.

Since 2018, OTAI focus on improving sales revenue for CrNiMo steel, we keep daily stock 500 to 800 tons for 34CrNiMo6 round bar, include small diameter 34CrNiMo6 round bar Φ10mm, also big diameter 34CrNiMo6 round bar Φ500mm, price is also more attractive than before. Mr M show his interesting about what we do, but still do not decide to buy, because his quality concern, again.

This April, OTAI Steel signed contract with Saudi Arabia tender project which use OTAI material 34CrNiMo6 round bar. This project is proceed by one of our Asia customer, ender user is a Saudi Arabia tender project. The project will last 3 years. Our customer win the bid for material 34CrNiMo6 round bar and 1045 round bar. We supply 34CrNiMo6 round bar to them. The first stage they order 9 containers to us, split to 3 batch, 3 containers each batch, each batch they require SGS inspection on site, and inspection standard is EN BS 10343-2009. SGS inspection items as below:

1) Chemical composition: Test method ASTM E415-2017

2) Tensile test: include tensile strength, yeild strength, elongation, reduction of area. Test method EN ISO 6892-1-2016

3) Impact testing: Test method EN ISO 148-1-2016

Result: OTAI 34CrNiMo6 round bar comply with customer required standard EN BS 10343-2009

We have great sincerity to work with Mr M about 34CrNiMo6 round bar, so we keep this Peru customer aware each step and detail of SGS inspection. This October, we completed all three batch 34CrNiMo6 round bar, and shared with Mr M total three different SGS inspection report. This November Mr M sign contract with OTAI Steel. We are really happy to get trust from this customer, who have high quality requirement.

OTAI Promise, we undertakes every order to end and solve customer’s problem without any hesitate on responsibility.

Ms Susie Li

Mobile/WhatsApp: 0086-13826999755

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Susie@otaisteel.com

1.2344 Hot Tool Steel  equivalent with JIS SKD61 , AISI H13 , GB 4Cr5MoSiV1 , AISI H13 consists of  chromium,   molybdenum and vanadium and is known for its high hardenability and great toughness . Otai Special Steel could supplier of 1.2344 Hot Tool Steel  in round bar, plate, flat bar, sheet, square and block , the measure should be regular standard . Special size could be  custom-made .

1.2344 Hot Tool Steel  equivalent with JIS SKD61 , AISI H13 is characterized by:

1.High level of toughness and ductility
2.Good resistance to abrasion at both low and high temperatures
3.Good high-temperature strength
4.High through-hardening properties
5.Very limited distortion during hardening
6.Good resistance to thermal fatigue

My customer from Guatemala did not know this material characteristics very well , from 2011-2013 they only sold 1.2311 plastic die steel , and his client need hot work die steel , to making hardware mould steel , the customer ask for our company to introduce the materials , and after we loading the 1.2344 sample to his client , and finally he always purchase two container , one 1.2311 and one 1.2344 .   And till now they purchase 1.2311 / 1.2344 / D2 / Cr12Mov and all the mould steel materials more and more .

1.2344 Hot Tool Steel is used in hot forging dies, hot forging die inserts, hot gripper dies, hot nut tools, hot header dies, brass forging and pressing dies, hot forging aluminum base dies, aluminum casting and extrusion dies, zinc die casting dies, extrusion mandrels, plastic molds, cores, die holder blocks, hot press dies, hot work punches, etc. AISI H13 can be cut to your required sizes. H13 steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. 1.2344 Hot Tool Steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Ms Monica Yu

Mobile/WhatsApp: 0086-13711903397

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

OTAI Steel professional supply EN24 equivalent 40CrNiMo, which is China standard grade, can be AISI 4340, Din 36CrNiMo4, W-Nr 1.6511 equivalent as well. Generally speaking, they can be equivalent each other if not very special application condition.

Most customer purchase 40CrNiMo as EN24 equivalent, especially customer from British, Middle east, and Africa. We sell large quantity to such district big quantity each year. China standard 40CrNiMo are widely accepted as EN24 equivalent and other grade SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 word wide for reasons as following:

1. Mechanical Performance for 40CrNiMo and EN24 steel are similar
2. Price for 40CrNiMo is much cheaper compared other mentioned grade above
3. 40CrNiMo is the most widely used engineering alloy steel in China, usage is huge, stock is always enough, can support quickly shipment.
4. China standard steel quality is good, and qualified at almost all condition EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 applied.

Below table is chemical composition for EN24 equivalent 40CrNiMo and other mentioned grade.

OTAI Special steel focus on special steel industry above 20 years. Besides alloy steel, our other main group are tool steel, high speed steel and high quality carbon steel. Our professional engineer always provide our customer most suitable technique proposal, which will help customer save cost a lot.

Last week, one customer send us inquiry for EN24, they are large steel holders in Middle East. He send us the dimensions from diameter 20mm to 200mm, length 6 meters. All are regular size. They need heat treatment Q+T. We provide production lead time 40 days consider Q+T process. They have no problem about the lead time, but EN24 price is not competitive. Then our engineer commend them take EN24 equivalent 40CrNiMo instead. After check chemical composition, mechanical property of EN24 equivalent 40CrNiMo, customer take our proposal, and decide to go ahead EN24 equivalent 40CrNiMo soon. That’s great. Not only save cost for our customer, also this will become the first order from this Middle East country. EN24 equivalent 40CrNiMo will help customer expand their business in local market for sure. Looking forward good cooperation in future.

If you are purchasing material EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511, you can contact us for a trail. It is good option for you to consider China standard 40CrNiMo. You are welcome contact us for other product as well.

Ms Susie Li

Mobile/WhatsApp: 0086-13826999755

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Susie@otaisteel.com

In Germany it is name 1.2379 steel , in China it is named Cr12MoV, in America it is D2. It is named in SKD11 in Japan. Quenching temperature is about 1025 degrees Celsius, generally high temperature tempering to HRC56-62 is recommended.

Our customer purchased 1.2379 steel from another supplier before. He met the cracked quality problems when his end buyer used. So he was planning to find a new supplier to check the quality and ask for the main reason cause. Finally he found us OTAI Special Steel by google search.

In theory, 1.2379 steel is a universal metal stamping die steel. It can achieve high hardness after heat treatment. It has a certain abrasion resistance and has small heat treatment deformation. It is mainly used for all single punch dies, continuous punching dies for thin materials. It also could be for punching die templates with a punching speed of less than 200 times. The essence of 1.2379 steel is high-carbon high-chromium cold-working die steel. The advantage of high-carbon steel is that it can easily reach high hardness after heat treatment and has good wear resistance. The disadvantage is that it is easy to form carbide aggregation. It is resulting in extremely high local hardness. And the uneven toughness of 1.2379 steel is naturally poor. Therefore during use, it is often found to be easily cracked.

Many people think that steel material is a standard product, and it is right to choose a cheap price one for the steel grade. But during using it, and found the mold is not wear-resistant. And it is easily crushed and the knife edge is easy to round. Sometimes the knife edge is easy to crack.
With the open and sincere attitudes, we disclosed here there are 4 levels quality difference in the market:
1. Non-standard 1.2379 steel, alloy composition is not matched the standard.
2. 1.2379 steel after scrap steel refurbished. It is with high content of non-metallic inclusions.
3. The common national standard 1.2379 steel which made by the electric furnace steelmaking.
4. High-quality 1.2379 steel, using outdoor refining and vacuum degassing. It is with high purity and uniform structure.

Therefore, we suggest to customers do not rely on price to choose the supplier, we must understand the historical background of the supplier and quality reputation.Our OTAI is stable and reliable supplier for Fortune 500 companies at domestic and abroad, such as Thyssenkrupp, China North Industries Group Corporation Limited. We exports various tool steel and alloy steel to more than 30 countries from Europe and America, Middle East and Asia. Our steel materials meet DIN / ASTM / EN / JIS etc different international standards.

Ms Phoenix Li

Mobile/WhatsApp: 0086-13925830813

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Phoenix@otaisteel.com