Category Archives: Blog

42crmo4  pre-hard round bar, Otai is a reliable supplier.

Otai special steel company sells alloy steel, tool steel, carbon steel. We export special steel worldwide. Our main product is 42crmo4 steel. 42crmo4  pre-hard round bar is also included. We are finding serious steel importers and distributors. I hope we can cooperate with each other, and benefit each other.

We have sincerely customers abroad. We strive to improve the service and provide a high-quality product. Today I would like to share a story about after-sell service, with you.

We have a customer in Egypt, he bought the 42crmo4 pre- hard round bar from our company. his company serves for the local government. It is used as a basic gyp construction. Our customer bought Two cabinets 42crmo4 from our company. after he purchased the order, we Booked the Ship Cabinet. However, when our customer received the product, he was unhappy, because it is hard to pull out the steel. We didn’t add the wood in the cabinet, so the cabinet is damaged by the steel. as our clients didn’t tell us special requirements about loading, we ship it as normal. I apologized to our customer. I negotiate with him and promise we will add two pieces of wood in the cabinet from next time. he is glad to hear that. Otai company is responsible for ever order.

42crmo4 steel series we can provide:

42crmo4 pre-hard round bar 12-120mm; can open as your specifications;

42CrMo4 hot-rolled plate 12-185mm can be cut into your specifications, smooth plate finishing.

42CrMo4 / 4140 forging bar 300-500.We guarantee the uniform in hardness.

Otai promises to be responsible for every single shipment to the end, without tangling responsibilities and solving customer problems as soon as possible.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Today i want to told you a story about 4140 Round Bar Cold Drawn Q+T . First all , please let me introduce myself . This is Monica Yu from Dongguan Otai Special Steel from China .  And we have specialized in export special steel to all over the world . We have more than 15 years work experience in this industry .  We have the most adequate inventory for 4140 more than 500 Tons .  Any shape like sheet plate , round bar , flat bar , square bar , seamless pipe we could provide . Any size from 20-120mm have most stocklist , and other 120-250 have better stocklist , some very big size 260-500mm also could place order . The fast delivery for original plate and bar could within 15 days .

I have received a new inquiry about 4140 Round Bar Cold Drawn Q+T . This new inquiry come from Malaysia . In this week after come back from May Day holiday . Most country have resume to work after Coronavirus . In this inquiry , the customer request for 4140 round bar bright surface and size diameter 14 / 16 mm  , Q+T .

The most normal situation for 4140 round bar was hot rolled , black surface from Dia. 16-120mm . The size below 16mm should be 4140 round bar cold drawn Q+T production process . Diameter could to be choose like : 16 , 14 , 12 , 10 , 8 , 6MM . The customer did not accept the black surface situation , so we suggest them to take the cold drawn production . And i send the before loading cold drawn production picture to the customer  to confirm the correct situation . After all , the customer confirm the items was really what he wanted . And we all solved our problems .

After confirmed the correct situation for production , we could discuss with each other about the best price . Only know clearly about customer’s requirement . We could give the best lowest price and promotion of the order transactions . And in the three days , the customer send us purchase order with 4140 round bar cold drawn Q+T one 1*20’GP container . And we will loading the container to them with in 15 days for all clearly . If we want to confirm details after we get the purchase order . We may lost many time on this , and could not make fast delivery .

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

4140 steel plate in OTAI

OTAI boss Jack Tan focus on 4140 as key steel grade since the year 2017, because very reliable supplier with very competitive price. At first OTAI kept 200 tons daily, then 500 tons daily at 2018. At the end of 2019, daily stock increased to 800 tons. Today, the stock usually keep 800 to 1000 tons. That means, all regular size you can buy from us at any time with very quickly shipping time.

4140 steel plate dimension, delivery condition, maching service and lead time

Dimension: Thickness 12mm to 200mm; width: 2000-2300mm; length 3000-5800mm

Delivery condition (as below):

4140 hot rolled plate: Lead time 5-10 days

4140 Q+T (quenched and tempered) plate: 20-30 days

4140 annealed plate: 20-30 days

Machine service: We provide milling and cutting service for steel plate. We can cut to the size per customer’s need, and milling tolerance per customer’s need as well. Production lead time need check separately per different requirements.

4140 steel plate main market

OTAI export 4140 steel plate to all over the world, some are export from trading company in China. OTAI 4140 steel plate customers are from the countries and district as following: Middle East, Southeast Asia, Turkey, Egypt, Australia, Latin America, South Africa, Italy, and Belgium. With effort of OTAI marketing team, we have confidence more and more countries will use our 4140 steel plate.

OTAI 4140 steel plate for sale now, this is really good purchasing time. Send me your size, quantity, specification requirement, price term, we will provide you our most competitive promotional price. Looking forward become your business partner.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Many types of steel are used as tool steel, so is the p20 pre-hardened steel. Otai special steel company devotes to provide p20 steel for customers.

Many types of steel are used as tool steel, so is the p20 pre-hardened steel. Have you ever used it? I would like to share something about the p20 tool steel with you. Otai special steel company devotes to provide different tool steel for our customers. p20 steel is a presentation.

Commonly speaking, Otai provides p20 pre-hardened steel, both the round bar and the plate steel are supported. the popular size of the p20 steel we sold is diameter 300mm-500mm. Moreover, it has a Uniform hardness.

Application of p20 pre-hardened steel

P20 steel is Main be applied to in zinc, aluminum, magnesium, and its alloy die-casting mold; Hot-pressing mold, all kinds of a hot forging die; Metal extrusion dies, die set.

We have a customer from Bangladesh send me an email, his company belongs to heavy industry and construction industry.he wants to buy the p20 as mold from our company.the size is 655X625X185MM, 655X125X185MM, 605X600X175MM, 605X110X175MM,he needs to buy two pics each sizes. However, we don’t have a suitable size in storage, and the quantity is little. We communicate with our customers whether the size can be changed or the amount can be added a little more. Our customer denied. So we missed the order.

Generally speaking, we can sell the p20 with MOQ 2 tons if we have storage in the factory, if not, we have a requirement on the quantity.

P20 Mould Steel is German Die steel, the steel by “super clean” production process, pre-hardened, showing the height of micro pure and excellent homogeneous structure, excellent polishing, and light etching engraving. After heat treatment, processing and polishing performance are good, can be carried out, and can be processed, suitable for the surface treatment of chrome, material hardness even (to 400mm thick), good toughness, good mechanical processing performance. The gold microstructure is martensite and bainite structure.

More details, please contact me as soon as possible.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

How to Define a Good 4140 Plate Supplier ? 

First, the supplier should be experienced about the 4140 steel grades as per standard of ASTM A29 standard. The chemical composition and other property should be as per standard. This is the basic.

Second, if the supplier keeps 4140 steel plate stock with complete 4140 plate sizes / thickness or not. For example, 4140 sheet, 1.5mm thickness, 5 tons,  12mm, 6tons, 20mm, 5 tons… Then when anytime, customer need different4140 steel sizes with fast delivery, the supplier could process the order in very short time and delivery. Besides, when customer needs 4140 flat bar with different sizes, the supplier should be equipped with band saw to cut to width according to given spec and quantity. Like Otai, there is around 1000 tons stock of 4140 steel plate for customer’s choose.

Third, if the 4140 plate supplier is also able to supply material with different heat treatment condition and hardness, it would be good. Usually, it is usually supplied as 4140 hot rolled condition. Most of stock materials are hot rolled 4140 plate / flat bar. But some customer also need 4140 annealed plate, or Q+T plate with higher hardness. So, if the supplier could supply all different 4140 plate steel. It would be good for customer.

Fourth, if the price of 4140 plate material would be also good. It would be perfect. Or there would be regular 4140 steel plate for sale, it would be much attractive.

What You Should Care for 4140 Steel Material ?

Because it’s very common for 4140 round bar, but it’s not that popular for 4140 steel plate or 4140 flat bar. So, it’s not that easy to find a reliable 4140 steel plate supplier. But when you find it, you should care about something:

Hardness: Hardness of different condition of 4140 plate. Generally, the 4140 annealed plate hardness is max 255HB, while the quenched and tempered (Q&T) plate 28-32HRC (280-320HB). So, when you have requirement of hardness, you should make it clear to supplier, to avoid the wrong material condition.

Properties: When you have special mechanical properties, you would need heat treated plate for sure.

Equivalent: There are 4140 steel plate equivalent steel grades, that is, 42CrMo4 / 1.7225 plate or SCM440 plate. You would need to specify 4140 grade if you don’t accept equivalent. You could see the difference in this post 4140 | 42CrMo4 | SCM440.

Otai is the reliable supplier, also 4140 plate supplier for Uddeholm. Reliable supplier with complete range of sizes and ability for heat treatment and cutting to size. Welcome for steel 4140 plate request anytime.

Mr. Jeremy H.

Mobile/WhatsApp: 0086-13610149979

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jeremy@otaisteel.com

There are many 4140 steel plate suppliers in China. However, Otai has 21 years’ experience in the steel business, we got a very good reputation from our customers

4140 steel plate supplier

There are many 4140 plate suppliers in China. However, Otai has 21years’ experience in the steel business, no matter in domestic or overseas, we got a very good reputation from our customers. Our warehouse always keeps the daily stock for the 4140 steel plates in 1000Tons each day, so we are the largest stockist in the south of China. many customers make repeat orders to buy 4140 steel and other steel grades from us very often. Some new customers may have some concerns about the quality when they placed the first buying. So it really is very important to find a reliable 4140 steel plate supplier.

This week, one of our customers from German wants to buy the Steel bar 42CrMo4 Size ∅6, ∅5, ∅ 8 h8 from our company. Our customer is selling and repairing APUs and components .he wants to buy our 4140 as the Components. However, the sizes he needs is too small, we can’t provide it for him. So he sends me another email about the other type of steel. We communicate with each other, I hope I will hear good news from him.

Recently, Otai also has 4140 coil steel in storage, the thickness is between 3mm to 10mm. We also provide the 4140 round steel and 4140 plate steel for our customers.4140 will be our super-star product in 2020, the quality of it is assured, we keep good post-service for our customers. We sold our 4140 products to many foreign countries such as Brazil, Italy, Australia, and so on. No matter our end-users or Stockists keep a good relationship with us. Normally speaking, they repeat the order every several months.

If you are finding the 4140 steel plate supplier, and have no idea to choose the reliable one, I suggest you choose us.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

42crmo4 plate steel-children’s mask mold material, Otai has already prepared.

42crmo4 plate steel-children’s mask mold material, Otai has already prepared.

There is good news today, students are ready for going back to school. Because of the pandemic, everyone’s life turns to a mess, our daily life is totally damaged .students have to study online, we have to work at home. However, the government release the good news for us .students will gradually resume going back to school. Maybe China is the first country to take this kind of measure.

I am sorry to know that the pandemic is still serious. I hope the pandemic will pass soon, everyone’s life turns to normal. Although the risk exists, if we prepared well, it will be safe. One of the reminders is children have to wear the mask every day.

When students go back school, they have to wear the mask, and change one every four hours .to satisfy to demand of children mask, We provide different size of mask mold. 42crmo4 plate steel is a suitable material for making the mask mold.

In the past 3 months of 2020, we sold a lot of 42crmo4 steel. During that period, the majority of our customers are mask manufacturers. We have rich experience in mask mold making. In the past 3 months, our colleagues work day and night to produce the mask mold.

AISI 4140  steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.

4140 alloy steel material is a high-quality Quenched and Tempered Alloy Structural steel. It belongs to the high-quality medium carbon alloy steel, Oil Quenched & Tempered Hardness is 28-34 HRC.4140 Annealing delivery hardness less than 250HB.

Because of the properties of 4140, it is suitable for making the mask mold. Anything any details , you are welcome to contact me.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

OTAI Special steel supply the steel plates, steel sheet, round bar, flat bars and steel coil for the Alloy steel, tool steel and carbon steel.

OTAI have the large stock available for the 42CrMo4, AISI 4140 and 1.7225 steel coil, and the thickness is ranged in 3~10mm, and the width size in 1260~1500mm. We exports various tool steel and alloy to more than 35 countries from Europe and America, Middle East and Asia. Our steel coil materials meet DIN / ASTM / EN / JIS etc different international standards.

Recently, when I talked with my one customer, he said he notice that the increase of new cases in China is Minimum. Did China find a special medicine for fighting the virus?Here I would like to share the facts as below. I think it is important to help people understand exactly why the case mortality number and the absolute death toll number in China has been so low.

For 76 days, the Wuhan city was under strick lockdown. Not the kind of lockdown where if you choose to stay in place, you stay in shelter you can. If you want to go out, you could also try to do that. No, for the great majority of the lockdown, people had to stay at home. Think about what happened in the United States, some people still have to go to work. Some people are against sheltering in place. Some people wear masks, others don’t. In Wuhan, it almost becomes an instinct to wear mask. If you go out without wearing mask, you feel strange. It is that kind of awareness to help yourself to help others. That really helps cut the path of the contagiousness of the virus. In a matter of a week or two, over 40,000 medics came all over China to Wuhan.

In China, we never had the discussion of herd immunity. We never had the discussion between keeping the economy going or saving lives. From the beginning, it was very clear that every life mattered. In Wuhan, over 3600 people aged over 80 survived. Among them, 7 people aged over 100 survived. I think that is probably a record for anywhere in this world.
And everything for the treatment fee is for free for Chinese infected people as government and country will pay for it.

And then of course, there is a role of traditional Chinese medicine. In some of the temporary hospitals where only people with mild symptoms were being treated. They were only given traditional Chinese medicine. This is an advantage that China enjoys.
Is something again probably won’t be understood so easily by people in the west or in America or in Europe. It is the kind of trust between the authorities and the local residents. They trusted in the measures that they were told to follow. And the measures worked.

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com

Otai provides a different form of steel such as a round bar, flat bar, sheet, pipe. Coil steel is also available.

As you know,42crmo4 steel is the main product of our company. To build the brand product of 42crmo4 steel, we provide a different form of steel such as a round bar, flat bar, sheet, pipe. Coil steel is also available.

We don’t sell the 42crmo4 coil steel before. To cater to the requirement of our customers, we have 42crmo4 coil steel in storage now. the thickness is between 3mm to 10mm, the width is between 1260mm to 1500mm. It seldom sells at our local market.

It is also used in the processing of equipment accessories, just like the gasket of all machine tables, it is also applied in the surface of our home equipment such as the washing machine and the smoking machine, gas stove.

Typical applications for 4140 thick plate 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.

Under the pandemic, Otai company still provide the N95 mask mold material-42crmo4 plate, we have different specification. Anyone who is interested in our key product 4140, you are welcome to contact me.

Mr Jack Tan

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: jack@otaisteel.com