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

Which material is common use for metals extrusions

DC53 is common use for metals extrusions

The owner of a metals extrusions factory tell me some experience, the factory is specialized in stainless steel 304 hinge,the thickness is from 2.0 to 3.0mm. He gave me 2 important information. For stamping 304 stainless steel with a thickness of 2.0-2.5, DC53 steel can be used for about 400,000 times. The metals extrusions material will start to burst. In the second case, the stamping thickness is about 3.0 and  If the punch of 304 stainless steel is used properly, it will start to burst after punching 70,000 to 80,000 times. From here, you can know that DC53 is common use for metals extrusions，and it’s very practical for metal stamping.But do remember the key is to do a good job in heat treatment.

If  you want to know more about it,Please click the link of check as below:

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

D2 Tool Steel- Chapter 2

D2 Tool Steel-chapter 2

To make a good working knife, you need a good piece of steel.

Besides being a talented writer, the late Butch Winter was also an enthusiastic hunter, with what was once the largest privately owned collection of custom knives in America. When Butch wrote a published article stating he didn’t care much for D2 tool steel because knives made with it tended to either be too hard or too soft, it made an impression.

Integral drop-point hunter with cast D2 steel blade and cocobolo handles by Robert Fisher. Knife style is scapel-inspired.

In the years preceding his death, Butch found knives like Bob Dozier’s, which were made with D2 steel, to be to his liking. Dozier’s D2-bladed knives have set a performance standard for years. You can buy fancier D2 knives or less-expensive D2 knives. But, when you want a knife that can cut as well as any made with D2 alloy, Dozier Knives continues to be the comparison standard.

Butch Winter sagely stated there are no bad cutlery steels, although some might be better-suited for certain applications than others. My personal experience with knives made with D2-steel blades has been that the steel is capable of providing a performance range that stretches from good (in the top 50%) to phenomenal (in the top 1%).

How does a buyer determine where the knife is on that scale? It’s a valid question, but one for which I don’t have the definitive answer. I do have a better-than-average comprehensive explanation for why that definitive answer is elusive.

D2 STEEL MAKEUP

The chemical content for D2 tool steel is 1.4-1.6% carbon, 0.60% manganese, 11.00-13.00% chromium, 0.30% nickel, 1.10% vanadium, and 0.70-1.20% molybdenum. The primary use of this steel is for making stamping dies that cut steel pieces out of other, softer steels. The actual percentage of D2 tool steel produced by steel makers that winds up in use as knife blades is quite small.

While I have no evidence that distribution of available product might prejudice how steel makers provide the D2 steel they make, as a chemist, I can tell you that all D2 steel is not identical. Every production lot has allowable fluctuations in the component contents. This means that it’s possible for the variables to stack in a way that may either result in an ordinary serviceable knife or in an extraordinarily good knife. And the result may not be evident until after a knife is finished.

Bob Dozier told me during a telephone conversation that, once in a blue moon, he has to send a shipment of D2 steel back to the steel supplier after heat treatment of the first blades when, after testing, they did not give the results he expects from his proprietary heat-treatment procedures.

Not all knifemakers are as conscientious or demanding about quality control in their heat-treating as Bob Dozier. Every time we talk, he stresses that it’s consistency and uniformity of heat treatment that’s the primary factor in his knives performing in a superior way, knife after knife. Bob confirms that to make a good working knife, you need a good piece of steel.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com

1.3343 High Speed Steel  is tungsten-molybdenum high-speed steel with a well-balanced carbon composition and high toughness . It is also called JIS SKH51 and M2 steel. It is easy to overheat, control the quenching heating temperature is necessary and the heat treatment protection requirements are strict. It is used widely to make cutting tools because of its great hardness and wear resistance.

1.3343 High Speed Steel  is used high production machine work and is used for various cutting tool, knife and punch and die applications. Some of these applications include Twist drills, taps, milling cutters, reamers, broaches, saws, and knives.

Otai Special Steel can supply the M2 Steel  round bar,  flat, plate and square block. M2 round bar can be sawn to your required lengths as one offs or multiple cut pieces. M2 high speed tool steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. 1.3343 High Speed Steel  Ground  bar can be supplied, providing a quality precision finished bar to tight tolerances.

1.3343 High Speed Steel first story . My customer from Bulgaria purchase 1.3343 High Speed Steel from our company every year , for the flat bar small measure and round bar in mixed size , if we have no best quality , the customer did not trust us so much .

1.3343 High Speed Steel second story . And my customer from Malaysia only need  1.3343 High Speed Steel round bar in one size and quantities only 500KGS , the materials they need very harshly , we use air freights to send the materials to them in 7 days after received the payment , and the customer was so surprised for the delivery . They thanks us so much , we have solved all his troubles and help them win the trust of the terminal .

The story about 1.3343 High Speed Steel is still going on, and Otai Special Steel is always waiting for you here .

Ms Monica Yu

Mobile/WhatsApp: 0086-13711903397

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Monica@otaisteel.com

It is an indisputable fact that there are many H13 tool steel suppliers in China

H13 tool steel suppliers

It is an indisputable fact that there are many H13 tool steel suppliers in China,but I have to admit that there are also full of fake h13 tool steel suppliers , so,it have to be more careful when purchasing it,especially aluminum alloy die-casting enterprises. When purchasing mold steel, they are constantly being deceived and the lost money has exceeded the cost of it. The h13 tool steel suppliers selling price, through statistical discovery, H13 mold steel has 7 levels at least , which are non-standard H13,refurbishment steel national standard “H13”, refurbishment steel H13 national standard “H13” ESR, international electric furnace H13 and national standard ESR H13.etc, I hope that when you purchase mold steel, especially aluminum alloy die-casting mold companies, you must be careful not to be fooled by the low prices. The result is irreparable losses.

If you wanna know more about H13 tool steel suppliers,pleaes click the link or see detail as below.

AISI H13 tool steel 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

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.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

D2 Tool Steel

D2 Tool Steel

D2 Tool Steel

D2 Tool Steel is a versatile high-carbon, high-chromium, air-hardening tool steel that is characterized by a relatively high attainable hardness and numerous, large, chromium-rich alloy carbides in the microstructure. These carbides provide good resistance to wear from sliding contact with other metals and abrasive materials. Although other steels with improved toughness or improved wear resistance are available, D2 provides an effective combination of wear resistance and toughness, tool performance, price, and a wide variety of product forms.

APPLICATIONS: Rolls, punches, dies for blanking, forming, trimming, and thread rolling, shear knives, food-processing knives, and gauges.

To make a good working knife, you need a good piece of steel.

Besides being a talented writer, the late Butch Winter was also an enthusiastic hunter, with what was once the largest privately owned collection of custom knives in America. When Butch wrote a published article stating he didn’t care much for D2 tool steel because knives made with it tended to either be too hard or too soft, it made an impression.

In the years preceding his death, Butch found knives like Bob Dozier’s, which were made with D2 steel, to be to his liking. Dozier’s D2-bladed knives have set a performance standard for years. You can buy fancier D2 knives or less-expensive D2 knives. But, when you want a knife that can cut as well as any made with D2 alloy, Dozier Knives continues to be the comparison standard.

Butch Winter sagely stated there are no bad cutlery steels, although some might be better-suited for certain applications than others. My personal experience with knives made with D2-steel blades has been that the steel is capable of providing a performance range that stretches from good (in the top 50%) to phenomenal (in the top 1%).

How does a buyer determine where the knife is on that scale? It’s a valid question, but one for which I don’t have the definitive answer. I do have a better-than-average comprehensive explanation for why that definitive answer is elusive.

D2 STEEL MAKEUP

The chemical content for D2 tool steel is 1.4-1.6% carbon, 0.60% manganese, 11.00-13.00% chromium, 0.30% nickel, 1.10% vanadium, and 0.70-1.20% molybdenum. The primary use of this steel is for making stamping dies that cut steel pieces out of other, softer steels. The actual percentage of D2 tool steel produced by steel makers that winds up in use as knife blades is quite small.

While I have no evidence that distribution of available product might prejudice how steel makers provide the D2 steel they make, as a chemist, I can tell you that all D2 steel is not identical. Every production lot has allowable fluctuations in the component contents. This means that it’s possible for the variables to stack in a way that may either result in an ordinary serviceable knife or in an extraordinarily good knife. And the result may not be evident until after a knife is finished.

Bob Dozier told me during a telephone conversation that, once in a blue moon, he has to send a shipment of D2 steel back to the steel supplier after heat treatment of the first blades when, after testing, they did not give the results he expects from his proprietary heat-treatment procedures.

Not all knifemakers are as conscientious or demanding about quality control in their heat-treating as Bob Dozier. Every time we talk, he stresses that it’s consistency and uniformity of heat treatment that’s the primary factor in his knives performing in a superior way, knife after knife. Bob confirms that to make a good working knife, you need a good piece of steel.

DON’T JUDGE D2 STEEL BY ITS LOOKS

You can’t tell how a knife cuts just by looking at it — you have to cut something with it. I perform cutting tests in materials that have proven to be hard to cut for all but the very best knives. I also do side-by-side cutting comparisons while doing daily cutting chores to distinguish which knives cut with the fewest limitations.

For instance, the D2 knives that made the fewest cuts on rope using only 1-inch of blade, and comparable edge geometry, still accomplished enough slices to be on the high end of “good” by my evaluation criterion. The longest-cutting knives will cut 10 times longer between sharpening, than the knives with the least cutting endurance.

I can take the two very best D2-bladed rope cutters I’ve tested and compare them by cutting the neck off a plastic bottle. One blade can accomplish this with a single slice; the other blade requires 15 slices. In this case, the different heat-treatments achieve different carbide grain sizes, and the larger carbide grain apparently cuts this plastic better than the nano-grain carbide, which is 10 times smaller.

SO, WHAT KIND OF KNIFE DOES D2 STEEL MAKE?

It varies from good to extraordinary, depending on the production lot of steel, the way the steel is heat-treated, and the way the blade edge is beveled and finished. The knife owner can control the last two variables, but the others are established invisibly before the knife is purchased.

The only way to know how good your knife is, is to test it with repeatable cutting tests. It’s like accuracy-testing a firearm. Experience may indicate that a certain type of gun usually performs well. However, the way it performs can depend on the ammo used, and preferences will vary from individual gun to individual gun.

WhatsApp: +86-769-23190193

Tel: +86-769-23190193

Fax: +86-769-88705839

Email: Jack@otaisteel.com