Product Description

AISI 4140 Hot Rolled Alloy Round Steel 

Product Description

Size	Dia 10mm~800mm
Technique	Hot Rolled
Process	EAF+LF+VD+ Forged/Hot rolled + Heat Treatment (Annealed,A Normalized, Q+T)
Heat treatment	Normalized ; Annealed ; Quenched ; tempered
Surface Condition	Black surface ; Grinded ; Machined;Turned
Inspection	100% Ultrasonic according to the test standards:SEP1921-84,CLASS C/c or D/d
Payment Terms	T/T;L/C
Trade Terms	FOB;CIF,CFR
Packing	Standard seaworthy packing or as customer required
Application	Typical applications for are forging dies, forging die inserts, hot gripper dies, hot nut tools, hot header dies, brass forging and pressing dies, 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 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.

SUPPLY RANGE OF AISI ALLOY 4140 STEEL BAR

-Dimension: Diameter4-1600mm, length below 16m

-Delivery Conditions

       Cold drawn 4-100mm

       Hot rolled 12-320mm

       Hot forged 130-1600mm

       Peeled: 30-160mm

       Grind: 4-600mm

Turned: 130-1200mm

-Surface: Black, smooth, turned, peeled, grind, polished, oiled and painted surface or other anti-corrosive treatment per customers’ requests

-End: Beveled, plain end, vanished or plastic caps can be provided if necessary

APPLICATION OF AISI ALLOY ROUND 4140 STEEL BAR

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, Xihu (West Lake) Dis. 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.

Item	C	Si	Mn	P	S	Cr	Ni	Mo	Cu
4140	0.38-0.45	0.17-0.37	0.50-0.80	≤0.035	≤0.035	0.9-1.20	≤0.30	0.15-0.25	≤0.30

Item	Tensile Strength	Yield Strength	Elongation	Reduction of Area	Akv	Hardness after Hardened(HB)
4140	≥1080MPa	≥930MPa	≥12%	≥45%	≥63 J	≤217

MECHANICAL PROPERTIES OF AISI ALLOY 4140 STEEL BAR

Properties	Metric	Imperial
Tensile strength	655 MPa	95000 psi
Yield strength	415 MPa	65710 psi
Bulk modulus (typical for steel)	140 GPa	20300 ksi
Shear modulus (typical for steel)	80 GPa	11600 ksi
Elastic modulus	190-210 GPa	27557-3 0571 ksi
Poisson’s ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	25.70%	25.70%
Hardness, Brinell	197	197
Hardness, Knoop (converted from Brinell hardness)	219	219
Hardness, Rockwell B (converted from Brinell hardness)	92	92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)	13	13
Hardness, CZPT (converted from Brinell hardness)	207	207
Machinability (based on AISI 1212 as 100 machinability)	65	65

Detailed Photos

 

Packaging & Shipping

20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
20feet container load 25tons coils whose length is under 5.8m
40feet container load 25tons coils whose length is under 11.8m

Delivery Details : Use trays to facilitate loading and unloading
Standard Export Seaworthy Package.Suit for all kinds of transport,or as required

Company Profile

Based on “Honesty Always be rewarded. ” to do steel export business. Our company already has done steel exports business for 10 years. Specializing in steel plate, steel bar, steel tubes, steel plate cutting parts, and steel deep processing service. With our competitive price and best service, we are committed to your one-stop service of steel material. Our clients are all over the world, USA, Canada, Brazil, Mexico, Venezuela, Australia, Greece, Middle East, Southeast Asia, and Africa.

In 2016, ZheJiang Steel Guang International Trade Co., Ltd is separated from the export department of ZheJiang Rongshenghui Trading Co.,Ltd. After long-term efforts, now we have a steel plate cutting factory, with 18 CNC cutting machines and 3 punching machines, and a heat treatment factory with 3 electric heat furnaces. Set up 2 offices in HangZhou City and HangZhou City. The company has developed into an integrated trader and manufacturer with the ability to export, import, process, logistics and distribution. The advanced management brings high quality to automobile and wins good reputation from market and clients.

Workshop

 

Our Service

Pre-sale Service:
1.Good quality + Factory price + Quick response + Reliable service
2.100% responsible for the quality:all the products are produced by our professional workman and we have a high-work-effect foreigh trade team.
3.We have enough stock and can deliver in short time.
4.Customized designs,colors,sizes and logos are welcome,responsiveness to customers’ requirements.

After-sale Service:
1.We will count cheapest shipping cost and make invoice to you at once.
2.On time delivery.
3.Provide real pictures of loading container,email you the tracking NO. and help to CZPT the products until the goods arrive you.
4.24 hours online service,if any question,please contact us at anytime in your convenience.

Why Choose Us

1. More than 10 years Professional steel export service. Have own production line.
2. Advanced CNC machine.
3. Low cost&Quick Delivery&High quality.
4. Integrity, strength and quality of products recognized by the industry.
5. Most of our clients are international, the domestic well-known enterprises.
6. Has a complete scientific quality management system. 
7. Can meet any requirements for all kinds of sheet metal processing with advanced equipment.

FAQ

 
Q1: How can I get a sample to check your metal work quality?
Answer: After price confirmation, you can require for samples to check our quality. We will provide you sample for free (value under USD35), as long as you afford the express freight.

Q2: How long can I expect to get the metal work sample?
Answer: After you pay the sample charges(if there is) and send us confirmed drawings, the sample will be ready for delivery in 5-7 working days. The samples will be sent to you via DHL, FedEx,UPS,TNT or EMS. It should arrive in 3-5 workdays. You can use your own express account or prepay us if you don’t have any account.

Q3: What about the leading time for metal work mass production?
Answer: Honestly, it depends on the order quantity. Normally, 15 workdays to 30 workdays after your deposit if no the samples are confirmed.

Q4: What will we do if the metal work quality is not ok ?
Answer: If the quality problem is caused by our mistake, we will make replacement order for free or pay the back product charge and handling charge back to you.

More questions, please send the email to us

What Are the Advantages of a Splined Shaft?

If you are looking for the right splined shaft for your machine, you should know a few important things. First, what type of material should be used? Stainless steel is usually the most appropriate choice, because of its ability to offer low noise and fatigue failure. Secondly, it can be machined using a slotting or shaping machine. Lastly, it will ensure smooth motion. So, what are the advantages of a splined shaft?
Stainless steel is the best material for splined shafts

When choosing a splined shaft, you should consider its hardness, quality, and finish. Stainless steel has superior corrosion and wear resistance. Carbon steel is another good material for splined shafts. Carbon steel has a shallow carbon content (about 1.7%), which makes it more malleable and helps ensure smooth motion. But if you’re not willing to spend the money on stainless steel, consider other options.
There are 2 main types of splines: parallel splines and crowned splines. Involute splines have parallel grooves and allow linear and rotary motion. Helical splines have involute teeth and are oriented at an angle. This type allows for many teeth on the shaft and minimizes the stress concentration in the stationary joint.
Large evenly spaced splines are widely used in hydraulic systems, drivetrains, and machine tools. They are typically made from carbon steel (CR10) and stainless steel (AISI 304). This material is durable and meets the requirements of ISO 14-B, formerly DIN 5463-B. Splined shafts are typically made of stainless steel or C45 steel, though there are many other materials available.
Stainless steel is the best material for a splined shaft. This metal is also incredibly affordable. In most cases, stainless steel is the best choice for these shafts because it offers the best corrosion resistance. There are many different types of splined shafts, and each 1 is suited for a particular application. There are also many different types of stainless steel, so choose stainless steel if you want the best quality.
For those looking for high-quality splined shafts, CZPT Spline Shafts offer many benefits. They can reduce costs, improve positional accuracy, and reduce friction. With the CZPT TFE coating, splined shafts can reduce energy and heat buildup, and extend the life of your products. And, they’re easy to install – all you need to do is install them.

They provide low noise, low wear and fatigue failure

The splines in a splined shaft are composed of 2 main parts: the spline root fillet and the spline relief. The spline root fillet is the most critical part, because fatigue failure starts there and propagates to the relief. The spline relief is more susceptible to fatigue failure because of its involute tooth shape, which offers a lower stress to the shaft and has a smaller area of contact.
The fatigue life of splined shafts is determined by measuring the S-N curve. This is also known as the Wohler curve, and it is the relationship between stress amplitude and number of cycles. It depends on the material, geometry and way of loading. It can be obtained from a physical test on a uniform material specimen under a constant amplitude load. Approximations for low-alloy steel parts can be made using a lower-alloy steel material.
Splined shafts provide low noise, minimal wear and fatigue failure. However, some mechanical transmission elements need to be removed from the shaft during assembly and manufacturing processes. The shafts must still be capable of relative axial movement for functional purposes. As such, good spline joints are essential to high-quality torque transmission, minimal backlash, and low noise. The major failure modes of spline shafts include fretting corrosion, tooth breakage, and fatigue failure.
The outer disc carrier spline is susceptible to tensile stress and fatigue failure. High customer demands for low noise and low wear and fatigue failure makes splined shafts an excellent choice. A fractured spline gear coupling was received for analysis. It was installed near the top of a filter shaft and inserted into the gearbox motor. The service history was unknown. The fractured spline gear coupling had longitudinally cracked and arrested at the termination of the spline gear teeth. The spline gear teeth also exhibited wear and deformation.
A new spline coupling method detects fault propagation in hollow cylindrical splined shafts. A spline coupling is fabricated using an AE method with the spline section unrolled into a metal plate of the same thickness as the cylinder wall. In addition, the spline coupling is misaligned, which puts significant concentration on the spline teeth. This further accelerates the rate of fretting fatigue and wear.
A spline joint should be lubricated after 25 hours of operation. Frequent lubrication can increase maintenance costs and cause downtime. Moreover, the lubricant may retain abrasive particles at the interfaces. In some cases, lubricants can even cause misalignment, leading to premature failure. So, the lubrication of a spline coupling is vital in ensuring proper functioning of the shaft.
The design of a spline coupling can be optimized to enhance its wear resistance and reliability. Surface treatments, loads, and rotation affect the friction properties of a spline coupling. In addition, a finite element method was developed to predict wear of a floating spline coupling. This method is feasible and provides a reliable basis for predicting the wear and fatigue life of a spline coupling.

They can be machined using a slotting or shaping machine

Machines can be used to shape splined shafts in a variety of industries. They are useful in many applications, including gearboxes, braking systems, and axles. A slotted shaft can be manipulated in several ways, including hobbling, broaching, and slotting. In addition to shaping, splines are also useful in reducing bar diameter.
When using a slotting or shaping machine, the workpiece is held against a pedestal that has a uniform thickness. The machine is equipped with a stand column and limiting column (Figure 1), each positioned perpendicular to the upper surface of the pedestal. The limiting column axis is located on the same line as the stand column. During the slotting or shaping process, the tool is fed in and out until the desired space is achieved.
One process involves cutting splines into a shaft. Straddle milling, spline shaping, and spline cutting are 2 common processes used to create splined shafts. Straddle milling involves a fixed indexing fixture that holds the shaft steady, while rotating milling cutters cut the groove in the length of the shaft. Several passes are required to ensure uniformity throughout the spline.
Splines are a type of gear. The ridges or teeth on the drive shaft mesh with grooves in the mating piece. A splined shaft allows the transmission of torque to a mate piece while maximizing the power transfer. Splines are used in heavy vehicles, construction, agriculture, and massive earthmoving machinery. Splines are used in virtually every type of rotary motion, from axles to transmission systems. They also offer better fatigue life and reliability.
Slotting or shaping machines can also be used to shape splined shafts. Slotting machines are often used to machine splined shafts, because it is easier to make them with these machines. Using a slotting or shaping machine can result in splined shafts of different sizes. It is important to follow a set of spline standards to ensure your parts are manufactured to the highest standards.
A milling machine is another option for producing splined shafts. A spline shaft can be set up between 2 centers in an indexing fixture. Two side milling cutters are mounted on an arbor and a spacer and shims are inserted between them. The arbor and cutters are then mounted to a milling machine spindle. To make sure the cutters center themselves over the splined shaft, an adjustment must be made to the spindle of the machine.
The machining process is very different for internal and external splines. External splines can be broached, shaped, milled, or hobbed, while internal splines cannot. These machines use hard alloy, but they are not as good for internal splines. A machine with a slotting mechanism is necessary for these operations.