China wholesaler 1.7035/5140/40cr Forged/Hot Rolled Steel Flat Bar/Steel Round Bar/Alloy Forged Steel Block/Alloy Steel Rod with Best Sales

Product Description

1.7035/5140/40Cr Forged/Hot Rolled Steel Flat Bar/Steel Round Bar/Alloy Forged Steel Block/Alloy Steel Rod

Hot Rolled Round: dia.10-260 mm.
Forged Round: dia.100-1500 mm.
Cold Drawn Round: dia.2.5-70 mm.

Delivery Condition

EAF+LF+VD, Hot Rolled or Forged or Cold Drawn, Black surface or Machined surface (Peeled, Turned, Grinded), UT 100% Passed.


5140 41Cr4 41CrS4 1.7035 SCr440 40Cr

Chemical Composition(%)

Steel Grade C Si Mn P S Cr
41Cr4 1.7035 0.38-0.45 0.15-0.35 0.50-0.80 ≤ 0.035 ≤ 0.035 0.90-1.20
41CrS4 0.38-0.45 0.15-0.35 0.50-0.80 0.571-0.040 ≤ 0.035 0.90-1.20
5140 0.38-0.45 0.15-0.35 0.50-0.80 ≤ 0.035 ≤ 0.035 0.90-1.20
SCr440 0.38-0.44 0.15-0.35 0.60-0.90 ≤ 0.030 ≤ 0.030 0.90-1.20
40Cr 0.37-0.44 0.17-0.37 0.50-0.80 ≤ 0.035 ≤ 0.035 0.80-1.10


AISI 5140 Alloy Steel  is medium carbon tempered steel, which is cold heading steel and easy to process, after proper heat treatment it can obtain a certain toughness, plasticty and abrasion resistance.


After tempering,it is used to manufacture mechanical parts that can bear medium load and moderate speed, such as steering knuckle of automobile, rear axle, gears, shafts, worm shafts, spline shafts and center sleeves on machine tools.

Delivery Time: 7-10 working days for steel in stock. 20-60 working days for direct production based on the quantity.

Our Independent Laboratory

In order to guarantee a uniform good quality, ShengHe perform necessary testing and inspection according to international standards and specifications.

ShengHe has its own lab with full equipments and a team of professional Q&A and CZPT engineers to do all the tests and analysis of the materials: chemical analysis, mechanical test, UT test, microstructure analysis, hardness checking, etc. The lab also provide third party inspection service.

  •  Ultrasonic testing

  •  Spectrographical analysis

  •  Hardness testing

  • Microstructure analysis

  • Tensile testing

  •  Impact testing

We do pre-shipment inspection on all product before shipment

Our Factory

Our Product(steel round bars, flat bars, forged blocks,precision finished mold plate)

Our loading pictures for flat steel

Our loading pictures for round steel and mold accessories

Our loading pictures and packing for precision ground mold plate

Q1: Are you a trading company or manufacturer?
We belongs to HangZhou Zhongye Group,we also have our own factory for steel raw material sales and machining.Apart from our own mill, we can also provide material from other mills based on customer’s different requirement.

Q2:What is the major steel grade your company offer?
S50C/S55C/S45C/1.2311/718/1.2738/1.2316/1.2083/1.2312/1.2714/H13/H11/D2/D3/O1/O2/4140/4340/5140/8620/52100/M2/M35/M42, etc, in round bar, flat bar and plate, and also semi-finished or precision ground flat bars.

Q3:What service does ShengHe Metal Provide?
Apart from sales of raw materail, we do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. 

Q4: What do you do to control product quality?
Before loadnig into container, all product will go through pre-shipment inspection by our professional QC group. UT test shalled be applied to steel material, according to Sep 1921 C/c,D/d,or E/e level based on different type of steel.

Q5:What is your MOQ?
Our MOQ each order is around 25 Tons(one container), customer can mix different types of steel to reach this quantity.

Q6: Can we visit your company and factory? 
Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come. 

Standard Length Splined Shafts

Standard Length Splined Shafts are made from Mild Steel and are perfect for most repair jobs, custom machinery building, and many other applications. All stock splined shafts are 2-3/4 inches in length, and full splines are available in any length, with additional materials and working lengths available upon request and quotation. CZPT Manufacturing Company is proud to offer these standard length shafts.

Disc brake mounting interfaces that are splined

There are 2 common disc brake mounting interfaces, splined and center lock. Disc brakes with splined interfaces are more common. They are usually easier to install. The center lock system requires a tool to remove the locking ring on the disc hub. Six-bolt rotors are easier to install and require only 6 bolts. The center lock system is commonly used with performance road bikes.
Post mount disc brakes require a post mount adapter, while flat mount disc brakes do not. Post mount adapters are more common and are used for carbon mountain bikes, while flat mount interfaces are becoming the norm on road and gravel bikes. All disc brake adapters are adjustable for rotor size, though. Road bikes usually use 160mm rotors while mountain bikes use rotors that are 180mm or 200mm.

Disc brake mounting interfaces that are helical splined

A helical splined disc brake mounting interface is designed with a splined connection between the hub and brake disc. This splined connection allows for a relatively large amount of radial and rotational displacement between the disc and hub. A loosely splined interface can cause a rattling noise due to the movement of the disc in relation to the hub.
The splines on the brake disc and hub are connected via an air gap. The air gap helps reduce heat conduction from the brake disc to the hub. The present invention addresses problems of noise, heat, and retraction of brake discs at the release of the brake. It also addresses issues with skewing and dragging. If you’re unsure whether this type of mounting interface is right for you, consult your mechanic.
Disc brake mounting interfaces that are helix-splined may be used in conjunction with other components of a wheel. They are particularly useful in disc brake mounting interfaces for hub-to-hub assemblies. The spacer elements, which are preferably located circumferentially, provide substantially the same function no matter how the brake disc rotates. Preferably, 3 spacer elements are located around the brake disc. Each of these spacer elements has equal clearance between the splines of the brake disc and the hub.
Spacer elements 6 include a helical spring portion 6.1 and extensions in tangential directions that terminate in hooks 6.4. These hooks abut against the brake disc 1 in both directions. The helical spring portion 5.1 and 6.1 have stiffness enough to absorb radial impacts. The spacer elements are arranged around the circumference of the intermeshing zone.
A helical splined disc mount includes a stabilizing element formed as a helical spring. The helical spring extends to the disc’s splines and teeth. The ends of the extension extend in opposite directions, while brackets at each end engage with the disc’s splines and teeth. This stabilizing element is positioned axially over the disc’s width.
Helical splined disc brake mounting interfaces are popular in bicycles and road bicycles. They’re a reliable, durable way to mount your brakes. Splines are widely used in aerospace, and have a higher fatigue life and reliability. The interfaces between the splined disc brake and BB spindle are made from aluminum and acetate.
As the splined hub mounts the disc in a helical fashion, the spring wire and disc 2 will be positioned in close contact. As the spring wire contacts the disc, it creates friction forces that are evenly distributed throughout the disc. This allows for a wide range of axial motion. Disc brake mounting interfaces that are helical splined have higher strength and stiffness than their counterparts.
Disc brake mounting interfaces that are helically splined can have a wide range of splined surfaces. The splined surfaces are the most common type of disc brake mounting interfaces. They are typically made of stainless steel or aluminum and can be used for a variety of applications. However, a splined disc mount will not support a disc with an oversized brake caliper.

China wholesaler 1.7035/5140/40cr Forged/Hot Rolled Steel Flat Bar/Steel Round Bar/Alloy Forged Steel Block/Alloy Steel Rod     with Best SalesChina wholesaler 1.7035/5140/40cr Forged/Hot Rolled Steel Flat Bar/Steel Round Bar/Alloy Forged Steel Block/Alloy Steel Rod     with Best Sales