Instrument Y12 Light rod Automotive precision parts bolts and nuts polished round small size grinding rod

Grade: Y12 free cutting steel

Standard: GB/T8731-1988

Product process: Polishing, cold drawing

Application of free cutting steel

Used as steel for turning processing, widely used in structural components. Commonly used for manufacturing important mechanical parts such as machine screws, self tapping screws, bolts, nuts, double headed, headless parts, hexagonal bolts, etc.

Chemical composition:

C: 0.08 ~ 0.16

Silicon Si: 0.15 ~ 0.35

Manganese Mn: 0.70 ~ 1.00

P: 0.08 ~ 0.15

Sulfur S: 0.10 ~ 0.20

Mechanical property

Tensile strength σb (MPa) : (hot rolled)390 ~ 540;

(cold drawing) diameter 8 ~ 20 :530 ~ 755; >20 ~ 30 hours :510 ~ 735; >30 hours :490 ~ 685

Elongation δ5 (%) : (hot rolling)≥22; (Cold rolled)≥7.0

Section shrinkage (%) : (hot rolling)≥36

Hardness: (hot rolling)≤170HB; (cold drawn steel) 152-217HB

Y12 light rod is a kind of steel light rod with easy cutting structure, its surface is fine machined, and has a high finish and straightness of the bar.

Application field:

1, Mechanical manufacturing: in machine tool manufacturing, used to manufacture some precision requirements are not very high drive shaft, lead screw and other parts. Because of its good cutting performance, it can reduce processing costs and improve processing efficiency.

2, Auto parts manufacturing: can be used to manufacture some small connectors on the car, bolts, etc. For example, in some pipeline connection parts in the engine compartment of the automobile, the parts processed by the Y12 light rod can meet their performance requirements, and because of the characteristics of easy cutting, it is easy to mass production.

3, Instrument industry: used to manufacture instruments in the small shaft, bracket and other parts. These parts are usually small in size and require certain surface finish and precision, and the characteristics of the Y12 light rod are just right for this type of application.

How to choose a suitable steel rod when making springs：

1, Look at the material:

High carbon steel: with high hardness and wear resistance, suitable for mining, construction and other high wear environment;

Alloy steel: Added alloy elements on the basis of carbon steel, improve the strength and wear resistance, suitable for high-load, high-wear working environment;

Stainless steel: has a corrosion resistance and wear resistance, suitable for harsh environments, while having a beautiful appearance.

2, Look at the specifications and sizes:

Ensure that the diameter, length, roundness and other dimensions of the steel rod meet the standard requirements.

3, Look at the surface quality:

Select steel rods with smooth surfaces, no cracks and no folding to ensure good surface quality.

4, Look at the mechanical properties:

Select steel rods that meet the mechanical properties requirements according to the needs to ensure that their strength and toughness meet the requirements of use.

5, Different materials of steel rod application scenarios:

High carbon steel: suitable for mining, construction and other high wear environment.

Alloy steel ‌ : suitable for high load, high wear working environment, such as crusher, screen and other equipment wear-resistant parts.

Stainless steel ‌ : suitable for corrosion resistance and aesthetic requirements of higher occasions, such as gears, bearings and other mechanical parts ‌.

Our steel rods made by Norline Metal have made many different types of springs, such as:

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