PTJ Manufacturing Shop

PTJ Manufacturing Shop

Which alloy steels are often used in machining auto parts ?

Machining alloy steels auto parts

PTJ Manufacturing Shop is a professional manufacturer specializing in the precision machining of high-quality alloy steel parts. It is one of the few well-known manufacturers in Dongguan with auto parts machining qualification. At present, the company has successfully passed the IATF16949 quality management certification in the automotive field and strictly followed Its execution.

5-axis linkage machiningWe all know that the use of alloy steel is indispensable when manufacturing auto parts. Today, PTJ Manufacturing Shop lists ten commonly used alloy material models and their corresponding fields of use.


Used to manufacture large parts and components that work under high stress and strong wear conditions, such as universal joint shafts, gears, connecting rods, crankshafts, small shafts, spindles working in rolling bearings on ZTE, and large gears. Transmission spline shafts on automobiles and mandrels subjected to impact loads can also be used to manufacture leaf springs and coil springs;


Used to manufacture parts that work under high stress and wear conditions. When machining parts with a diameter of less than 60mm, the material characteristics are similar to those of 40Cr steel. It can be used for universal joint shafts and axles of automobiles, agricultural machinery, tractors and general machinery. , connecting rod cover, shaft, friction disc, gear, worm, gear shaft, electric car and steam engine axle, car shaft and heavy load machine, etc., and nuts and bolts in cold-drawn state;


Suitable for manufacturing parts and components under no-load conditions, such as semi-axles, crankshafts, shaft cores, worms, piston rods, joysticks, connecting rods, levers, etc., as well as screws, bolts, and reinforcement rings under load working conditions. , springs and other parts that need to be modulated, when manufacturing parts with a diameter of less than 40mm, the characteristics are close to 40Cr steel;


This material is mainly used to manufacture connecting rods, crankshafts, mandrels, half shafts, joysticks, fan fittings, and cold head bolts with a diameter of less than 15 mm and mechanical components subjected to higher stresses. When manufacturing parts with a diameter of less than 20 mm, Can replace 40Cr steel material;


This material is mainly used to manufacture fasteners with small cross-sections, such as cars and tractors, general frame rails for agricultural machinery, gears for gearboxes, cold head bolts, shafts, etc., suitable for manufacturing in the field of mining machinery. Carburizing parts with high strength of the heart, such as the rear axle and journal of the crane;


It is more suitable for manufacturing parts with small cross-section, generally less than 50mm in diameter. This material can replace 20Cr steel, and is often used to make carburized gears and relatively small shaft core products, as well as cross pins that are not very demanding. Piston pins, valve rams and oil collector sleeves can also be used as quenched and tempered steel, for example to make cold head bolts;


Used to manufacture medium-speed, medium-load or high-load but low-impact parts, such as transmission gears, connecting rods, mandrels, electric axles, worms, flywheels, etc., can also be used to manufacture turbine impellers, 400° C important fastener products;


Hot stamped parts used to make high toughness and wear resistance can also be used to make parts without heat treatment, or used after normalizing, such as tractor track pins, and can also be used to make cast parts;


It is suitable for the manufacture of parts with relatively large load, such as connecting rod bolts, tie rods, crankshafts, gears, etc. It can replace 30CrNi3 to manufacture important modulation parts with a section diameter less than 80mm. When surface hardening process is used, it can manufacture larger cross-sectional area. Components;


It is suitable for the manufacture of boilers, high-pressure vessels, large high-pressure pipes, etc. It can also be used for stamping steel, such as bicycle chains, gears, piston pins, etc. It can also be used to manufacture mine links with a diameter of not more than 20mm;

PTJ Manufacturing Shop is currently equipped with more than 100 sets of high-precision CNC telling equipment, including Doosan Auto-milling compound, Jinshang, Star, Nomura and other brands of CNC machine, 850 and four-axis, five-axis linkage machining center totaling more than 50 sets. The precision of the product can reach 0.01mm, which has significant advantages in the processing of precision parts of alloy steel.

PTJ Machining Capabilities

Automatic Bar Machining Multi-spindle cam automatic screw machines
CNC Turning – CNC delivers peak cost efficiency in shorter volumes, as well as high capacity production of mechanically simple components
Custom Machining - with up to 12 axes of control
Multi Spindle Machining- ISO 9001:2015 certified
Screw Machine Products – The number of customized production parts per hour can reach 10000pcs
Swiss Machining – with up to 9 axes of CNC control, to produce precision components with complex geometries in one operation
High Volume Machining – 100 Advanced Production Turning Bar Automatics On-line and Ready
CNC Milling - Machining Fully compliant with the exacting requirements of our customers
5 axis (11 axis) Machining – Tolerance | 0.1mm alignment

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