Low-Alloyed Steel for Cold Heading Wire Rods

Cold forging, also known as cold volume forming, is a manufacturing process and a processing method. It is basically the same as the cold stamping process. The cold forging process is also composed of three elements: materials, molds and equipment. Only the materials in the stamping process are mainly sheets, and the materials in the cold forging process are mainly discs or wires. Japan (JIS) call between cold forging (referred to as cold forging) Chinese (GB) called cold heading, some of the screwdriver plant is also known as love starts

The shape of cold forged parts is becoming more and more complex, from the initial stepped shafts, screws, screws, nuts and conduits to parts with complex shapes. The typical process of the spline shaft is: positively pressing the rod part--the middle part of the upset--squeeze spline; the main process of the spline sleeve is: back-extruding the cup-shaped part--making the ring-shaped part-- - The sleeve is being squeezed. The cold extrusion technology of cylindrical gears has also been successfully used in production. In addition to ferrous metals, cold extrusion of copper alloys, magnesium alloys and aluminum alloy materials is becoming more widespread.

Product Applications

Low-alloy steels for cold forging deliver exceptional fabrication plasticity alongside maximum material utilization. Once formed and heat-treated, they achieve premium strength, making them the premier choice for manufacturing critical components across diverse industries. Applications ▪ Automotive & Motorcycle Engineering: Widely engineered for critical safety-related components, including engine connecting rod bolts, drive shafts, and differential gears. ▪ Standard Fasteners: Covers a comprehensive range of nuts, pins, and ultra-high-strength bolts with property classes up to 14T. ▪ Civil Engineering & Construction: Ideal for structural connection components and high-load architectural joints. ▪ Green Energy & Wind Power: Extensively applied in wind turbine foundation fasteners and heavy-duty anchor systems. ▪ Industrial Heavy Machinery: Well-suited for critical components in heavy equipment and rugged machinery parts. ▪ High-Torque Pneumatic Hand Tools: Specifically chosen for tool components subjected to high-frequency and severe cyclical operations.

DS / DL / EC Softened Cold Heading Wire Rod

Characteristics ▪ Utilizes in-line specialized heat treat

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DS / DL / EC Softened Cold Heading Wire Rod

Characteristics

▪ Utilizes in-line specialized heat treatment technologies (such as controlled rolling) to provide the wire rod, immediately post-rolling, with a level of softness equivalent to that of conventional off-line spheroidizing annealing.
▪ Exhibits lower tensile strength combined with excellent deformability.
▪ Effectively extends the service life of forging dies.
▪ Enables direct elimination of the annealing process during secondary processing (such as prior to wire drawing or cold forging).
▪ Delivers substantial cost reductions and energy-saving benefits.


Applications

▪ Various types of bolts.
▪ Nuts.
▪ Pins.
▪ Cold-forged components such as piston rods.

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High-strength Non-quenched and Tempered Wire Rod

Characteristics ▪ Achieves high strength through speciali

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High-strength Non-quenched and Tempered Wire Rod

Characteristics

▪ Achieves high strength through specialized chemical composition design and Easy Drawing and Controlled Cooling (EDC) technology.
▪ Eliminates the need for conventional quenching and tempering (Q&T) heat treatments post-forming.
▪ Substantially reduces manufacturing costs and process steps by omitting subsequent heat treatments.
▪ Eliminates thermal distortion and warping issues (runout/deflection) typically encountered during the heat treatment of long bolts.


Applications

▪ Hex bolts and flange bolts in 7T and 8T strength grades.
▪ Stud bolts in 10T strength grade and 10.9 property class.
▪ U-bolts.

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Cold-forging Case-hardening Steel

Characteristics ▪ Achieves exceptional cold forgeability

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Cold-forging Case-hardening Steel

Characteristics

▪ Achieves exceptional cold forgeability and low deformation resistance through chemical composition optimization (reduced Si and Mn content combined with an increased Cr content).
▪ Effectively suppresses grain coarsening during subsequent carburizing by utilizing controlled rolling and micro-precipitates (such as Nb).
▪ Suppresses grain boundary oxidation during carburizing by minimizing oxide-forming elements.
▪ Enables direct elimination of the annealing process prior to cold forging.
▪ Enables direct elimination of the normalizing treatment prior to carburizing.


Applications

▪ Automotive differential gears (e.g., side gears and pinion gears).
▪ Drive shafts.
▪ Other high-strength automotive components requiring carburizing treatment.

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High-strength Delayed-fracture-resistant Steel

Characteristics ▪ Features a proprietary chemical composi

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High-strength Delayed-fracture-resistant Steel

Characteristics

▪ Features a proprietary chemical composition design.
▪ Specifically engineered for high-strength, premium-quality fasteners.
▪ The ADS series consistently satisfies strength grades up to 12T.
▪ The MB series, when paired with high-temperature quenching, meets the stringent requirements for ultra-high-tensile bolts with strength grades up to 14T.


Applications

▪ Flange bolts.
▪ Hex bolts.
▪ Engine connecting rod bolts.
▪ Cylinder head bolts.
▪ High-strength bolts for civil engineering and construction.

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Graphitic Steel for Cold Forging

Characteristics ▪ Precipitates carbon within the steel in

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Graphitic Steel for Cold Forging

Characteristics

▪ Precipitates carbon within the steel in the form of finely dispersed, easily deformable "graphite" particles.
▪ Maintains a soft matrix close to that of pure iron (ferrite), successfully resolving the difficulty of cold forging high-carbon steels.
▪ Delivers exceptional cold forgeability and machinability, effectively extending the service life of both dies and cutting tools.
▪ Post-forming, subsequent heat treatments such as induction hardening or carburizing and quenching can re-dissolve the graphite back into the matrix as a solid solution.
▪ Imparts extremely high final strength to the components, perfectly balancing the dual demands for "ultra-soft" processability and "ultra-strong" end performance.


Applications

▪ Machinery structural components requiring superior workability and machinability.
▪ Induction-hardened components where the final product demands high strength.

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High-strength Steel for Wind Power Applications

Characteristics ▪ Belongs to the chromium-molybdenum low-

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High-strength Steel for Wind Power Applications

Characteristics

▪ Belongs to the chromium-molybdenum low-alloy steel family (SAE 4140 steel series).
▪ Exhibits exceptionally high tensile strength combined with high hardness.
▪ Delivers excellent high- and low-temperature impact toughness to withstand harsh outdoor operating environments.


Applications

▪ Wind turbine foundation fasteners.
▪ Property class 10.9 high-strength bolts.
▪ High-strength nuts.

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Boron-alloyed Cold Heading Steel

Characteristics ▪ Reduces the content of carbon and other

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Boron-alloyed Cold Heading Steel

Characteristics

▪ Reduces the content of carbon and other alloying elements, thereby lowering the material's tensile strength and deformation resistance during hot rolling and forging.
▪ Significantly extends the service life of cold-forging dies (e.g., increasing die life from 60,000 to 180,000 strokes).
▪ Adds trace amounts of boron to compensate for and ensure the material's hardenability during heat treatment, successfully achieving the required strength.
▪ Effectively reduces manufacturing costs in production and subsequent processing.


Applications

▪ Widely used to replace conventional medium-carbon steels (such as the SWRCH 45K grade).
▪ Various types of steel bolts.

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Steel data

Standard Code Spec No. Material No. Mark
JIS G3509-1 SMn420RCH
JIS G3509-1 SMn420HRCH
JIS G3509-1 SMnC420RCH
JIS G3509-1 SCr415RCH
JIS G3509-1 SCr415HRCH
JIS G3509-1 SCr420RCH
JIS G3509-1 SCr420HRCH
JIS G3509-1 SCr430RCH
JIS G3509-1 SCr430HRCH
JIS G3509-1 SCr435RCH
JIS G3509-1 SCr435HRCH
JIS G3509-1 SCr440RCH
JIS G3509-1 SCr440HRCH
JIS G3509-1 SCM415RCH
JIS G3509-1 SCM415HRCH
JIS G3509-1 SCM420RCH
JIS G3509-1 SCM420HRCH
JIS G3509-1 SCM430RCH
JIS G3509-1 SCM435RCH
JIS G3509-1 SCM435HRCH
JIS G3509-1 SCM440RCH
JIS G3509-1 SCM440HRCH
JIS G3509-1 SCM822RCH
JIS G3509-1 SCM822HRCH
JIS G3509-1 SNC415RCH
JIS G3509-1 SNC415HRCH
JIS G3509-1 SNC631RCH
JIS G3509-1 SNC631HRCH
JIS G3509-1 SNC815RCH
JIS G3509-1 SNC815HRCH
(C)% (Si)% (Mn)% (P)% (S)% (Ni)% (Cr)% (Mo)% Remarks
0.17~0.23 0.15~0.35 1.2~1.5 ≦ 0.03 ≦ 0.03 ≦ 0.25 ≦ 0.35 不純物Cu不得超出0.3%
0.16~0.23 0.15~0.35 1.15~1.55 ≦ 0.03 ≦ 0.03 ≦ 0.25 ≦ 0.35 不純物Cu不得超出0.3%
0.17~0.23 0.15~0.35 1.2~1.5 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.35~0.7 不純物Cu不得超出0.3%
0.13~0.18 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 不純物Cu不得超出0.3%
0.12~0.18 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 不純物Cu不得超出0.3%
0.18~0.23 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 不純物Cu不得超出0.3%
0.17~0.23 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 不純物Cu不得超出0.3%
0.28~0.33 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 不純物Cu不得超出0.3%
0.27~0.34 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 不純物Cu不得超出0.3%
0.33~0.38 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 不純物Cu不得超出0.3%
0.32~0.39 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 不純物Cu不得超出0.3%
0.38~0.43 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 不純物Cu不得超出0.3%
0.37~0.44 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 不純物Cu不得超出0.3%
0.13~0.18 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.15~0.25 不純物Cu不得超出0.3%
0.12~0.18 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.3 不純物Cu不得超出0.3%
0.18~0.23 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.15~0.25 不純物Cu不得超出0.3%
0.17~0.23 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.3 不純物Cu不得超出0.3%
0.28~0.33 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.15~0.3 不純物Cu不得超出0.3%
0.33~0.38 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.15~0.3 不純物Cu不得超出0.3%
0.32~0.39 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 不純物Cu不得超出0.3%
0.38~0.43 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.15~0.3 不純物Cu不得超出0.3%
0.37~0.44 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 不純物Cu不得超出0.3%
0.2~0.25 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.2 0.35~0.45 不純物Cu不得超出0.3%
0.19~0.25 0.15~0.35 0.55~0.95 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.35~0.45 不純物Cu不得超出0.3%
0.12~0.18 0.15~0.35 0.35~0.65 ≦ 0.03 ≦ 0.03 2~2.5 0.2~0.5 不純物Cu不得超出0.3%
0.11~0.18 0.15~0.35 0.3~0.7 ≦ 0.03 ≦ 0.03 1.95~2.5 0.2~0.55 不純物Cu不得超出0.3%
0.27~0.35 0.15~0.35 0.35~0.65 ≦ 0.03 ≦ 0.03 2.5~3 0.6~1 不純物Cu不得超出0.3%
0.26~0.35 0.15~0.35 0.3~0.7 ≦ 0.03 ≦ 0.03 2.45~3 0.55~1.05 不純物Cu不得超出0.3%
0.12~0.18 0.15~0.35 0.35~0.65 ≦ 0.03 ≦ 0.03 3~3.5 0.6~1 不純物Cu不得超出0.3%
0.11~0.18 0.15~0.35 0.3~0.7 ≦ 0.03 ≦ 0.03 2.95~3.5 0.55~1.05 不純物Cu不得超出0.3%