Trunk Hinges

Name: Trunk Hinges
Brand: CBIES Precision Seamless Steel Welded Tube Manufacturer
Availability: InStock
Rating: 4.5 (89 reviews)

The automotive trunk hinge serves the purpose of connecting the car's rear hatch to the main body of the automobile, functioning as a critical automotive component. Its primary role is to support and maintain the open position of the trunk, and it is one of the essential elements ensuring driving safety and convenience. In daily use, it guarantees that the trunk door remains stable in an open position, thereby offering users easy access and storage space.

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Specification
Our advantage

Product Features

The truck hinges are manufactured using hollow square steel tube, and the structure mainly consists of a series of interconnected segments arranged in sequence: the initial end tube, the inclined tube, the first bending tube, a second bending tube with a larger angle, a third bend tube and a horizontal straight tube. These components work in harmony to deliver the hinge's functionality and reliability.

Parameter

Specifications and Sizes

Standard

Grade

Thickness（mm）

Outside Diameter（mm）

VDA239-100

CR1,CR2

1.5-2.5

20x20,22x22,25x25,25x30,30x30,etc.

JIS G 3141 :2017

SPCC

1.5-2.5

20x20,22x22,25x25,25x30,30x30,etc.

For requirements out of the established specification range, we can arrange the trial production after further discussion and agreement.

Chemical Composition (Heat Analysis) (%)

Grade	C	Mn	P	S	Alt	Ni
CR1	≤0.13	≤0.6	≤0.035	≤0.035	---	≥0.008
CR2	≤0.10	≤0.5	≤0.025	≤0.020	≥0.015	---
SPCC	≤0.15	≤1.0	≤0.1	≤0.035	---	---

Note 1: Chemical Composition based on product (coll or sheet/blank) analysis.

Note 2: The letter C shall be added when a minimum Carbon content of 0.015 % or 0,0003% (3ppm) Boron is required, eg. CR3C.

Note 3: Hot rolled grades with C% < 0.015% must have a minimum of 0.0003% (3ppm) Boron.

Note 4: Total aluminum content (combined and free).

Mechanical Properties

Grade	Status	Rpl (MPa)	Rm (MPa)	A L0=80mm (%)
CR1	Cold Rolled	140-280	270-410	≥28%
CR2	Cold Rolled	140-240	270-370	≥34%
SPCC	Cold Rolled		≥270	≥30%

Hardness

1/8 hardness，1/4 hardness，1/2 hardness, and steel panel/strip of hard material

Hard material
Quenching and tempering differentiation	Quenching and tempering mark	HRB	HV
1/8 hardness	8	50-71	95-130
1/4 hardness	4	65-80	115-150
1/2 hardness	2	74-89	135-185
Full hardness	1	Above 85	Above 170

Tolerances

Outer diameter, wall thickness, length and R-angle tolerances can be customized according to customer requirements.

1.Selecting high-quality carbon steel as the raw material, which boasts favorable mechanical properties, including strength and toughness and demonstrates stable performance during bending, punching and other processing procedures.

2.CBIES uses advanced high-frequency welding technology to ensure the consistent quality of weld joints, effectively minimizing welding defects. This approach enhances the strength and fatigue life of welded areas, thereby guaranteeing the safety of the product during usage.

3.During the welding process, strict control is exerted over welding parameters such as current, voltage and speed to ensure the integrity of the weld quality. Additionally, post-weld treatments are implemented, including online cleaning of the weld seam and real-time inspection for flaws, to confirm there is on defect such as cracks, incomplete penetration and slag inclusion in the welded areas.