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Alloy Steel Forged Seat Pin, High Strength, Black Oxide Finish

Forged with high strength alloy steel, heat treatment to enhance hardness and tensile strength, suitable for heavy duty scenes ‌. Surface black oxidation treatment enhances corrosion resistance, suitable for wet or high salt environment ‌. 
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Product Overview


This product is made of the highest strength alloy steel (such as 42CrMo, SCM440, 20MnTiB, etc.) through the highest precision forging process  manufacturing of car seat dowels, specially designed for car seat adjustment system, with high load, fatigue resistance and long life characteristics. With the best heat treatment (tempering + quenching and tempering) and the best surface black oxidation treatment, performance and corrosion resistance are improved to meet stringent vehicle specification standards (such as ISO/TS 16949).




Core advantage

1. High strength and durability

- The forging process eliminates the internal defects of the material, the grain flow line is continuous, the tensile strength reaches ≥1000MPa, the hardness HRC 28-32, far exceeding the casting performance.

- Heat treatment optimizes metallographic structure, improves impact resistance and fatigue life, and ADAPTS to high frequency adjustment scenarios.


2. Precision dimension control 

- The forging tolerance can be controlled within ±0.1mm, combined with CNC finishing (optional) to ensure a perfect match with the seat mechanism.


3. Surface black oxidation treatment 

- Form a dense oxide film, rust resistance and wear resistance, surface hardness increase, friction coefficient decrease, prolong service life.


4. Customized adaptation capability

- Support non-standard design (such as shaped pin, multi-level step structure), provide the whole process service from material selection, mold development to mass production.


Custom service 

- Flexible design: Optimize structural strength and process feasibility (DFM analysis) according to customer drawings or samples.

- Fast response : Mold development cycle 2-3 weeks, support small batch trial production (MOQ 500 pieces) to large-scale delivery.

- Quality Assurance: 100% full inspection of key dimensions and hardness, provide material reports and heat treatment curves.





Our work flow chart for all customized design products is as belows:

RFQ阶段samples阶段production阶段




Advantages of Custom Alloy Steel Forged Parts :



  • High strength and excellent performance

Material density : forging process eliminates internal pores and porosity of alloy steel, continuous grain flow line, significantly improves tensile strength (up to ≥1000MPa) and fatigue resistance, suitable for high-load scenarios (such as automobile chassis parts, engineering machinery connectors).

Heat treatment strengthening: Through tempering, quenching and other processes to accurately control hardness (HRC 28-40) and toughness, to meet the diversified needs of wear resistance, impact resistance.


  • Flexible customization and design optimization 

Non-standard adaptation: Support complex geometry (such as special-shaped teeth, multi-step structure) customization, provide DFM (Design for Manufacturability) analysis, optimize structural strength and cost.

Material optional: Suitable for 42CrMo, 4140, 4340 and other alloy steel, according to the requirements of the working condition to match high temperature, corrosion resistance or lightweight characteristics.


  • Surface treatment and durability 

Anti-corrosion enhancement : Optional surface treatment process (such as black oxidation, phosphating, electroplating), salt spray test time ≥72 hours, extend the service life of outdoor or humid environment.

Friction performance optimization: Reduce the coefficient of friction by surface coating or polishing, suitable for moving parts (such as gears, pins).




Packaging:


包装组图_meitu_3




FAQ:


1Q: What is the minimum order quantity (MOQ) for custom alloy steel forging products? 

1A: We support flexible order mode, small batch trial production MOQ can be as low as 100-500 pieces (depending on product complexity). Mold development costs can be allocated to the first order, reducing initial input costs, suitable for new product verification or small-scale upgrade needs.


2Q: Why choose forging process instead of casting or machining? 

2A: Forging process through high pressure molding refining alloy steel grain structure, eliminate internal defects, so that the product has the highest strength (tensile strength ≥1000MPa) and anti-fatigue performance, especially suitable for bearing high load, high frequency impact scenes (such as automobile chassis parts). The cast parts are easy to produce pores, and the pure machined materials have low utilization rate and high cost.


3Q: How long does the production cycle take? Can it be expedited? 

3A: Standard cycle is 5-7 weeks (including mold development 2-3 weeks + forging/heat treatment/surface treatment 3-4 weeks), support expedited service, the fastest compression to 3-4 weeks. Provide phased progress feedback (such as mold acceptance, first article inspection) to ensure that the delivery time is transparent and controllable.


4Q: What are the options for surface treatment? How to choose the right solution?

4A: Anti-rust requirements: black oxidation, phosphating (salt spray test ≥72h), low cost and environmental protection; Wear-resistant requirements: electroplated hard chromium, QPQ treatment, surface hardness up to HV 800 or more; Appearance requirements : sandblasting, polishing, etc.


5Q: Can you provide free samples?

5A: Yes, we can. Customer only needs to pay for the freight cost.



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Nanjing Best International Co., Ltd. is a reputable manufacturer and supplier of industrial components based in China. Our factory is situated in Changzhou City, which can be conveniently reached within 1.5 hours by car from Nanjing.

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