Material

30+ Years Experienced custom fastener manufacturer & factory committed 0 PPM for production - Chuanghe Fastener

Chuanghe Fastener Co., Ltd (CHE)

Materials & Surface Treatments

Chuanghe Fastenter runs both cold heading and CNC turning workshops to select optimal manufacturing solutions for standard and non-standard fasteners. We support stainless steel, alloy steel, aluminum, titanium and other materials, with full surface treatment options including passivation, Dacromet, plating and anodizing. Flexible capacity covers prototypes, small batches and mass orders. Strict in-house QC with 100% qualification guarantee within contract; full refund for defective items. One-stop custom service for global buyers.

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While machining may have higher labor and setup costs compared to some mass production processes, its advantages in precision, material versatility, and flexibility make it an indispensable manufacturing method for various industries, including aerospace, automotive, medical, and general engineering applications.

Precision and accuracy

Machining processes allow for the production of components with extremely tight tolerances and high dimensional accuracy, crucial for applications requiring precise fits and alignments.

Complex geometries

Modern CNC machining centers can produce intricate and complex shapes, enabling the manufacturing of customized and specialized components for various industries.

Material versatility

Machining can be applied to a wide range of materials, including metals, plastics, composites, and ceramics, providing flexibility in material selection.

Excellent surface finish

Depending on the machining process and parameters, machined components can achieve superior surface finishes, reducing the need for additional finishing operations.

Flexibility and prototyping

Machining lends itself well to low-volume production, prototyping, and customization, allowing for quick turnaround times and design iterations.

High strength and integrity

Machined components retain the bulk properties of the parent material, ensuring high strength, toughness, and structural integrity.

Minimal waste

Machining processes generate relatively low material waste compared to some other manufacturing methods, contributing to cost-effectiveness and sustainability.

Quality control

Machining processes can be closely monitored and controlled, enabling consistent quality and reducing the risk of defects or variations.

Application Fields

Machined parts are commonly employed across a wide range of industries and applications due to their precision, reliability, and versatility. Here are some typical scenarios where machined parts are utilized: These are just a few examples of the diverse applications of machined parts across various industries, highlighting their importance in modern manufacturing and technology.

Automotive Industry

Machined components are integral to automotive manufacturing, used in engines, transmissions, suspension systems, braking systems, and chassis components.

Aerospace and Defense

Machined parts play a crucial role in aircraft and spacecraft construction, including engine components, structural parts, landing gear, avionics, and weaponry.

Medical Sector

Precision machined parts are essential for medical devices, surgical instruments, implants, prosthetics, and diagnostic equipment.

Electronics and Technology

Machined parts are utilized in the production of electronic devices, computer hardware, telecommunications equipment, and semiconductor machinery.

Industrial Machinery

Machined components are vital in the fabrication of industrial machinery, including pumps, compressors, turbines, generators, and hydraulic systems.

Oil and Gas Sector

Machined parts are employed in drilling equipment, pumps, valves, pipelines, and offshore platforms.

Construction and Infrastructure

Machined parts find application in construction machinery, building materials, infrastructure projects, and heavy equipment.

Consumer Goods

Machined components are utilized in consumer products such as appliances, power tools, furniture, sporting goods, and recreational vehicles.

Food and Beverage Industry

Machined parts are used in food processing equipment, packaging machinery, and agricultural machinery.

Renewable Energy

Machined parts are integral to the manufacturing of wind turbines, solar panels, hydroelectric equipment, and geothermal systems.

ADVANTAGES

High strength and durability

The cold forging process work-hardens the material, resulting in increased strength, hardness, and fatigue resistance, crucial for high load-bearing applications.

Dimensional accuracy and precision

Cold forging allows for tight tolerances and precise dimensions, minimizing secondary machining operations, essential for industries like aerospace and electronics.

Complex geometries

Intricate and complex shapes can be produced in a single operation, reducing secondary operations and costs. Improved surface finish: Cold forged components often exhibit superior surface quality, requiring minimal additional finishing.

Material utilization

Cold forging involves little to no material waste, leading to significant cost savings, especially for expensive alloys.

High production rates

Once optimized, cold forging enables consistent, high-volume production with minimal cycle times.

Grain refinement

Severe plastic deformation during cold forging refines grains, enhancing strength, toughness, and fatigue life.

Cost-effectiveness

Despite high initial tooling costs, overall production costs are often lower than other processes due to reduced material waste, fewer secondary operations, and high production rates.

Available Raw Materials

Cold forging, also known as cold heading or cold forming, is a metalworking process that involves the plastic deformation of metals at or near room temperature to produce various components or parts. The selection of materials for cold forging is crucial as it affects the quality, strength, and performance of the final product. Here are some commonly used materials for cold forging:

Carbon Steels

● Carbon steels are the most widely used materials for cold forging. They are classified into low-carbon steels (C ≤ 0.25%) and medium-carbon steels (0.25% < C ≤ 0.6%). Low-carbon steels offer excellent plasticity and ductility, making them suitable for small and thin-walled components. As the carbon content increases, the strength and hardness of the steel increase, making it suitable for larger and thicker-walled parts. Typical carbon steel grades used in cold forging include 10#, 20#, 35#, and 45#

Alloy Steels

● To further enhance the strength and wear resistance of cold forged parts, alloy elements such as manganese (Mn), chromium (Cr), and nickel (Ni) are added to structural steels. Common alloy steel grades used in cold forging include 35CrMo, 40Cr, and 40CrNiMo. Alloy steels not only possess high tensile strength but also exhibit good ductility, making them ideal for producing complex-shaped components.

Stainless Steels

● Stainless steels are widely used for cold forged components that require excellent corrosion resistance. Common stainless steel grades for cold forging include austenitic grades like 304 and 316, as well as martensitic grades like 410 and 420. While stainless steels generally have good plasticity, they are more challenging to work with compared to carbon and low-alloy steels.

Aluminum and Aluminum Alloys

● Aluminum and its alloys are widely used in the aerospace industry due to their low density. Common aluminum and aluminum alloy grades used in cold forging include 1060, 6061, and 7075. Although aluminum alloys offer high strength, their good thermal conductivity can lead to localized softening during the cold forging process, which requires careful control.

Copper and Copper Alloys

● Copper and copper alloys are known for their excellent thermal and electrical conductivity, making them suitable for producing electrical contact components. Common copper materials used in cold forging include oxygen-free copper, electrolytic tough pitch copper, and copper alloys such as brass and beryllium copper. Copper materials are relatively soft, and special attention is required during cold forging to prevent delamination.

In addition to the aforementioned metallic materials, certain high-performance polymers, such as nylon, can be used to a limited extent for cold forging applications. Different materials offer varying advantages and disadvantages in terms of cost, workability, and performance characteristics.

Standard General Surface Treatment

Surface treatment materials are a diverse range of substances and compounds used to modify the properties and characteristics of surfaces.

Metallic Coatings:

● This includes materials like chromium, nickel, zinc, tin, and various alloys used in processes such as electroplating, electroless plating, and physical vapor deposition (PVD). These coatings enhance corrosion resistance, wear resistance, and conductivity.

Conversion Coatings:

● These are oxide, phosphate, or chromate coatings formed by chemical or electrochemical reactions on the substrate surface. Examples include anodizing, phosphating, and chromate conversion coatings, which provide corrosion protection and improved adhesion for subsequent coatings.

Organic Coatings:

● These include paints, varnishes, lacquers, and powder coatings made from polymeric materials like epoxies, polyurethanes, acrylics, and polyesters. They offer corrosion protection, chemical resistance, and aesthetic appeal.

Ceramic Coatings:

● Materials like oxides, nitrides, and carbides (e.g., titanium nitride, chromium nitride, and silicon carbide) are used to create hard, wear-resistant coatings through processes like chemical vapor deposition (CVD) and physical vapor deposition (PVD).

Thermal Spray Coatings:

● These coatings are applied by melting and spraying materials like metals, ceramics, or cermets (ceramic-metal composites) onto the substrate surface. Examples include tungsten carbide, aluminum oxide, and nickel-chromium alloys used for wear protection and thermal barrier applications.

Diffusion Coatings:

● These coatings are formed by diffusing elements like nitrogen, carbon, or boron into the surface of the substrate material, resulting in hardened surface layers. Examples include nitriding, carburizing, and boriding processes.

Thin-Film Coatings:

These are nanometer-scale coatings applied through techniques like atomic layer deposition (ALD) and molecular beam epitaxy (MBE), offering unique properties like low friction, chemical inertness, and optical characteristics.

The selection of surface treatment materials depends on factors such as the substrate material, desired properties, operating conditions, and cost considerations. These materials play a crucial role in enhancing the performance, durability, and functionality of various products across industries.

"Plating type Salt Spray time(Hour)

● Zinc nickle plating 1000+ hrs，1500 hrs max

● Dacromet 300/500/1000/1500 hrs

● Silver RUSPERT 300/500/1000/1500 hrs

● Teflon 4000/9000 hrs

● Magni 300/500 hrs

Plating type Salt Spray time(Hour)

● HDG 96 hrs

● Black zinc 48/96 hrs

● Green /Yellow/Red Zinc 24/48 hrs

● White/Blue/Color Zinc 4/8/12/24/48/72/240 hrs

● Silver/Black Nickle 4/12/24 hrs

Plating type Salt Spray time(Hour)

● Electrophoresis 48/72 hrs

● Anodize 24/48 hrs

● Brass plating 12/24 hrs

● Tin Plating 24/48 hrs

● Silver plating 12/24 hrs

Plating type Salt Spray time(Hour)

● Gold Plating 12/24 hrs

● PVD 96 hrs

● Brass Plating 2 hrs

● Chrome plating 4/8/24 hrs

● Electroless nickel plating 2 hrs

● Black Oxide 2 hrs

● Painting 12/24/48 hrs"

Industry-Specific Material & Finishing Custom Solutions

High-performance fasteners and CNC machined structural components for critical industries require matched raw materials and qualified surface treatments. Below are our mature material & coating solutions for aerospace, medical, semiconductor and vacuum equipment applications.

Aerospace Fasteners & CNC Structural Components

High-Strength Steel (4340 / 300M / A286 / 4130)

● Cadmium Plating (AMS-QQ-P-416): Classic aerospace anti-corrosion finish with inherent self-lubrication, widely adopted for carrier-based aircraft. Gradually replaced by alkaline zinc-nickel plating.

● Alkaline Zinc-Nickel Plating (AMS2401): Eco-friendly alternative to cadmium plating. Delivers 800–1200 hours salt spray resistance with low hydrogen embrittlement, the mainstream selection for civil aviation.

● Dacromet / Chromate-Free Zinc-Aluminum Flake Coating: Zero hydrogen embrittlement. Mandatory for ultra-high-strength bolts and landing gear components, reaching 1000+ hours salt spray resistance.

● Manganese Phosphating (AMS2485) + MoS₂ Dry Film: Designed for parts ≥200ksi tensile strength where electroplating is prohibited. Commonly used for engine bolts.

● Silver Plating (AMS2410): Maintains self-lubrication up to 480°C. Standard finish for high-temperature engine nuts to prevent thread galling.

● Shot Peening (Almen 0.006–0.012A): Mechanical surface strengthening. Improves fatigue life by over 50%, required for all load-bearing aerospace components.

Titanium Alloy (TC4 / Ti-6Al-4V)

● Titanium Anodizing (AMS2488, Tiodize): Forms dense TiO₂ ceramic film for wear resistance, electrical insulation and mitigation of fretting corrosion.

● MoS₂ Dry Film (AMS2518): Applied after anodizing to eliminate titanium thread seizure. Adopted on 90% of aerospace titanium fasteners.

● PVD-DLC (Diamond-Like Carbon): Friction coefficient as low as 0.05, excellent wear resistance, continuous service temperature up to 350°C. Ideal for high-frequency moving parts on aero engines and landing gear.

● MAO (Micro Arc Oxidation): Thick ceramic coating offering superior abrasion resistance and insulation, suitable for titanium CNC structural components.

Superalloy (Inconel718 / Hastelloy)

● Diffusion Cadmium Plating / Diffusion Silver Plating: Stable performance at 550–600°C, avoiding peeling risks of conventional electroplating. Widely used for combustion chamber bolts.

● WS₂ Dry Film: Ultra-high-temperature lubrication above 450°C, alternative to MoS₂ for fasteners at turbine sections.

● AlCrN / TiN PVD Ceramic Coating: Anti-oxidation and wear-resistant, preventing fretting galling on high-temperature threaded connections.

Aluminum Alloy (2024 / 7075)

●Alodine Chem-Film (MIL-DTL-5541): Thin chromate conversion coating with corrosion protection and excellent paint adhesion. Standard finish for aerospace aluminum parts.

●Hard Anodizing Type III (AMS2469): Coating thickness 25–80 μm, hardness HV500–800. Perfect for aluminum nuts and flight control mechanisms requiring high wear resistance.

Implants, Surgical Instruments & Medical Equipment Fasteners

Core requirements: Cleanroom compatibility, low outgassing, low magnetism, low dust generation and stable electrical conductivity.

Implant-Grade Titanium (TA2 / TC4 / Ti-13Nb-13Zr)

Electropolishing (EP) + Biological Passivation: Surface roughness Ra＜0.2μm, free of residual contaminants. Resists autoclave, ethylene oxide and plasma sterilization. Used for orthopedic screws and dental implants.
SLA Blasting & Acid Etching: Al₂O₃ blasting followed by HF/HNO₃ etching to expand bone contact area, the mainstream surface treatment for bone implants.
Calcium-Phosphate Contained MAO: Forms hydroxyapatite-like surface layer to facilitate osseointegration for bone screws and bone plates.
Plasma Sprayed HA (Hydroxyapatite): Coating thickness 50–150 μm, delivers strong osteoconduction for load-bearing implants.
Anodizing (Colored / Natural Finish): Provides wear resistance, insulation and corrosion resistance for small implant components and instrument screws.

Medical Stainless Steel (316L / 316LVM / Cobalt-Chrome)

Medical-Grade Passivation (Citric / Low-Nitric Acid Process): Free of free iron residues, resistant to glutaraldehyde, alcohol and hydrogen peroxide disinfection.
Electropolishing + Ultra-Clean Washing: Surface roughness Ra＜0.4μm, particle-free and sterile, applied to surgical instrument screws and endoscope components.
Biocompatible PVD-TiN / TiCN: Golden appearance, wear-resistant, sterilizable and low friction for medical device fasteners.

Biodegradable Magnesium Alloy Bone Screws

MAO + Fluoride Sealing: Regulates degradation rate and enhances corrosion resistance in body fluid environments.

Semiconductor, Precision Electronics & Vacuum Equipment

Core requirements: Biocompatibility, sterilization stability, low nickel/chromium content, minimized allergic risk and controlled osseointegration.

Stainless Steel (304L / 316L / Low-Magnetic Stainless Steel)

Chromate-Free Ultra-Clean Passivation: Nitric/citric acid treatment with multi-stage DI water rinsing, suitable for Class 1–1000 cleanroom environments.
Kolsterising (Low-Temperature Carburizing): Surface hardening, non-magnetic, rust-free and particle-free, preferred for screws inside semiconductor vacuum chambers.
Electropolishing + Vacuum Baking: Surface roughness Ra＜0.8μm, ultra-low outgassing (＜1e-10 Torr·L/s) for vacuum chambers and lithography equipment fasteners.

Titanium Alloy (Gr2 / Gr5)

Vacuum Anodizing (Thin Oxide Film): Low outgassing, insulation and wear resistance for vacuum chambers and ion implanter components.
Chemical Gold Plating (0.5–2 μm): Contact resistance ＜0.1 mΩ, used for RF/microwave modules and probe station fasteners.
High-Purity Silver Plating: Extremely low contact resistance and high thermal conductivity for high-frequency threaded fasteners.

Aluminum Alloy (6061 / 7075)

High-Purity Anodizing (Sealed & DI Water Rinsed): Resists plasma and acid-base corrosion for semiconductor equipment structural parts.

Exclusive Semiconductor Coatings

Hydrogen-Free DLC: Low friction, abrasion resistant and dust-free, for precision motion screws and wafer carrier fasteners.
Graphene Coating: High conductivity, wear-resistant and low particle generation for precision electronic components.
High-Clean Grade PTFE Dry Film: Low friction, anti-sticking and chemical resistant, prevents thread galling inside vacuum & cleanroom systems.

30 years of experience in high-precision fasteners. Contact us to discuss your project requirements.

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Our defect rate standard is 0 PPM.

Our production range includes CNC processing center, automatic lathing, automatic milling, wire cutting, powder metallurgy processing and assembly of metal parts with plastic parts.

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WhatsApp: +86 13924354629

Email: info3@dgchuanghe.com

Tel: 0086-13924354629

Address: RM302,No.4 building Lizhou industrial Park, Shangshanqi, Zhushan District, Dongcheng Town, Dongguan City, China