Explore hongqian premium material selection for custom pipe fittings. We combine advanced CNC turning, cold heading, and hot forging processes to deliver superior cnc components across stainless steel, carbon steel, aluminum, and brass.
Stainless Steel: The Corrosion-Resistant Specialist High-precision SS304/316 components. The ideal cost-effective alternative to brass, offering superior durability in harsh environments.
Carbon Steel: High-Strength & Cost-Efficient Optimized for heavy-duty industrial applications. We utilize Cold Heading and CNC turning to provide maximum strength at competitive prices.
Aluminum Alloys: Lightweight & Precision Finishing Perfect for complex geometries. AL6061/7075 grades with premium surface treatments for aerospace and automation industries.
Brass & Custom Alloys: Traditional Reliability Reliable performance for electrical and fluid applications where high conductivity and specific machinability are required.
| Category | USA (AISI/SAE) | China (GB) | Europe (DIN/EN) | Japan (JIS) |
| Austenitic (Economy) | 201 | 1Cr17Mn6Ni5N | — | SUS201 |
| Austenitic (Machining) | 303 | Y1Cr18Ni9 | X12CrNiS188 | SUS303 |
| Austenitic (General) | 304 | 0Cr19Ni9 | X5CrNi189 | SUS304 |
| Austenitic (Standard) | 316 | 0Cr17Ni12Mo2 | X5CrNiMo17-12-2 | SUS316 |
| Austenitic (Marine) | 316L | 00Cr17Ni14Mo2 | X2CrNiMo17-12-2 | SUS316L |
| Ferritic (Stainless Iron) | 430 | 1Cr17 | X6Cr17 | SUS430 |
| Martensitic | 410 | 1Cr13 | X10Cr13 | SUS410 |
| PH Grade | 631 | 0Cr17Ni7Al | X7CrNiAl177 | SUS631 |
To ensure the highest quality and cost advantages for custom components, we control quality from the source and provide a variety of forming solutions:
Diverse Blanking Processes: We flexibly adopt the following processes based on part complexity and strength requirements:
Solid Bar Stock: Optimized for high-precision CNC turning.
Precision Forging & Hot Punching (Red Punching): Provides superior grain structure, ideal for high-pressure, heavy-duty pipe fittings.
Cold Heading: Offers a high-efficiency, low-waste forming solution specifically for fasteners and small components.
Casting & Sand Casting: Suitable for custom irregular pipe fittings with complex geometries.
Material Verification: Every batch of raw material undergoes chemical composition analysis to ensure 100% compliance with international standards such as ASTM, DIN, or JIS.
| Process | Applicable Materials | Purpose & Effect | Pro-Tech Tips (Expert Insight) |
| Ultrasonic Cleaning | All Grades | Removes residual cutting oils, metal chips from threads, and contaminants from blind holes. | Mandatory for high-precision fittings to ensure surface purity before plating or passivation. |
| Passivation | 303, 304, 316L | Removes free iron from the surface and forms a protective chrome-oxide layer to prevent rust. | Recommended for 303: A safer alternative to pickling; enhances corrosion resistance without damaging the finish. |
| Electropolishing (EP) | 304, 316L | Achieves a high-gloss finish (Ra 0.1-0.2), improving hygiene and corrosion resistance. | Risk Warning: Not recommended for 303; sulfur content causes “orange peel” or cloudy patterns. |
| Nickel / Gold Plating | 303, 304, 316L | Nickel provides oxidation resistance; Gold offers superior conductivity and luxury aesthetics. | Adhesion Control: Requires a specific “Nickel Strike” activation layer to prevent plating peel-off on SS substrates. |
| Pickling | 304, 316L | Removes heavy scale and heat-tint from welding or high-temperature processing. | Limitation: Can cause over-etching and black spots on Grade 303 due to sulfur inclusions. |
| Physical Polishing | All Grades | Provides a uniform mirror or brushed finish, masking minor machining marks. | Automation: We use automated equipment to ensure consistent texture across large batches of fittings. |
| China (GB) | USA (AISI/ASTM) | Europe (EN/DIN) | Japan (JIS) |
| 08F / 08 | 1006 / 1008 | C10 | S09CK / S9CK |
| Q195 | ASTM A285 Gr.B | S185 | — |
| Q215 | ASTM A283 Gr.C | USt34-2 | SS330 |
| Q235 | ASTM A570 | S235JR | SS400 |
| 10# | AISI 1010 | C10 / CK10 | S10C |
| 15# | AISI 1015 | C15 / CK15 | S15C |
| 20# | AISI 1020 | C22E / CK22 | S20C |
| Category | USA (AISI) | China (GB) | Europe (EN/DIN) | Japan (JIS) |
| Medium Carbon | 1025 | 25# | C25E / CK25 | S25C |
| Medium Carbon | 1030 | 30# | C30E | S30C |
| Medium Carbon | 1035 | 35# | C35E / CK35 | S35C |
| Medium Carbon | 1040 | 40# | C40E | S40C |
| Medium Carbon | 1045 | 45# | C45E / CK45 | S45C |
| Medium Carbon | 1050 | 50# | C50E / CK53 | S50C |
| Category | USA (AISI) | China (GB) | Europe (EN/DIN) | Japan (JIS) |
| High Carbon | 1055 | 55# | C55E / CK55 | S55C |
| High Carbon | 1060 | 60# | C60E / CK60 | S58C / S60C |
| High Carbon | 1065 | 65# | Ck67 | — |
| Category | USA (AISI/SAE) | China (GB) | Europe (DIN/EN) | Japan (JIS) |
| Chrome Steel | 5120 | 20Cr | 20Cr4 | SCr420 |
| Chrome Steel | 5140 | 40Cr | 41Cr4 | SCr440 |
| Cr-Mo Steel | 4135 | 35CrMo | 34CrMo4 | SCM435 |
| Cr-Mo Steel | 4140 | 42CrMo | 42CrMo4 | SCM440 |
| Ni-Cr-Mo Steel | 4340 | 40CrNiMoA | 36CrNiMo4 | SNCM439 |
| China (GB) | USA (AISI/SAE) | Europe (DIN/EN) | Japan (JIS) |
| Y12 | 1211 | 10S20 | SUM12 |
| Y12Pb | 12L13 | 10SPb20 | SUM22L |
| Y15 | 1213 | 11SMn28 | SUM22 |
| Y15Pb | 12L14 | 11SMnPb28 | SUM24L |
| Y20 | 1117 | 22S20 | SUM31 |
| Y30 | 1132 | 1C30 | — |
| Y35 | 1137 | 1C35 | SUM41 |
| Category | USA (ASTM/AA) | China (GB) | Europe (EN/DIN) | Japan (JIS) |
| Magnesium-Silicon | 6061 | 6061 | AlMg1SiCu | A6061 |
| Magnesium-Silicon | 6063 | 6063 | AlMg0.7Si | A6063 |
| Aluminum-Copper | 2024 | 2024 | AlCu4Mg1 | A2024 |
| Aluminum-Zinc | 7075 | 7075 | AlZn5.5MgCu | A7075 |
| Pure Aluminum | 1050 | 1050 | Al99.5 | A1050 |
| Pure Aluminum | 1100 | 1100 | Al99.0 | A1100 |
| Al-Mg Alloy | 5052 | 5052 | AlMg2.5 | A5052 |
| Category | USA (ASTM/UNS) | China (GB) | Europe (EN/DIN) | Japan (JIS) |
| Free-Cutting Brass | C36000 (C360) | HPb59-1 | CuZn39Pb3 | C3604 |
| Leaded Brass | C37700 | HPb58-3 | CuZn39Pb2 | C3771 |
| Common Brass | C27200 | H63 | CuZn37 | C2720 |
| Cartridge Brass | C26000 | H70 | CuZn30 | C2600 |
| Phosphor Bronze | C51900 | QSn6.5-0.1 | CuSn6 | C5191 |
| Aluminum Bronze | C63000 | QAl10-4-4 | CuAl10Ni5Fe4 | C6301 |
| Pure Copper | C11000 | T2 | E-Cu58 / Cu-ETP | C1100 |
Common Questions
We are originial manufacturer provide oem cnc turning service and Located in Zhejiang, China, our facility is equipped with advanced CNC turning machines and precision inspection equipment to control both quality and cost from the source. .
We work with a wide range of metal materials to meet various industrial standards. Our major materials include carbon steel , stainless steel , aluminum , brass etc .
To send you an accurate quotation, please provide your 2D/3D technical drawings (in STEP, IGES, PDF, or CAD format) along with your estimated order quantity and material requirements. Usually, our engineering team will evaluate the details and provide a competitive quote within 24 hours.
Yes, we highly recommend prototyping and sample testing before placing bulk orders. We can provide custom pipe fittings samples according to your specifications to verify the dimensions, thread standards (such as NPT, BSP,Metric), and tolerances. Sample lead time is typically 10 working days.
As a custom pipe fittings supplier, our moq is 2000pcs .However, because CNC turning involves machine setup, programming, and tooling costs, larger order quantities will significantly lower the unit price. Please send us your project details, and we will find the most cost-effective production plan for you.
We have extensive experience in machining various international thread standards with perfect precision to ensure leak-free connections. Our production capabilities include:
Tapered Pipe Threads: NPT (American National Standard Pipe Thread) and BSPT (British Standard Pipe Taper / PT / R threads), widely used in high-pressure hydraulic systems.
Parallel/Straight Pipe Threads: BSPP (British Standard Pipe Parallel / G threads) and Metric parallel threads, ideal for plumbing and water manifold systems.
Machine & Bolt Threads: Metric (M) threads, UNC/UNF (Unified Coarse/Fine) threads, and BSW (British Standard Whitworth).
Every single batch of threaded fittings undergoes 99% inspection using professional Go/No-Go thread plug gauges and ring gauges to guarantee consistent pitch, depth, and a perfect seal for your industrial applications.
Yes. For every batch of production, we trace and provide the original raw material test reports (Mill Test Certificates) directly from our steel suppliers. Additionally, we use our in-house spectrometer for PMI (Positive Material Identification) testing before and during production to verify the exact chemical composition. We can supply both the supplier’s material certificates and our spectrometer test data upon request to ensure material compliance.
Yes, we do. Depending on your material and specification requirements, we can perform hardness testing and supply the corresponding reports. We routinely measure and certify hardness using standard scales such as Brinell (HB) or Rockwell (HRC), ensuring the fittings possess the exact structural integrity and machinability required for your application.
Yes. We offer high-precision laser marking services for custom branding, part numbers, size specifications, thread types (such as NPT or BSP), and batch tracking numbers. The laser engraving is crisp, permanent, and highly resistant to corrosion or wear, ensuring clear identification throughout the lifecycle of the fitting.
To prevent oxidation and extend the service life of carbon steel products, we provide several industrial-grade surface treatments, as follow is some normal surface treatment :
For stainless steel components, our surface treatments focus on maximizing corrosion resistance and achieving the desired surface roughness (Ra):
Pickling and Passivation: A chemical treatment that removes surface contaminants (like free iron) and restores the chromium oxide passive layer, drastically improving rust resistance.
Electropolishing: An electrochemical process that ultra-smooths the surface, reducing surface roughness (Ra), removing micro-burrs, and creating a high-gloss, pristine finish that prevents bacterial or chemical buildup.
Shot Blasting / Bead Blasting: Uses fine media to create a clean, uniform, non-reflective matte finish while masking minor machining lines.
Mechanical Polishing: Brushed or mirror-polished finishes tailored for architectural, food-grade, or sanitary application requirements.
We specialize in the manufacturing of precision machined custom cnc pipe fittings using a variety of materials including carbon steel, stainless steel, aluminum, and brass.
