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 |
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.
