As a professional precision pipe fitting supplier, Xinghe provides certified stainless steel raw materials—ranging from cost-effective SS201, free-machining SS303, to high-corrosion-resistant SS304, SS304L, SS316, and SS316L—machined via tight-tolerance multi-axis CNC turning. To maximize component lifespan and corrosion performance, we offer industry-standard surface treatments, including chemical passivation (ASTM A967), electropolishing, and ultrasonic cleaning, ensuring leak-free sealing and pristine surface integrity for industrial fluid systems
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. |
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.
