Sihe Steel
Sihe Steel
Direct factory sourcing of premium grade 202, 317L, and high alloy seamless coiled tubes for harsh industrial environments.
Within the spectrum of structural materials, Grade 202 Stainless Steel occupies a critical strategic position. Classifed as an austenitic chromium-nickel-manganese alloy under international standards like ASTM, JIS, and DIN, it is designed to optimize costs by partially substituting manganese and nitrogen for premium-grade nickel. This chemical configuration grants the alloy excellent toughness at low temperatures, high tensile properties, and moderate corrosion resistance in milder atmospheric and chemical environments.
Unlike traditional 300 series alloys (such as 304 and 316), the mechanical deformation characteristics of grade 202 make it highly responsive to precision drawing. The cold-worked precision pipe form achieves a far superior yield strength compared to standard structural steels, making it a favorite for architectural structural frameworks, precision automotive parts, fluid lines, and light industrial equipment.
SEO Growth Director Insight: For structural and precision applications that demand mechanical reliability without the extreme chemical profile of Marine-Grade 316, 202 precision tubing offers a high performance-to-cost ratio. Overlooking this manganese-austenitic class often leads to over-engineering and unnecessary capital expenditures.
Understanding the precise elemental makeup is critical for engineering decisions. The table below represents the metallurgical differences between Grade 202 and standard austenitic and duplex alloys, demonstrating the chemical reasons for its mechanical strength.
| Steel Grade | Chromium (Cr)% | Nickel (Ni)% | Manganese (Mn)% | Nitrogen (N)% | Tensile Strength (MPa) | Yield Strength (0.2% Offset, MPa) |
|---|---|---|---|---|---|---|
| Grade 202 | 17.0 - 19.0 | 4.0 - 6.0 | 7.5 - 10.0 | ≤ 0.25 | ≥ 515 | ≥ 275 |
| Grade 304 | 18.0 - 20.0 | 8.0 - 10.5 | ≤ 2.0 | ≤ 0.10 | ≥ 515 | ≥ 205 |
| Grade 316L | 16.0 - 18.0 | 10.0 - 14.0 | ≤ 2.0 | ≤ 0.10 | ≥ 485 | ≥ 170 |
| Duplex 2205 | 22.0 - 23.0 | 4.5 - 6.5 | ≤ 2.0 | 0.14 - 0.20 | ≥ 655 | ≥ 450 |
Established as a key benchmark exporter, Liaocheng sihe stainless steel material LTD runs six advanced production lines dedicated to structural sheets, precise capillaries, and heat exchanger pipes. The factory utilizes modern offline and online thermal treatment mechanisms, introducing the world’s leading bright annealing technology.
Our manufacturing processes follow strict protocols designed to reduce outer and inner surface defects, maintain consistent microstructures, and achieve tight tolerances (up to ±0.02mm for specialty items). In addition to conventional forming, our processing capabilities cover complex operations required by international EPC projects:
Supports manufacturing of seamless coiled tubing lengths up to 32,800 feet (10,000 meters) for umbilical lines.
Online inert gas atmosphere treatment. Eliminates pickling acid steps, leaving a mirror-polished surface finish.
Ensures that the tube joint interfaces resist cracking under dynamic hydraulic loading and structural stresses.
100% pneumatic air tightness testing, structural elongation profiling, and dimensional verification.
The specialized chemistry of Grade 202 precision tubing makes it highly suitable for structural and light fluids applications across various major industries:
From heavy oil extractions to aerospace hydraulic parts, our materials are built to meet rigorous industrial standards.
When sourcing 202 Stainless steel precision pipes globally, procurement teams face two main challenges: ensuring material composition compliance and managing volatility in alloy surcharges. The price of Grade 202 is heavily influenced by international Manganese and Chromium indices, which fluctuate less than Nickel prices. This makes Grade 202 a more price-stable option during volatile market conditions.
By working directly with Chinese manufacturers, buyers can benefit from lower conversion costs. Large-scale mills like Liaocheng Sihe integrate drawing and bright annealing in a single continuous process. This setup reduces production waste and handling, resulting in cost savings that are passed on to international customers.
Take a look inside our manufacturing facility in Shandong, China, and view our international quality compliance certificates.
Get detailed answers about our manufacturing standards, pricing policies, logistics, and material properties.
Our prices are subject to change depending on alloy raw material costs (Chromium, Manganese, Nickel) and other market factors. We will send you an updated price list after your company contacts us with specific size, thickness, and volume requirements.
Yes, we require all international orders to have an ongoing minimum order quantity. For customized precision capillary dimensions, the standard production run MOQ is typically 500 kilograms. Please check with our sales desk if your order requires small-volume trial phases.
Yes, we provide comprehensive certification including Mill Test Certificates (MTC) to EN 10204 3.1, Certificates of Analysis (CoA), Third-Party Testing Reports (SGS, TUV), Export Customs Declarations, Certificate of Origin (Form E or CO), and Shipping Insurance documents.
For standard stock sizes and samples, the lead time is approximately 7 days. For large-scale production and customized coils, the average lead time is 20-30 days after receiving your deposit and design approval. We will work to accommodate your schedule requirements.
Our standard payment terms are a 30% advance deposit via Telegraphic Transfer (T/T), with the remaining 70% balance settled against the copy of the Bill of Lading (B/L). We also accept Letter of Credit (L/C) at sight for large accounts.
We guarantee our materials conform to the requested standards (ASTM, DIN, JIS). Our warranty covers structural defects and cracking under normal operating conditions. If any material fails to meet the specified standards, we will arrange replacements or refunds.
Yes, we use high-quality packaging for sea freight. Coils are packed in sturdy wooden crates or reinforced metal spools wrapped in heavy plastic film. Straight precision pipes are packed in individual sleeves inside wooden boxes to prevent surface damage during transit.
Shipping fees depend on the chosen delivery method (FOB, CIF, CFR) and transport mode. Ocean freight is generally the most economical choice for large orders, while air freight is available for urgent small samples. We will calculate shipping rates based on order volume and weight.
Due to its lower nickel content, Grade 202 is less corrosion-resistant than Grade 304 in highly acidic or marine chloride environments. However, in milder atmospheric and non-saline conditions, it provides similar performance with higher mechanical yield strength, making it a cost-effective alternative for structural applications.
Our online bright annealing process treats the tubes in a hydrogen-atmosphere furnace at temperatures up to 1040°C, followed by rapid cooling. This process prevents oxidation, keeping the metal bright and clean. It also relieves internal stresses from cold-drawing, improving the tube's ductility and corrosion resistance.
Explore our complete range of precision stainless steel items, including coiled tubes, capillaries, heat exchangers, and flat sheets.
Duplex 2205 and 202 stainless steel coiled tubing options, designed for high-pressure control lines.
Capillary tubes in 1/2" diameter and custom micro-sizes, suitable for precision measurement systems.
High-temperature oxidation resistant stainless steel tubes, suitable for furnace piping and heat exchangers.
Browse our collection of high-performance capillary tubes, heat exchanger pipes, and chemical-grade sheets.
