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Help Center304 Stainless Steel Pipe, 2B Finish, 0.5mm-10mm Wall, ASTM A312 Seamless, OD 6mm-219mm, Mill Test Report
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Welcome to Hemaokang Steel (Shandong) Co., Ltd., your trusted partner for high-quality stainless steel products. Our 304 Stainless Steel Pipe, 2B Finish, ASTM A312 Seamless is engineered to deliver exceptional durability and corrosion resistance for demanding industrial applications. With a wide range of wall thicknesses (0.5mm to 10mm) and outer diameters (6mm to 219mm), this product is designed to meet precise specifications and provide reliable performance across various sectors. Backed by our ISO9001-certified quality management system, each pipe is accompanied by a Mill Test Report to ensure full traceability and compliance with ASTM A312 standards.
Our manufacturing process employs advanced seamless technology, resulting in pipes with uniform wall thickness, smooth surface finish, and excellent mechanical properties. The 2B finish offers a bright, reflective surface that is both aesthetically pleasing and easy to clean, making it ideal for sanitary and food-grade applications. Whether you need small-diameter tubes for instrumentation or large-diameter pipes for structural projects, our product range covers every requirement.
Key Features and Technical Specifications:
- Material Grade: 304 Stainless Steel (UNS S30400) – excellent corrosion resistance, good formability, and weldability.
- Surface Finish: 2B (cold rolled, heat treated, pickled, skin passed) – standard bright finish for general purpose use.
- Manufacturing Standard: ASTM A312 – covers seamless and welded austenitic stainless steel pipe for high-temperature and general corrosive service.
- Seamless Construction: No weld seams, ensuring higher strength, leak-proof integrity, and uniform wall thickness.
- Wall Thickness Range: 0.5mm – 10mm (available in schedule 5S, 10S, 40S, 80S, or custom).
- Outer Diameter Range: 6mm – 219mm (1/8 inch to 8 inch nominal).
- Mill Test Report (MTR): Provided with each shipment, showing chemical composition, mechanical properties, and dimensional checks.
- Customizable Length: Standard 6m (20 ft) or custom lengths as per request.
Detailed Parameter Table (Typical Values):
| Parameter | Value |
|---|---|
| Chemical Composition (max %) | C: 0.08, Mn: 2.00, Si: 0.75, P: 0.045, S: 0.030, Cr: 18.0-20.0, Ni: 8.0-10.5 |
| Mechanical Properties (min) | Tensile: 515 MPa, Yield: 205 MPa, Elongation: 35% |
| Surface Finish Specification | Ra ≤ 0.5 μm (typical for 2B), bright, uniform, no pits or scratches |
| Dimensional Tolerances | OD: ±0.5mm up to 50mm, ±1% for larger sizes; Wall: ±10% (per ASTM A312) |
| Pressure Rating | Varies with schedule; schedule 40S (wall ~3mm) rated for 300-500 psi at 100°C |
Advantages and Customer Benefits:
- Corrosion Resistance: 304 grade withstands oxidation and most corrosive media, reducing maintenance costs in harsh environments.
- Hygienic and Cleanable: 2B finish prevents bacterial growth, suitable for food, beverage, and pharmaceutical pipelines.
- High Strength-to-Weight Ratio: Seamless construction ensures uniform strength, lighter than carbon steel pipes for same pressure rating.
- Wide Size Range: From 6mm OD for instrumentation to 219mm for main process lines, we cover all your needs.
- Certified Quality: Every pipe is tested and comes with a Mill Test Report, giving you full confidence in material integrity.
- Customizable Services: We offer cutting, threading, polishing, and packaging options to meet your specific project requirements.
- Fast Delivery: With our strategic location in Liaocheng, Shandong, and Qingdao port, we ensure efficient logistics for global shipments.
Trust and Reliability from Hemaokang Steel (Shandong) Co., Ltd.
Since our establishment in 2025, we have rapidly grown to serve customers worldwide with an annual export value of US$50 million to US$100 million. Our team of 51-100 dedicated professionals ensures rigorous quality control at every stage, from raw material sourcing to final inspection. We are proud to be ISO9001 certified, a testament to our commitment to continuous improvement and customer satisfaction. Our main markets span across North America, South America, Europe, Africa, Oceania, and Asia, demonstrating our ability to meet diverse international standards. We ship from Qingdao Port, one of China's largest and most efficient ports, guaranteeing timely delivery. When you choose our 304 stainless steel pipe, you are not just buying a product – you are partnering with a reliable manufacturer that values transparency, quality, and long-term relationships. Contact us today for a quote or to discuss your specific requirements. Let us be your steel solution provider!
Frequently Asked Questions (FAQ)
1. What is the difference between 2B and BA finish?
2B finish is a cold-rolled, heat-treated, pickled, and skin-passed surface with a matte to bright appearance, suitable for general industrial use. BA (bright annealed) finish is brighter and mirror-like, often used for decorative or sanitary applications. Our 2B finish offers an excellent balance of brightness and cost-effectiveness.
2. Can you provide pipes with special wall thicknesses outside the 0.5mm-10mm range?
Yes, we offer customization services. For non-standard wall thicknesses, please contact our sales team with your exact requirements. Lead time and pricing will be adjusted accordingly.
3. Is the Mill Test Report included in the price?
Yes, a standard Mill Test Report (MTR) is provided free of charge with each order. It includes chemical composition, mechanical properties, and dimensional inspection results. Additional third-party inspection reports (e.g., by SGS or BV) are available upon request at extra cost.
4. What is the typical lead time for an order?
For standard sizes in stock, we can ship within 7-15 days after order confirmation. For custom sizes or large quantities, production lead time is typically 20-30 days, depending on volume. We will confirm the exact schedule upon order placement.
5. Can these pipes be used for potable water applications?
304 stainless steel is generally safe for potable water, but local regulations may require specific certifications (e.g., NSF/ANSI 61). Our pipes meet ASTM A312 material standards; please verify with your local health authority for compliance. We can also provide surface treatment options to enhance hygiene.
6. How do you ensure the pipes are free from defects like cracks or pinholes?
Each pipe undergoes hydrostatic testing, eddy current testing, or ultrasonic testing as per ASTM A312 requirements. Our quality control team visually inspects every pipe and performs dimensional checks. The Mill Test Report documents all test results for your reference.
7. What packaging options do you offer for export?
We offer standard seaworthy packaging: bundles wrapped with waterproof cloth, steel straps, and wooden pallets or crates for small diameters. For larger pipes, we use steel caps on ends and shrink wrap. Packaging can be customized to your requirements (e.g., hexagon bundles, crating).
8. Do you accept small trial orders?
Absolutely! We welcome trial orders of any quantity to allow you to evaluate our quality and service. Minimum order quantity (MOQ) for standard sizes is 1 ton or 20 pieces, but we can discuss smaller quantities for new customers. Contact us for details.
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