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Help CenterCold Drawn & Bright Polished Stainless Steel Bar Square Flat Hex Round ASTM AISI 304/316/309/310
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As a leading manufacturer based in Wuxi, Jiangsu, China, Wuxi Yansheng Technology Co., Ltd. specializes in high-quality stainless steel bar products. Our Cold Drawn & Bright Polished Stainless Steel Bar in square, flat, hex, and round shapes is crafted from premium materials including ASTM AISI 304, 316, 309, 310, and other grades. This product line represents our commitment to precision, durability, and superior surface finish, making it ideal for demanding industrial applications.
Cold drawing and bright polishing processes enhance the mechanical properties and surface quality of the stainless steel bars, resulting in excellent dimensional accuracy, smooth surface, and improved corrosion resistance. Whether you need bars for shaft manufacturing, structural components, or decorative purposes, our product delivers consistent performance and reliability.
Key Features & Advantages
Superior Surface Finish: Bright polished surface with Ra ≤ 0.4μm, providing aesthetic appeal and easy cleaning.
Precise Dimensional Control: Cold drawn process ensures tight tolerances (H8/H9), reducing waste in machining operations.
Enhanced Mechanical Strength: Cold working increases yield strength and hardness, suitable for high-stress applications.
Excellent Corrosion Resistance: Available in austenitic grades (304, 316, 309, 310) for aggressive environments.
Versatile Shapes: Square, flat, hex, and round profiles to meet diverse design requirements.
Customizable Sizes: Diameter/side length from 5mm to 500mm, length from 1m to 12m, or as per customer specifications.
Wide Application Range: Used in machinery parts, automotive components, construction, petrochemical equipment, food processing, and more.
Technical Specifications (Typical)
| Parameter | Value |
|---|---|
| Material Grade | 304, 304L, 316, 316L, 309, 310S, 321, 410, 430 (custom) |
| Surface Roughness (Ra) | ≤ 0.4 μm (polished) |
| Tolerance Grade | H8, H9, H10 (as per ASTM A484) |
| Straightness | ≤ 1mm/m |
| Tensile Strength (304) | ≥ 515 MPa |
| Yield Strength (304) | ≥ 205 MPa |
| Hardness (304) | ≤ 90 HRB |
The cold drawn and bright polished process not only improves the surface finish but also refines the grain structure, leading to better fatigue resistance and machinability. Our bars are supplied in mill lengths or cut-to-length, with various packaging options available (bundles, wooden cases, or as requested).
Why Choose Wuxi Yansheng Technology?
With over 7 years of experience since 2017, we have grown into a trusted manufacturer with a factory size of 1,000–3,000 square meters and a dedicated team of 101–200 employees. Our annual export value exceeds US$50 million, serving markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. We ship from major ports including Tianjin, Shanghai, Qingdao, and Ningbo, ensuring timely delivery worldwide.
We hold multiple certifications such as ISO9001, ISO14000, OHSAS18001, SA8000, HACCP, and others, reflecting our commitment to quality management, environmental responsibility, and occupational health & safety. Each batch of our stainless steel bars undergoes rigorous testing for chemical composition, mechanical properties, and dimensional accuracy.
Whether you need standard sizes or custom dimensions, our team provides responsive technical support and flexible solutions. Contact us today to discuss your requirements and experience the reliability of our Cold Drawn & Bright Polished Stainless Steel Bars.
Frequently Asked Questions (FAQ)
Q1: What is the difference between cold drawn and hot rolled stainless steel bars?
A: Cold drawn bars have tighter dimensional tolerances, a smoother surface finish, and higher strength due to work hardening. They are ideal for precision applications where hot rolled bars may not meet surface or tolerance requirements.
Q2: Can you supply bars in grades other than 304/316/309/310?
A: Yes, we can also produce in 321, 410, 430, 201, 202, and other austenitic, ferritic, or martensitic grades upon request. Please specify your required grade and standards.
Q3: What is the typical lead time for an order?
A: For standard sizes and quantities, lead time is usually 15–25 working days. Custom orders may require 30–40 working days depending on complexity. We strive to meet urgent schedules whenever possible.
Q4: How do you ensure the quality of the bars?
A: Each bar is inspected for chemical composition (spectrometer), mechanical properties (tensile test), dimensional accuracy (micrometer), and surface finish. We provide mill test certificates with every shipment.
Q5: Do you offer cutting or machining services?
A: Yes, we can cut bars to exact lengths, chamfer ends, or provide other secondary processing. Please contact our sales team with your specific requirements.
Q6: What packaging options are available for export?
A: Standard packaging includes bundles with steel straps, waterproof wrapping, and wooden crates for fragile or high-value orders. We also customize packaging per customer instructions.
Q7: Can you provide samples before bulk order?
A: Yes, we offer samples (typically 100-200mm length) for evaluation. Shipping cost is at the customer's account. Bulk order discounts are available after sample approval.
Q8: What are the main application industries for these bars?
A: They are widely used in automotive shafts, hydraulic cylinders, food processing equipment, chemical containers, architectural structures, marine hardware, and general engineering components.
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