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Stainless Steel Coil | Industrial-Grade Tubing Solutions
Stainless Steel Coil | Industrial-Grade Tubing Solutions
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Stainless Steel Coil Product Details
Specifications & Properties
| Parameter | Details |
|---|---|
| Material Grades | 304, 316L, 430, 410, 201, 2205 (Duplex), 310S, 321 |
| Thickness Range | 0.1–6.0 mm (Cold Rolled: 0.1–3.0 mm; Hot Rolled: 1.5–6.0 mm) |
| Width | 10–1550 mm (Standard) / Customizable up to 2000 mm |
| Surface Finish | 2B, BA, No.1, No.4, HL (Hairline), Mirror, Annealed, Pickled |
| Hardness (HV) | Austenitic: 150–200 HV |
| Tolerance | ±0.01 mm (Thickness) / ±0.2 mm (Width) |
| Density | 7.93 g/cm³ (304/316) / 7.75 g/cm³ (430/410) |
| Processing | Cold Rolling, Hot Rolling, Precision Slitting, Annealing, Tempering |
Mechanical & Functional Properties
Tensile Strength
stainless steel coil tubing and other products exhibit tensile strengths ranging from 515–1035 MPa, depending on the grade and processing method. For example:
- Austenitic Grades (304/316L): 515–620 MPa (Annealed) / 860–1035 MPa (Full Hard)
- Martensitic Grades (410/420): 760–827 MPa (Tempered)
- Ferritic Grades (430): 450–550 MPa (Cold Rolled)
Cold-rolled stainless steel coil nails achieve higher strength due to work hardening, making them ideal for construction and industrial fastening.
Bending Strength
Bending strength correlates with yield strength and ductility. Austenitic grades (e.g., 301) offer 205–310 MPa yield strength, enabling deep drawing and complex forming without cracking. Precision slitting ensures edge uniformity for stainless steel coiled pipe used in high-pressure fluid transport.
Identification & Marking
Stainless steel coils are marked per international standards:
- ASTM/ASME: Laser-engraved grade designation (e.g., "304"), heat number, and manufacturer’s logo.
- ISO/DIN: Material numbers (e.g., 1.4301 for 304) and dimensional tolerances.
Certifications include Mill Test Reports (MTRs) with chemical composition and mechanical data.
Weight Calculation
Weight (kg/m²) = Thickness (mm) × Width (mm) × Length (m) × Density (g/cm³) / 1,000
Example: A 1.5 mm × 1000 mm × 1 m stainless steel coil (Grade 304) weighs:
1.5 × 1000 × 1 × 7.93 / 1,000 = 11.895 kg/m².
For coils, total weight = kg/m² × coil length (m).
Why Does Stainless Steel Rust?
While stainless steel coiled pipe is corrosion-resistant, rust can occur under specific conditions:
- Chloride Exposure: Chlorides (e.g., seawater, de-icing salts) disrupt the passive chromium oxide layer, leading to pitting corrosion.
- Mechanical Damage: Scratches or abrasions expose raw steel to oxidation.
- Low Chromium Content: Grades with <10.5% chromium (e.g., 430) lack sufficient corrosion resistance.
- Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) in electrolytes accelerates rusting.
- High-Temperature Oxidation: Prolonged exposure above 400°C degrades protective layers in non-stabilized grades (e.g., 304 vs. 321).
Regular cleaning with pH-neutral solutions and avoiding abrasive tools mitigates these risks.
Why Choose Our Stainless Steel Coils?
- Material Diversity: Over 20 grades, including super duplex (2507), precipitation-hardening (17-4PH), and high-temperature alloys (310S).
- Precision Manufacturing: CNC-controlled cold rolling ensures ±0.01 mm tolerance for aerospace and medical applications.
- Global Certifications: ASTM A240, A666, EN 10088-2, and PED 2014/68/EU compliance.
- Custom Solutions: Tailored surface finishes (e.g., No.4 for architectural use), custom widths, and heat treatment (annealed, tempered).
- Quality Assurance: Third-party testing for hardness (Rockwell/Vickers), corrosion resistance (ASTM G48), and intergranular corrosion.
