Product Specification

ASTM A240 Cold Rolled Stainless Steel Sheet Plate 316L Grade

ASTM A240 | 0.3mm–6.0mm Thickness | 1000–2000mm Width | Mill Edge / Slit Edge

1. Product Description

ASTM A240 cold rolled stainless steel sheet plate in 316L grade is a precision flat-rolled product manufactured to the ASTM A240 standard, which covers chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications. The 316L grade is an austenitic stainless steel containing 16–18% chromium, 10–14% nickel, and 2–3% molybdenum, with a maximum carbon content of 0.03%.

The molybdenum addition is the key differentiator between 316L and standard 304. Molybdenum significantly improves resistance to pitting and crevice corrosion, particularly in chloride-bearing environments such as seawater, de-icing salts, and chemical processing streams. The low carbon content of 316L prevents carbide precipitation at grain boundaries during welding, which would otherwise deplete chromium and cause intergranular corrosion. This means 316L can be welded in thick sections without subsequent annealing in most service conditions.

The cold rolled process produces tighter thickness tolerances, superior surface finish, and higher strength compared to hot rolled material. Sheet plate in this grade is typically supplied in 2B finish — a smooth, matte-gray surface achieved through annealing, pickling, and skin-pass rolling. The 2B finish is easy to clean, non-reflective, and serves as an excellent substrate for further processing such as polishing, passivation, or coating.

2. Key Parameters

3. Applications

316L sheet plate is specified for chemical process vessels, heat exchangers, storage tanks, and piping components where chloride exposure is a concern. Other applications include marine equipment, pharmaceutical processing equipment, food production machinery, and architectural components in coastal environments. The grade is also widely used in medical devices and surgical instruments due to its biocompatibility and corrosion resistance.

4. Product Advantages

• Chloride Resistance: Molybdenum content provides superior pitting resistance compared to 304

• Weldability: Low carbon content eliminates sensitization in most welded assemblies

• Surface Quality: Cold rolled 2B finish offers uniform appearance and excellent flatness

• Hygienic: Non-porous surface resists bacterial adhesion, suitable for sanitary service

• High-Temperature Strength: Maintains mechanical properties at elevated temperatures

5. Product Functions

• Containment of corrosive fluids in process industries

• Heat transfer surfaces in thermal equipment

• Structural support in corrosive atmospheres

• Base material for fabricated components requiring subsequent forming or welding

6. Usage Instructions

1. Cutting: Use plasma, laser, or waterjet. Avoid carbon steel tooling contact.

2. Forming: Cold bending acceptable; account for springback on thickness >3mm.

3. Welding: Use 316L filler metal. Clean weld area before and after welding.

4. Passivation: After fabrication, passivate cut edges and welds to restore passive layer.

7. Precautions

• Do NOT use carbon steel brushes or grinding wheels — contamination causes rust spots.

• Avoid prolonged contact with strong acids (HCl, H₂SO₄).

• Store indoors, keep surface dry, avoid moisture during storage.

• Handle with clean gloves to prevent fingerprints and oil marks.

8. Shipping

• Lead Time: 15–30 days after deposit

• Port: Shanghai, Qingdao, or as requested

• Shipping Terms: FOB, CIF, CFR

• Container Loading: 20GP / 40GP / 40HQ

9. Payment Terms

• T/T: 30% deposit, 70% balance against B/L copy

• L/C at sight: Acceptable for established customers

10. Packaging

All wood packaging complies with ISPM 15 fumigation requirements with IPPC mark.

11. Return & Refund Policy

• Claims for wrong grade, size, or transit damage must be reported within 7 days of delivery.

• Returns accepted only for unused, original-condition material.

• Photographic evidence required for all damage claims.

• Replacement or refund processed within 7–10 working days after verification.

• Custom-cut material is non-returnable unless defective.

Mill Test Certificates (EN 10204 3.1) available upon request. Third-party inspection (SGS, BV) can be arranged.