Tin Mill Products, Electrolytic Tin Plate, Single Reduced

A624/A624M-13: Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Single Reduced

For engineers and manufacturers involved in packaging and metal fabrication, understanding the precise material specifications for tin mill products is paramount. The ASTM A624/A624M-13 standard provides an essential framework for ensuring the quality and performance of single-reduced electrolytic tin plate, a critical material in numerous industrial applications. This comprehensive standard ensures consistency and reliability in the production of everyday packaging and beyond.

What is A624/A624M-13?

ASTM A624/A624M-13 is an authoritative standard that defines the requirements for single-reduced electrolytic tin plate. Originating from ASTM International, this specification outlines the properties, dimensions, and quality controls for this material, which is produced from low-carbon steel. Its primary purpose is to ensure that the tin plate meets the stringent demands of manufacturers, particularly for applications like food and beverage cans, closures, and crowns.

Scope & Purpose

This industry-leading standard governs the production and supply of single-reduced electrolytic tin plate, furnished in both coils and cut sizes. It specifies requirements for tin coating weights, surface finishes, chemical treatments, and oiling. The standard is applicable to materials intended for the manufacture of cans, closures, crowns, and other metal products. It outlines distinct requirements for inch-pound (A624) and SI (A624M) units, ensuring global applicability, but does not cover all safety aspects, which remain the user's responsibility.

Who Must Comply?

• • Primary audience: Metallurgical Engineers, Materials Engineers, Quality Control Inspectors, Production Managers, and Manufacturing Engineers.
• • Industries affected: Food and Beverage Packaging, Metal Packaging, Steel Manufacturing, and General Manufacturing.
• • Compliance nature: Voluntary, but often mandated by customer specifications and supply chain requirements.
• • Enforcement: Typically by end-users through quality control checks and incoming material inspection, as well as by producers to meet market expectations.

Key Requirements Overview

The standard requires manufacturers to adhere to specific criteria for single-reduced electrolytic tin plate. Key provisions include:

• • Material Composition: Ensuring the base steel is low-carbon and cold-reduced, as detailed in complementary general requirements specifications.
• • Tin Coating Weights: Specifying the acceptable tin coating weights [masses], including options for differentially coated plates, with defined testing procedures.
• • Dimensional Tolerances: Outlining precise thickness, width, and length requirements for both coil and cut sizes, ensuring suitability for automated manufacturing processes.
• • Surface and Finish: Defining acceptable surface appearances and finishes, along with requirements for chemical treatments and oiling to prevent corrosion and aid fabrication.
• • Testing and Verification: Establishing standardized methods for testing tin coating weights and other critical properties to ensure conformance.

Related Standards & References

ASTM A624/A624M-13 is intrinsically linked with other ASTM standards for comprehensive material control. It references ASTM A623/A623M (General Requirements for Tin Mill Products), which provides overarching specifications for steel type, temper, and other fundamental properties. For accurate material assessment, **ASTM A630 (