Kegs used in the brewing industry are typically made from stainless steel rather than aluminum. Stainless steel is the preferred material for kegs due to its durability, corrosion resistance, and ease of maintenance.
Stainless steel kegs are commonly made from two types of stainless steel: 304 and 316. These grades of stainless steel are known for their excellent corrosion resistance properties, even in the presence of acidic beverages such as beer. They are also highly resistant to rust, which is crucial for maintaining the quality and integrity of the beer.
304 stainless steel is the most commonly used grade for kegs. It is a versatile and cost-effective option that provides good resistance to corrosion and is easy to weld. It is suitable for most brewing applications and can withstand the rigors of the brewing process.
316 stainless steel is a higher-grade material that offers even greater corrosion resistance than 304 stainless steel. It contains additional elements such as molybdenum, which enhances its resistance to chloride corrosion. This makes it particularly suitable for use in coastal areas or in brewing environments where the beer comes into contact with high levels of chlorine or other corrosive agents.
In my personal experience as a brewer, I have found that kegs made from stainless steel are highly reliable and long-lasting. They can withstand the daily wear and tear of a busy brewery, including frequent cleaning and sanitization processes. Stainless steel kegs are also easy to maintain and sanitize, which is crucial for ensuring the quality and safety of the beer.
It is important to note that while stainless steel is the preferred material for kegs, there are some kegs made from aluminum as well. Aluminum kegs are lightweight and can be more cost-effective compared to stainless steel kegs. However, aluminum is not as durable as stainless steel and may be more prone to denting or damage. Additionally, aluminum can react with certain acidic beers, potentially affecting the taste and quality of the beer.
Kegs used in the brewing industry are predominantly made from stainless steel, with 304 and 316 being the most common grades. Stainless steel kegs offer excellent corrosion resistance, durability, and ease of maintenance. While there are some aluminum kegs available, stainless steel is generally preferred due to its superior properties for brewing applications.