Verified by Mel Sykes, Industrial Supply Chain Specialist - May 2026
How Does Hydrogen Resistance of Austenitic Stainless Steels and the Influence of Nickel Equivalent on Properties Impact Engineering Components in the UK?
Hydrogen resistance of austenitic stainless steels is important for components used in industries where hydrogen exposure can cause embrittlement. Hydrogen resistance of austenitic stainless steels and the influence of the nickel equivalent on properties The nickel equivalent in these steels significantly influences their performance against hydrogen, affecting both durability and cost.
Tim Wallbaum from DMV GmbH recently discussed how the chemical composition of smooth stainless steel tubes impacts their ability to resist hydrogen-induced damage. This insight is particularly relevant for UK engineers who rely on materials like A2-70 austenitic stainless steel and EN8 carbon steel in valve manufacturing and other critical applications.
Why Is Hydrogen Resistance Important for Austenitic Stainless Steels?
Hydrogen resistance is vital because exposure to hydrogen can cause embrittlement, a condition that weakens material integrity. For UK engineers, this means selecting materials with high nickel content, which enhances durability against hydrogen damage. According to Wallbaum's research, increasing the nickel equivalent improves resistance and prolongs component life.
How Does Nickel Content Affect Material Cost?
Higher nickel equivalents increase costs due to the higher raw material prices. However, the enhanced durability can lead to lower maintenance expenses over time. For instance, a study by BPMA found that components with 12% nickel content were less likely to require replacement within five years compared to those with only 8%.
What Are the Practical Implications for UK Procurement Managers?
Procurement managers must balance material costs and long-term durability when selecting austenitic stainless steels. Components like valves, flanges, and pipes listed on MLC's directory can benefit from higher nickel equivalents for better hydrogen resistance. This choice may initially cost more but reduces overall expenditure by preventing frequent replacements.
Which UK Standards Should Engineers Follow?
Engineers should adhere to British standards such as BS EN 10216-7 for smooth tubes, which specify the chemical composition and mechanical properties required for hydrogen-resistant applications. DIN and ISO equivalents also offer guidance on material specifications that enhance durability against hydrogen damage.
How Can Component Suppliers Adapt Their Offerings?
Suppliers can cater to this demand by offering a range of austenitic stainless steels with varying nickel contents. Highlighting the benefits of higher nickel equivalents in product descriptions will appeal to UK engineers seeking strong materials for high-stress environments. For example, MLC's directory includes suppliers who provide A2-70 and EN8 grades that meet these stringent requirements.
What Are Some Real-World Examples?
Real-world examples include offshore oil platforms where hydrogen exposure is common due to corrosion protection measures. At Hydrogen resistance of austenitic stainless steels and the influence of the nickel equivalent on properties, here, engineers prefer materials like A2-70 stainless steel with higher nickel content for their valves and pipes because of its superior resistance against hydrogen-induced cracking.
Conclusion
Understanding the impact of nickel equivalent on the hydrogen resistance of austenitic stainless steels helps UK engineers make informed decisions about material selection. By focusing on durability rather than initial cost, they can reduce maintenance expenses over time. Suppliers who cater to this need will see increased demand for their products in critical applications where reliability is important.
For more information and a wider range of materials, visit MLC's directory at mlc.org.uk.