Shot peening is a highly effective surface treatment process used to improve the strength, durability, and fatigue resistance of metal components. At Sandwell UK, we provide professional shot peening services to a wide range of industries requiring reliable, high-performance parts.
This guide explains what shot peening is, how it works, and the key advantages it offers for safety-critical and high-stress applications.
If you would like more information or want to discuss your application, contact our team today.
Shot peening is a cold working process that strengthens metal by introducing compressive residual stress at the surface of a component.
Traditionally, peening involved striking metal with a hammer to improve durability (a technique used by blacksmiths for centuries). Shot peening applies the same principle using controlled streams of small metallic, ceramic or glass shots, propelled at high velocity onto the component surface.
During manufacturing processes such as forging, machining, or welding, metal components often develop residual tensile stresses. These stresses can reduce fatigue strength and increase the likelihood of cracking. Shot peening counteracts these effects by redistributing stress, significantly improving fatigue resistance and structural integrity.
Shot peening is widely used across multiple industries due to its proven mechanical and performance benefits.
1. Reduced Fatigue Stress and Failure – Manufactured components often contain localised weak points caused by forming, machining, or welding operations. These areas are particularly vulnerable to cyclic loading and fatigue failure. Shot peening strengthens the surface layer, helping to prevent crack initiation and extending fatigue life.
2. Improved Component Strength – By inducing compressive stress, shot peening increases resistance to cracking and wear. This results in stronger components capable of performing reliably in demanding environments.
3. Increased Product Life – Components treated with shot peening typically achieve a longer service life compared to untreated parts. Improved durability reduces maintenance requirements, lowers replacement costs, and minimises material waste.
Additional Advantages of Shot Peening:
Shot peening is commonly used in industries where metal fatigue resistance, safety, and long-term reliability are critical. These include automotive, aerospace, medical, and general manufacturing sectors.
Typical components treated with shot peening include but are not limited to:
Because these components operate under high loads or cyclic stress, shot peening is often essential to meeting performance and safety requirements.
At Sandwell UK, we operate advanced robotic and multi-axis shot peening systems, allowing precise control, excellent repeatability, and consistent process quality across complex components.
We are Nadcap accredited and hold AS9100 quality approval, ensuring all shot peening services meet the highest aerospace and manufacturing standards.
If you would like to discuss your application or learn more about our shot peening capabilities, contact the Sandwell team today.
Call us on +44 (0) 1327 350205, send an email to sales@sandwell-uk.com, or leave your details here: