Just the opposite Barry. The cryogentic treatment of valve springs is one of the more important things done in as far as I know every NASCAR engine, Formula 1 engines, etc....a broken valve spring is one of the most common failures that happens to a high performance engine, and the cryo treatment reduces the chances of that failure CONSIDERABLY. And yes, all my engines steel parts have been "cryo'ed"....includes 10mm head bolts as well as valve springs, valves, and all rotating parts. Many racers will also cryo the entire engine block....it is not very expensive and it "normalizes" stress built into parts.....
Expert cryogenic treatment of metals and alloys to improve
strength, performance and wear properties
"Cryogenic, or super chilling of most metals and alloys and some plastics, reduces wear and stress to a far greater extent than untreated metals"
The benefits to you include:
Longer wearing components - generally extends life of tools and parts by 200% or more
Extended product life,
Less downtime on maintenance and change-over
Increased durability
Decrease wear
Reduce stress
Reduced distortion
Enhanced performance
Reduced heat retention
Increased horsepower
Treated items will exhibit life increase leading to dollar savings
Process can be applied to items that are new/used or sharp/ dull: remanufacturing or resharpening and best of all, sharpening or redressing worn tools will not destroy treatment effects
What metals can be cryogenically treated?
Any ferrous or non-ferrous metals
Cast iron
Aluminum
Alloys
Typical items that can be treated include:
Machine tool bits including end mills, saws and drills, industrial tooling, cutting blades for profiling etc
Virtually all engine components including heads, blocks, camshafts, crankshafts, rods and valve springs
Drive chain components including gearboxes and axles
Brake drums and rotors
Firearm barrels and actions
Golf clubs