Can I reinforce Bazlye’s comments by listing what makes a bad anvil? Avoid materials that:
- ring like a bell
- shatter
- spall (dangerous to the eyes)
- dent
- are too light (shouldn’t bounce about!)
Fairly obvious why anvils aren’t made of light, soft Aluminium or heavy soft Lead. Other metals have pros and cons. Cast-iron doesn’t ring, but it might shatter. Cast-steel won’t shatter and resists denting, but it rings, partly reduced by mounting on a heavy oak block. Alloy steels make better anvils than the Carbon Steels because they’re tougher but are more expensive. Traditional top-quality wrought-iron works well, but is all but unobtainium now.
New high-end anvils are expensive, I suspect because they’re composites, such as a tough alloy steel surface bonded to a cast-iron base. Cheap anvils come with disadvantages: don’t hit them too hard!
Old railway line is good for small work. Made of extra tough Manganese Steel.
Don’t assume old anvils are better than modern ones. “Too cheap” has always been a problem! Ordinary wrought-iron contained too many impurities to make a good anvil; the best were made of much more expensive triple wrought metal. Buyer beware, even though time tends to filter out the rubbish.
Dave