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That's not a test for any particular alloy at all, only a rough guide to two metals' relative hardnesses.
Mild-steel cannot be hardened through, only case-hardened to give a thin, wear-resistant surface layer. Heat-treatable steels can be hardened through but hardness alone merely tells you it has been hardened, and may simply be high-carbon steel (Iron plus a small amount of carbon).
If you know the metal in a particular machine can only be either untreated mild-steel or Chromoloy, then hardness will differentiate them; but if you don't know what alloys have been used, it tells you only which components have been hardened, and could be any of two or more such alloys in the machine.
As for using a file as a hardness-tester.... Not with any file belonging to me or anyone else who respects their tools, you don't!
Wiki User
∙ 7y ago
Wiki User
∙ 16y agoWhen I raced Motocross we used to check with a file, Chromoly is a tempered steel and the file would rub over it with very little shavings as oppose to mild steel,it would be like sliding your foot on dirt, (mild steel) and sliding your foot on ice, (chromoly). Answer Not sure but the the link below may help.
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What is the chemical equation for chromoly steel?
Steel hasn't a chemical equation.
Is aluminium as strong as steel?
It depends on multiple factors, There are multiple grades/alloys of both that have different characteristics ( flexibility, temperature ranges, chemical resistance that affect it's strength). If you are going by volume, comparing pieces of the same width/length/thickness, than steel is always stronger. If your comparing by weight, comparing 2 pieces that weight the same, than aluminum is almost always stronger with the exception of chromoly steel. 41xx grade chromoly steel is the only steel that is stronger/weight than aluminum alloys(debatable), but most agree that the aluminum of similar weight will be stiffer. Aluminum alloys usually show a 1/3 weight saving with equal strength vs. non Chromoly steels, like that used in production cars. All commercial planes are made of aluminum alloy.
Does a velocity graph tell you where to start?
No. It will tell you WHEN but not where.
What are positive and negative ways the humans have imapct the taiga?
tell me tell me tell me yowont us to ask yall anything
How do you tell how old a terrapin is?
I don't know tell me I'm begging you!
What is stronger 7075 aluminum or 4130 chromoly?
Chromoly is stronger in terms of tensile strength and both metals are about the same in yield or bending strength.
What is it used chromoly in daily life?
chromoly is used in are daily life by riding bikes in a bike we also use it in cars so it could look shiny. its used in bikes cars
What type of steel is used in suspension of an race car?
4130 chromoly
How thick is chromoly bicycle frames?
Wall thickness is about one mm.
What is the chemical equation for chromoly steel?
Steel hasn't a chemical equation.
How much do the Stolen Tallboy chromoly bars with 8.65 rise weigh?
like 36 to 38 oz
How can I tell what type of BMX bike frames I have?
Generally speaking aluminum frames have larger diameter tubes than steel or titanium bikes, but the most obvious is to test with a magnet. If it sticks it's a steel frame. If it doesn't it's probably aluminum. Titanium frames are still so rare that you are very unlikely to buy one w/o knowing.
Weight of a 2004 specialized fuse 2?
If it is the chromoly framed bike,complete, weight is right around 30lbs.newtest3
Can you chrome chromoly?
People do it all the time, but you have to bake the metal to release the hydrogen after you do it. Otherwise the steel gets brittle.
Which is the better bmx Im ordering one today and need to know which bmx is the best please reply Which is better wethepeople arcade 2012 premium subway 2012 or United Limited Edition redbull?
The premium is the best value as it has chromoly parts and a part chromoly frame. it also is the best on looks i think.
What is the function of Chromoly?
Chromoly (often spelled cromoly) is an abbreviation for "chromium-molybdenum steel". Chromoly is an alloy used to produce tubing for bicycle frames and race-car roll cages. It is not as lightweight as some steel alloys, but has the advantages of high tensile strength and malleability. It is also easily welded and is considerably stronger and more durable than standard (1020) steel tubing. It is also known as 4130 steel, and is composed of 0.28 to 0.33% carbon, 0.4 to 0.6% manganese, 0.8 to 1.1% chromium, 0.15 to 0.25% molybdenum, 0.04% phosphorus, 0.04% sulfur, and 0.2 to 0.35% silicon, in addition to iron. Retrieved from the link on the right
What should a freestyle bmx be made out of?
I think a freestyle bmx should be made out of steel but I've heard bmx's are made out of chromoly or alluminion, i hope that's just for racing
