Please Pay attention when you buy tools,how to choose your right tools
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- Issue Time
- Feb 5,2015
There is difference price of the same thing when you are buying tools or everything.
some is very expensive but some is very cheap.how to choose?why?let's pick our auto tools for example.
The material,The hardness,The surface treatment is the main dates to decided the price.
In Chinese Market, A3 steel,45#, 40cr is the main material.
GB JIS ASTM DIN
A3 Q235 SS41 A283-C 17100
45# 45# S45C SAE 1045 C45
40cr 40CR SCr440 SAE 5140 41CR4
Report:
A3 
45# 
40CR 
SO,The price from cheap to expensive is A3 <45#<40cr
meanwhile,The heat treatment is another factor.
Many auto tool must to do heavy duty work.many good tools and need do heavy duty tool are made heat treatment.
After heat treatment,The hardness(HRC) From low to high is A3<45#<40CR.
A3 can't heat treatment,So if the tool is very cheap, maybe the material is A3 and there is no HRC hardness. The 45# usual can reach 35-45（HRC），40CR usual can arrive 40-55(HRC)，but 38-42(HRC) is the best hardness for the auto tools.so our auto tools usually control in range.
Last,The surface treatment also decide the price.In the Chrome plated,black oxide coating,electrophoretic paint,zinc plating,phosphorization,Chrome plated is more expensive than others.
In DNT Tools,all tool choose 45# or 40CR,all heavy duty tools hardness(HRC) is 38-42. If you are looking for good tool,wish DNT Tools will be your good choose.
except the material and hardness,the Technic(forge drop or casting) also is the key about good tool or not.In the future,It's going to introduce in FAQ.
Thanks for your read.