Steel brackets are being cold bended
Steel brackets are being cold bended
(OP)
To All,
We purchase our products from steel supplier in a Asian country. One of the products we are buying is 105 degree angle bended brackets.
These bracket supposed to be hot bended. However, in few occasions we found that steel supplier conducting cold bend instead of hot bend.
can anyone tell me what would be the best method to check whether these brackets are cold or hot bend?
Thanks in advance
We purchase our products from steel supplier in a Asian country. One of the products we are buying is 105 degree angle bended brackets.
These bracket supposed to be hot bended. However, in few occasions we found that steel supplier conducting cold bend instead of hot bend.
can anyone tell me what would be the best method to check whether these brackets are cold or hot bend?
Thanks in advance





RE: Steel brackets are being cold bended
My guess is that you really want them warm bent.
What minimum temp do you require?
What is the alloy?
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Plymouth Tube
RE: Steel brackets are being cold bended
RE: Steel brackets are being cold bended
I agree with you. What type hardness meassurement? Micro or Macro? Where is in the bracket you would like to perform the hardness? At the bend location? I am planning conduct portbale hardness measurements on the plate using Microduor Hardness tester? What are the typical hardness values we should be looking for if the brackets are being cold bend and hot bend.
Thanks in advance
RE: Steel brackets are being cold bended
The Microdur hardness tester is fine for this application. I would test the outside region of the bend and compare with the bracket material away from the bend. I would compare hardness readings between the two locations. For cold bending you will see higher hardness values (wider spread) in comparison to unaffected material. For hot bending, the hardness values would be closer in spread. I can't say how much difference because you did not provide the bracket composition. What you can do is test a bracket which has been confirmed as hot bent and compare with a bracket which has been confirmed as cold bent and actually compare the hardness differences.
RE: Steel brackets are being cold bended
The material is ASTM A572 grade 50. Do you know where can I get limits of cold and hot bending temperatures spread limits? Any standard you can refer?
Regards,
Demsha
RE: Steel brackets are being cold bended
RE: Steel brackets are being cold bended
Sorry I was referring to Hardness limits for cold and hot bending for the A 572 material.
Thanks
RE: Steel brackets are being cold bended
As I mentioned previously, perform hardness testing on a cold formed bracket and on a hot formed bracket. This will allow you to evaluate hot versus cold bending and compare with bulk hardness (away from the bend).