This standard specifies the test method for plastic plane anisotropy of thin metal plates marked by lug ratio (e). This standard applies to thin metal plates with a thickness of 0.10 to 3.00 mm.
GB/T 15825.7-1995 history
2008GB/T 15825.7-2008 Sheet metal formability and test methods.Part 7:Earing test
1995GB/T 15825.7-1995 Sheet metal formability and methods--Earing test