GB /T 3077-1999
Alloy Structure Steels
|
40Cr
(A20402)
|
|
Q/BQB 517-2018
Wire rods for cold heading
|
40Cr
|
|
GB /T 3078-2019
Quality structural steel cold drawm bars
|
40Cr
|
|
|
Q/BQB 135-2009
|
40Cr
|
|
|
|
40Cr
|
|
JB /T 6396-2006
Specification for the heavy alloy structural steel forings
|
40Cr
|
|
GB /T 3077-2015
Alloy structure steels
|
40Cr
(A20402)
|
|
|
Q/ASB 234-2018
|
40Cr
|
|
JB /T 6908-2020
Steel forings for displacement compressors
|
40Cr
(A20402)
|
|
GB /T 37601-2019
Hot rolled steel sheet and strip of alloy structure steel
|
40Cr
|
|
