GH1139, original GH139, also expressed as 12 cr25ni16mn7nb, brand comes from the former Soviet union Э И 835, is a veteran of austenite[SCALE STEEL] steel body is strong, its density is 7.83 g/cm3, main products for the sheet and rod form.
Component Specification（GB/T 14992-2005）
C ≤0.12 Cr 23.00~26.00 Ni 15.00~18.00
Si ≤1.00 P ≤0.035 N 0.30~0.45
Mn 5.00~7.00 S ≤0.020[SCALE STEEL] B ≤0.010
The performance level of GH1139 alloy is similar to that of GH3030 alloy. It has the characteristics of good hot working plasticity, stable structure [SCALE STEEL] and friendly welding. It is suitable for making high-temperature bearing parts such as combustion chamber after stamping and welding, such as gas conduit parts made of thin plate, strip and profile working at 800~950℃ and medium stress.