[MW:8535] welding of alloy steel 20XGNTR

Dear team members,
 
Have somone faced with the welding of such kind of the material as below. please note that this is Russian GOST steel and I don't know the european or ASTM equivalent.
 

STEEL MARK				20ХГНТР  - 20XGNTR
CLASSIFICATION				Alloyed steel
Chemical composition % steel 20XGNTR.
C			Si	Mn	Ni	S		P		Cr	Ti	B
0.18-0.24			0.17-0.37	0.8-1.1	0.4-0.7	max 0.035		max 0.035		0.4-0.7	0.03-0.09	max 0.005
Mechanical properties at 20oС
			Tensile strength	Yield strentgh			Rel. elongation		Heat treated
			МПа	МПа			%		-
			1180	980			9		Quenching 850oC, oil, temper 200oC, oil,

 
Please share your knowledge on this. I need some usefull instruction for welding of this steel.
 
Many thanks,
Martin.