The non-quenched and tempered steel 36Mn2V (0.34~0.38C
1.45~1.70Mn
0.11~0. 16V
0.020Als)was produced by hot metal pretreated -120 t converter melting -predeoxidizing by Pl deoxidizing agent with main component CaC
2
then alloying-LF + RH refining-280 mm × 380 mm billet concasting process at Panzhihua Steel. The analysis and examination results showed that the average yield of alloy element Si
Mn and V was respectively 85.8%
98.0% and 96.0%
and the T[O
]
of 140 mm round tube billet was 6.4×10
-6
~13.0×10
-6
(average 9.1×10
-6
)
the [N
]
was 28.0×10
-6
~59.0×10
-6
and the metallurgical quality of tube billet all met to the requirement of technical standard.