Steel material and mold

Abstract

The present invention relates to a steel material including: 0.25 mass %≤C≤0.37 mass %; 0.08 mass %≤V≤0.28 mass %; 6.60 mass %≤Mn+Cr≤7.40 mass %; Mn/Cr≤0.150; Mn≥0.60 mass %; Cr≤6.60 mass %; Cu+Ni≤0.84 mass %; 0.40 mass %≤Si≤0.90 mass %; 0.60 mass %≤Mo≤2.00 mass %; 0.001 mass %≤Al≤0.080 mass %; and 0.003 mass %≤N≤0.040 mass %, with the balance being Fe and unavoidable impurities.

What is claimed is: 
     
         1 . A steel material comprising:
   0.25 mass %≤C≤0.37 mass %;
     0.08 mass %≤V≤0.28 mass %;
     6.60 mass %≤Mn+Cr≤7.40 mass %;
     Mn/Cr≤0.150;
     Mn≥0.60 mass %;
     Cr≤6.60 mass %;
     Cu+Ni≤0.84 mass %;
     0.40 mass %≤Si≤0.90 mass %;
     0.60 mass %≤Mo≤2.00 mass %;
     0.001 mass %≤Al≤0.080 mass %; and
     0.003 mass %≤N≤0.040 mass %,
   with the balance being Fe and unavoidable impurities.   
     
     
         2 . The steel material according to  claim 1 , further comprising:
 at least one Group selected from the group consisting of Group A, Group B, Group C, and Group D,   wherein Group A is at least one element selected from the group consisting of 0.30 mass %<ω<2.00 mass %, and 0.30 mass %<Co≤1.00 mass %,   Group B is 0.0002 mass %<B≤0.0080 mass %,   Group C is at least one element selected from the group consisting of 0.006 mass %<S≤0.180 mass %, 0.0005 mass %<Ca≤0.0500 mass %, 0.03 mass %<Se≤0.50 mass %, 0.005 mass %<Te≤0.100 mass %, 0.01 mass %<Bi≤0.50 mass %, and 0.03 mass %<Pb≤0.50 mass %, and   Group D is at least one element selected from the group consisting of 0.004 mass %<Nb≤0.100 mass %, 0.004 mass %<Ta≤0.100 mass %, 0.004 mass %<Ti≤0.100 mass %, and 0.004 mass %<Zr≤0.100 mass %.   
     
     
         3 . The steel material according to  claim 1 , having a mass of 3000 kg or more, and having a dimension (L min ), which is minimum among a longitudinal dimension (L 1 ), a lateral dimension (L 2 ), and a height dimension (L 3 ), of 300 mm or more. 
     
     
         4 . The steel material according to  claim 2 , having a mass of 3000 kg or more, and having a dimension (L min ), which is minimum among a longitudinal dimension (L 1 ), a lateral dimension (L 2 ), and a height dimension (L 3 ), of 300 mm or more. 
     
     
         5 . A mold being produced from the steel material according to  claim 1  and having a mass of 2000 kg or more.