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Continuous casting round/square billet
　1. Specifications
 
Category Grade Specification（mm） Production standards
High quality carbon steel 20～45,
SAE1045,
S45C, C45,
C45E,
CK45
and etc.		 Φ300, Φ380, Φ400,
Φ450, Φ500, Φ600
rectangle 200×380,
200×400		 GB, ASTM, JIS, DIN or customer specified requirements
Low alloy steel Q345A
(B, C, D, E)		 Φ300, Φ380, Φ400,
Φ450, Φ500, Φ600
rectangle 200×380,
200×400		 GB, ASTM, JIS, DIN or customer specified requirements
Alloy steel 42CrMoA,
40Cr,  
SCM440,
4140,
42CrMo4
and etc.		 Φ300, Φ380, Φ400,
Φ450, Φ500, Φ600
rectangle 200×380,
200×400		 GB, ASTM, JIS, DIN or customer specified requirements
Pipeline steel 37Mn5, L290,
29Mn2,
12Cr1MoVG,
P91, P92
and etc.		 Φ300, Φ380, Φ400,
Φ450, Φ500, Φ600		 GB or customer specified requirements
Alloy tool steel 5CrMnMo，
5CrNiMo
4Cr5MoSiV1
and etc.		 Φ300, Φ380, Φ400,
Φ450, Φ500, Φ600
rectangle 200×380,
200×400		 GB or customer specified requirements
Railway steel U71Mn, 900A
and etc.		 rectangle 200×380,
200×400		 TB/T2344-2012 or customer specified requirements
 
　2. Product Quality Level
 
Category Grade Chemical component Non-metallic Inclusion Harden
ability
HRC

 

 

 P
≤
(%)		 S
≤
(%)		 [O] 
≤
(ppm)		 A
thin
≤		 A
heavy
≤		 B
thin
≤		 B
heavy
≤		 C
thin
≤		 C
heavy
≤		 D
thin
≤		 D
heavy
≤		 Ds
≤
Carbon steel SAE1045,
S45C,
CK45, 45		 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0

 

 
Alloy steel 42CrMo,
40Cr		 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0 1.5

 
Pipeline steel 37Mn5, L290, 29Mn2, 12Cr1MoVg 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0

 

 
Gear steel 20CrMoH,  20CrMnTiH, 20CrNiMoH 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0

 

 ≤6
SCM420H, SCM822H 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0

 

 ≤6
Spring steel 60Si2CrVA 0.015 0.005 20 1.5 1.0 1.5 1.0 0 0 1.5 1.0

 

 
Bearing steel GCr15 0.015 0.005 10 1.0 0.5 1.0 0.5 0 0 1.0 0.5 1.0