JIS3445 Stkm11A 12A 13A Precision Seamless Steel Tube

Standard & Material:
DIN2391 St35, St45, St52
ASTM A519 1010, 1020, 1025, 1035, 1045
ASTM A513 1010, 1020, 1025, 1035, 1040
BS6323 CFS, CFS3A, CFS4-11
EN10305-1 E215, E235, E355
JIS G 3441 SCM415TK, SCM 430 TK, SCM 440 TK
JIS 3445 STKM11A, STKM12(A, B, C), STKM13(A, B, C), STKM14(A, B, C)

Outside diameter: 10mm~60.3mm
Wall Thickness: 1mm~10mm
Length: 3m-14m, also can be manufactured according to customers' requirements

DELIVERY CONDITIONS
The tubes can be produced in the following delivery conditions: 
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
 
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
 
BKS (+SR) Cold finished/stress relieve annealed. 
After the final cold forming process the tubes are stress relieve annealed.
 
GBK (+A) Annealed. 
After the final cold forming process the tubes are annealed in a controlled atmosphere.
 
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
 
Application:
Precision equipment, automotive, precision instrument, mechanical component