• Usage：Machinery Industry
• Section Shape：Round
• Od：4~60mm.
• Wt：0.5-7mm
• Material Grade：Stkm11A, Stkm12A, Stkm13A, St52, E355 etc.
• Manufacturing Standards：JIS 3445, ASTM A519
• Transport Package：Seaworthy Export Packing
• Specification：ASTM, JIS, DIN
• Trademark：KM
• Origin：China
• HS Code：730431
• Production Capacity：3000 Tons,Month

Standard
Material
EN10305-1
E215, E235, E255, E355,C45E, 30GrMo
DIN2391
ST35, ST45, ST52, ST37.4
BS6323/4
CFS3,CFS4,CFS5,CFS8
ASTMA519
SAE1010,SAE1020,SAE1045
JISG3445
STKM11A,STKM13A
SAEJ524
SAE1010
 
 Tolerance Table Of Steel Tube
NAME
SCOPE(mm)
GB (mm)
DIN (mm)
Enterprise control(mm)
Special high-precision(mm)
Out Diameter
4-30
±0.1
±0.08
±0.05
±0.03
31-40
±0.15
±0.15
±0.05
±0.03
41-50
±0.20
±0.20
±0.08
±0.03
51-60
±0.25
±0.25
±0.08
±0.03
Wall thickness 
0.5-7
±10%,Min±0.12
±10%
±10%,Min±0.05
±10%,Min±0.03
 
Delivery condition and heat treatment processing of carbon Precision steel tube
Delivery Condition
Heat treatment process
+C
Cold drawn/hard.After the last cold forming,no heat treatment.
+LC
Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass.
 
+SR
Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+A
After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+N
Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.