Process: After pickling, cold-drawn, no oxidization heat treatment, nondestructive testing, the wall honing and inside flushing under high pressure, antirust oiling inside and outside.

Feature: High precision, good brightness,
No oxidize residual, could withstand high pressure,
No deformation after cold bending,
No crack and break after flattening and flaring,
Good mechanical property and no deformation after bending at any angle.

1) Description: Cold-drawn high precision seamless steel tube
2) Brandname: Yineng tube
3) Grade: 10#; 20#; 45#; ST35; ST37; ST37.4; ST45; ST52.4; etc.
4) Standard: ASTM A519; JIS; DIN2391; EN10305-1 or any other equivalent stardard
5) Specification: Outer Diameter: 4mm-50mm;
Wall Thickness: 0.5mm-5mm
6) Diameter tolerance: 0.05mm (Enterprise internal control) or 0.03mm(Special high-precision)
7) Length: 4-12 Meters
8) Surface treatment:
1. Bare Tube (No coating)-Bright and smooth; Surface Roughness: BK≤ 0.2Ra; NBK≤ 2Ra
2. Surface coating
A. Silver galvanized
B. Yellow galvanized
C. Olive green coated
Layer thickness: 8-25um; Saity spray test: 48-150 hours
9) Process method: Cold-drawn or cold-rolled
10) Packing: Wrapped with PVC and gunny sacks
11) Basic Inspection: Chemical analysis and mechanical testing
12) MOQ: 1 MT
13) Delivery time: 45 days after 30% deposite;
Or upon receipt of relevant L/C
14) Production capability: 300 MT/month
15) Payment method: T/T; L/C; D/P; Other electric payment such as paypal
16) Certification: ISO9001: 2000
17) Application:
Automotive pipeline system;
Hydraulic system of diesel engine and engineering machinery;
Hydraulic system of locomotive, aerospace and aviation,
Shipbuilding and various machinery;
metal processing of wind power equipment;
etc.
18) Delivery condition:
A. BK(+C) Cold finished/hard (cold finished as drawn)
No heat treatment after the last cold forming process
B. BKW(+CC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing)
C. BKS(+SR) cold finished/stress relieve annealed
After the final cold forming process the tubes are stress relieve annealed
D. GBK(+A) Annealed
After the final cold forming process the tubes are annealed in a controlled atmosphere
NBK(+N) Normalized
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.