Carbon Steel Pipes
Precision Steel Tubes
CNG Tubes
GB/T 3639 10
GB/T 3639 20
GB/T 3639 35
GB/T 3639 45
GB/T 3639 Q355B
Product

 

 

 

 

 


Home | About Us | Product | Know How | Contact Us
   
GB/T 3639 Seamless cold-drawn or cold-rolled steel tubes for precision applications
Standard: GB/T 3639
Equivalent Standards: EN 10305-1, NF 699, DIN 2391, ASTM A519, GOST 9567-75, NBR 8476, BS 6323 Part 4, NF A 49-330-85, BS 6323-4, NF A 49-310, UNI 6403
Material: Q355B
Equivalent Materials: E355, Q345B
Chemistry Composition
C, %
Si, %
Mn, %
P, %
S, %
Cr, %
Ni, %
Cu, %
0.24 max
0.55 max
1.60 max
0.025 max
0.025 max
0.30 max
0.30 max
0.40 max
Mechanical Properties
Tensile Strength , MPa
Yield Strength, MPa
Elongation, %
Delivery Condition
640 min
-
4 min
+C
580 min
-
7 min
+LC
580 min
450 min
10 min
+SR
450 min
-
22 min
+A
490-630
355 min
22 min
+N
GB/T 3639 specifies the classification, code, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of cold drawn or cold rolled precision seamless steel tubes. GB/T 3639 is suitable for manufacturing cold drawn or cold rolled precision seamless steel tubes with special dimensional accuracy and high surface quality requirements, such as mechanical structures, hydraulic equipment, and auto parts.
GB/T 3639规定了冷拔或冷轧精密无缝钢管的分类、代号、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 3639适用于制造机械结构、液压设备、汽车零部件等具有特殊尺寸精度和高表面质量要求的冷拔或冷轧精密无缝钢管。
Manufacture: the tubes shall be manufactured from hot finished seamless tubes by cold drawing or other suitable processes.
Delivery Condition: cold drawn (hard) as +C, cold drawn (soft) as +LC, cold drawn and stress relieved as +SR, annealed as +A, normalized as +N.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check.
Length: 2000mm; 6000mm; 10000mm; 12000mm; and so on.
Further process: cutting, deformation.
Keyword: precision steel tube, GB/T 3639, precision steel tube, high precision, cng tube, HPL Tube
Home | About Us | Product | Know How | Contact Us
Copyright © TubeMFG. Powered by TubeSolution