China Thick Wall Precision Hydraulic Seamless Carbon Steel Pipe

Cold Drawn / Rolled Seamless Precision Steel Tubes Confirming to DIN2391; EN10305-1; EN10305-4
Steel Grade: ST37.4, ST35, E235, E355Delivery Condition: NBK
Length: 3-6m Packing: Internal wrapped with plastic foilODThickness (mm)mm66*16*1.56*2 88*18*1.58*2 1010*110*1.510*2 1212*112*1.512*212*2.5 1414*114*1.514*214*2.514*31515*115*1.515*215*2.515*31616*116*1.516*216*2.516*318 18*1.518*218*2.518*318*3.518*4 20 20*1.520*220*2.520*320*3.520*4 22 22*1.522*222*2.522*322*3.522*4 25 25*225*2.525*325*3.525*4 28 28*228*2.528*328*3.528*4 30 30*230*2.530*330*3.530*430*4.530*5 32 32*232*2.532*332*3.532*432*4.532*5 34 34*234*2.534*334*3.534*434*4.534*534*6 35 35*235*2.535*335*3.535*435*4.535*535*6 38 38*238*2.538*338*3.538*438*4.538*538*6 4040*2.540*340*3.540*440*4.540*540*6 4242*2.542*342*3.542*442*4.542*542*6 4545*2.545*345*3.545*445*4.545*545*6 4646*2.546*346*3.546*446*4.546*546*6 4848*2.548*348*3.548*448*4.548*548*6 5050*2.550*350*3.550*450*4.550*550*6 54 54*354*3.554*454*4.554*554*6 60 60*360*3.560*460*4.560*560*660*8Note: 1. We can produce other specification as your requirements.
2. Surface treatment: Bright, galvanized (yellow, white, colorful), phosphated,army green passivation.
3. If you need other sizes, we also can produce.

Steel gradeC
max.Si
max.Mn
max.P
max.S
max.Altot
min.NameNumberE2151.02120.10 0.050.70.0250.0150.025E2351.03080.17 0.351.20.0250.015--E3551.0580 0.22 0.551.60.0250.015--

Outer DiameterAllowable tolerancespecial toleranceGB/T3639DIN2391ODWT4mm-20mm±0.10mm±0.08mm±0.05mm±0.05mm20mm-30mm±0.10mm±0.08mm±0.08mm±0.08mm31mm-40mm±0.15mm±0.15mm±0.10mm±0.08mm41mm-60mm±0.20mm±0.20mm±0.15mm±0.15mm61mm-80mm±0.30mm±0.30mm±0.20mm±0.20mm81mm-120mm±0.45mm±0.45mm±0.30mm±0.30mm

Steel gradeYield strengthaTensile strengthElongationNameNumberReH Rmmin.min.min.MPaMPa%E2151.0212215290 to 43030E2351.0308235340 to 48025E3551.0580 355490 to 63022

DesignationSymbolDescriptionCold finished (hard)BK(+C)
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold finished (Soft)BKW
(+LC)
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)
Cold finished and stress-relievedBKS(+SR)
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
AnnealedGBK(+A)The last Cold forming process is followed by annealing in a controlled atmosphere.NormalizedNBK(+N)The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

1.Strictly according to DIN2391/EN10305
2.Sample: Sample is free for test.
3.Test:salt spray test/tensile test / Eddy current / chemical composition test according to customers' request
4.Certificate:IATF16949,ISO9001,SGS etc
1. MOQ: if the size is Metric, it's no MOQ, if the size is Inch, the MOQ is 1 ton per size
2. OEM: we can produce the tubes as client's demand
3. Good Quality: we strictly control every production process to ensure the high quality
4. After-sales service: we not only guarantee the precision tubes'
quality but also provide technical support
5. Fast delivery: if we have precision tubes in stock, will deliver the tubes after 5-15 days.
If we don't have the raw material, will deliver the tubes after 30-40 days according to the quantity.
Q: Are you trading company or manufacturer ?
A: We are professional steel tube manufacture since 2003
Q:What certificates do you have ?
A:IATF16949,ISO9001,SGS
Q: How long is your delivery time?
A: According to quantity .Generally 50days after receive deposit ,
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.