Product Details

product description

We produces various precision seamless steel tube and agent high precision cold-drawn welded tube (DOM) of Italy Marcegaglia. Our products such as :

♣cold drawn precision seamless steel tube

♣cold rolled steel tube
♣SRB tube
♣honed tube

Product Item	Round st37.4 carbon seamless steel tube made in China
Outer Diameter	30mm~250mm
Wall Thickness	2mm~30mm
Material Grade	10#-45#, 16Mn, Q195-Q345, ST35-ST52, STB35-STB42, 20#, 45#, 16Mn, Q345, ST35, St45, St52, St52.4, STB42, 10#-45#,ST35-ST52
Standard	ASTM, DIN, ASTM A1020-2002, DIN 2391
Application	Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, textile machinery
Certificate	ISO9001:2008
Process Method	Cold Drawn/ Cold Rolled
Surface Finish	Annealed, Pickled or according to the customer’s acquirement
Package	According to the customer’s requirement
Delivery Time	10days more or according to the customer’s requirement
Price Item	FOB CIF EXW
Payment	T/T(30% in advance, 70% against the BL Copy) and L/C at sight or as negotiation
ID tolerance	H8,H9b H10 or as customized
Surface roughness	Ra0.2~0.8µm
Finally supply condition	BK BKS BKW NBK GBK

Tolerance in Dimension:

OD	GB/T3639(GB8713)	DIN2391(EN10305)	Our Tolerence	Best Quality
4-30mm	±0.10mm	±0.08mm	±0.05mm	±0.02mm
31-40mm	±0.15mm	±0.15mm	±0.05mm	±0.03mm
41-50mm	±0.20mm	±0.20mm	±0.05mm	±0.03mm
51-60mm	±0.25mm	±0.25mm	±0.08mm	±0.03mm
61-70mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
71-160mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
Tolerance in WT	±0.12mm	±0.10mm	±0.05mm	±0.03mm

Process	Diameter	Length	Precision	Inner Hole Roughness
Cold Rolled	30-100mm	≤12 m	H8-H10	0.4-1.6
Cold Draw	30-250mm	≤12 m	H8-H10	0.8-1.6
Honing	40-500mm	≤12 m	H8-H9	0.4-0.8
Rolling	40-400mm	≤7 m	H8	0.4

Inner Diameter	H8	H9	H10
30mm	±0.033	±0.052	±0.084	5-30mm
30-50mm	±0.039	±0.062	±0.100	±0.080
50-80mm	±0.046	±0.074	±0.120
80-120mm	±0.054	±0.087	±0.140
120-180mm	±0.063	±0.100	±0.160
180-250mm	±0.072	±0.115	±0.185
250-315mm	±0.081	±0.130	±0.210
315-400mm	±0.089	±0.140	±0.230

finished products

company information

our company according to customers' requirements specifications of the production of seamless steel tube and cold rolling precision seamless steel tube , high precision welded pipe and automobile parts tube, hydraulic cylinder steel tube,cold drawn seamless steel tube ,which widely used in hydraulic cylinder ,automobile ,oil drilling ,etc.

packaging and delivery

Please don’t worry that our products are packed, stored, transported according to the international regulation. We do care about the quality of our products; even some little details are paid attention to. We wrap the precision steel pipe with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement. Plus, our storage racks are made of wood. Any unwanted chemical reaction can be prevented.

our services

1. Cargo track service during transporting and feedback service after cargo is loaded on board

2. Flexible terms of payment by

3. Big discount for repeat customers

4. Smooth delivering procedure

5. Payment Terms: T/T , L/C And so on.

our certificate

our testing

our processing

FAQ

Q: What about your payment term?

A: Usually T/T or L/C, 30% deposit and 70% before delivery.