Specifications

EN10305-2 DOM E355 Cold drawn welded tube
Grade :45# , 20#, Q345B, 25Mn, 16Mn
MOQ: 1MT
Fast delivery
Top Quality

EN10305-2 DOM E355 Cold drawn welded tube

 

Specification:Cylinder ID:30mm-250mm

Thickness: above 4mm hydraulic honed steel piping High precision cold drawn

Material :20#,45#(CK45),16Mn(ST52),25Mn,27SiMn

 

Working method	Cylinder ID (mm)	Length (m)	Straightness (mm/m)	Tolerance on ID	Tolerance on WT	Roughness (μm)
Cold drawn	30-250	≤12M	0.2-0.5	/	±5%	0.8-1.6
Cold rolling	30-250	≥12M	0.2-0.5	/	±5%	0.8-1.2
cold drawn-honed	50-250	8M	0.2-0.3	H8-H9	±5%	0.2-0.8
Cold drawn-roll	30-250	7M	0.2-0.3	H8-H9	±5%	≤0.4

 
 
 ( Mechanical property) :
 

Final Supply Condition	Cold finished (Hard)(BK)		Cold drawn and stress-relieved (BK+S)			Hardness HB
Parameters	T.S obN/mm 2	Elongation δ5%	T.S obN/mm 2	Y.S OsN/mm 2	Elongation δ5%
20#	≥550	≥8	≥520	≥470	≥12	175
45#(CK45)	≥650	≥5	≥600	≥520	≥12	207
16Mn(ST52)	≥640	≥5	≥600	≥520	≥15	190
25Mn	≥640	≥5	≥600	≥510	≥15	195
27SiMn	≥840	≥5	≥800	≥720	≥10	230

   
 
(Tolerance on ID)GB1808-99:
 

ID Min.	(Tolerance on OD)μm
	H7	H8	H9	H10
30	+21 0	+33 0	+52 0	+84 0
>30-50	+25 0	+39 0	+62 0	+100 0
>50-80	+30 0	+46 0	+74 0	+120 0
>80-120	+ 35 0	+ 54 0	+87 0	+140 0
>120-180	+40 0	+63 0	+100 0	+160 0
>180-250	+46 0	+72 0	+115 0	+185 0
>250-315	+52 0	+81 0	+140 0	+210 0
>315-400	+57 0	+89 0	+170 0	+230 0

 

 Finished products

 

 RFQ: 

 

Q1.What do you want to purchase ?

 

What we can offer are cold drawn/cold rolled steel pipes, cold drawn honing pipes,cold drawn

 

welded tubes(DOM tubes) ,seamless steel pipe etc.Wide Scope and Top Quality !

 

 

Q2.Do you have the target price ?

 

Generally ,we have the target price when we buy something ,which is good for both supplier and

 

customer ,at the same time ,the target price should be objective ,reflecting the market.

 

 

Q3.What factors have an effect on the price ?

 

1 The market. our price rise and fall accompany with the market

 

2 The material and the grade .Different materials sometimes mean hundreds dollars.

 

3 The sizes. generally ,the thinner is more expensive because of the manufacture difficulty

 

Any further Question, please feel free to contact us!