| Specification: | EN 10294-1 E355+N | Grade: | A53-A369， 16mn， 10#-45#， Cr-Mo Alloy， ST35-ST52， Q195-Q34 |
|---|---|---|---|
| Surface: | Bright | Shape: | Round Hollow Bars |
| Technique: | Cold Drawn | Package: | Standard Seaworthy Package |
| Application: | Hydraulic Systems | Keywords: | Precision Steel Tube， EN 10305-1， Precision Steel Pipe， High Precision， HPL Tube |
| High Light: | EN 10294-1 Carbon Steel Seamless Tube， Carbon Steel Seamless Bright Annealed Tube， Automobile Sectors Bright Annealed Tube | ||
EN 10294-1 Grade E355+N Carbon Steel Seamless Bright Annealed Tube
TONG CHUANG Group is one of the largest manufacturers of stainless steel， duplex and alloy steel pipes in China. After more than 20 years of development， we have accumulated many customers all over the world， and TONG CHUANG products have won favorable comments from them.
Standard: EN 10305-1
Equivalent standards 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 E355， 1.0580
Equivalent materials St52， St52.4， CFS 5， TU 52-b， Q345B， S355GT， TU 526， FE 510
Tubes according to EN 10305 have precisely defined dimensional tolerances and specified surface roughness. Seamless precision steel tubes according to EN 10305 must be manufactured from hot finished seamless steel tubes by cold drawing. Other suitable cold working methods are permitted. The tubes shall be delivered under +N delivery conditions， which means that after the final cold drawing operation the tubes shall be normalized in a controlled atmosphere.
Specification
| Name | E355+N Black Phosphated Steel Tube with High Precision |
| Specification | DIN2391-94/C， EN10305-1， EN10305-4， SAE J524， GB/T3639-2009 |
| Steel Grade | St35， St37.4， St45， St52.4， E235， E255， E355 |
| Size | OD:3-76mm， wall thickness: 0.5-6mm |
| Length | 4m，6m or customized |
| Delivery Conditions | NBK(+N)， BK(+C)， GBK(+A)， BKW(+LC)， BKS(+SR) |
| Features | High cleanness inside wall， No deformation after cold bending， no crack after flaring and flattening， complicated geometrical forming and machining can be realized |
| Applications | Used in hydraulic system， automobile and in the occasion where the high precision， brightness， cleanness and mechanical properties of the tube are required |
Chemical Compositions
| Steel Gr. | Steel No. | Chemical Compositions(%by mass) | |||||
| C(max) | Si(max) | Mn | P(max) | S(max) | Al(min)Total | ||
| St35， St37.4(E235) | 1.0305 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 | 0.015 |
| St45(E255) | 1.0408 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 | 0.015 |
| St52， St52.4(E355) | 1.0508 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 | 0.02 |
Mechanical Properties
| Steel Gr. | Steel | BK | BKW | BKS | GBK | NBK | |||||||
| No. | Rm | A | Rm | A | Rm | ReH | A | Rm | A | Rm | ReH | A | |
| MPa | % | MPa | % | MPa | MPa | % | MPa | % | MPa | MPa | % | ||
| Min | Min | Min | Min | Min | Min | Min | Min | Min | Min | Min | |||
| St35(E235) | 1.0305 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| St45(E255) | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| St52(E355) | 1.0508 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
EN 10305-1 Delivery Condition
| Term | Symbol | Explanation |
| Cold-finished/hard | +C | No heat treatment after the final cold drawing process |
| Cold-finished/soft | +LC | After the final heat treatment there is a suitable drawing pass. |
| Cold Drawn and Stress Relieved | +SR | After the final cold-forming process there is Stress relief heat treatment in a controlled atmosphere. |
| Annealed | +A | After the final cold drawing process the tubes are annealed in a controlled atmosphere. |
| Normalized | +N | After the final cold drawing process the tubes are Normalized in a controlled atmosphere. |
Application
EN 10294-1 Grade E355+N Hollow Bars are used mainly for automobile sectors， interior & exterior architectural structures， water pipe lines， Gas lines， Oil & Gas industries etc.
Key words: Carbon Steel Hollow Bars， E355+N Hollow Bars， EN 10294-1 Seamless Hollow Bars， Ferritic Carbon Steel Hollow Bars， Ferritic Steel Hollow Bars， Seamless Steel Hollow Bars， Steel Hollow Bars
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