EN 10305-1 E235 Cold Drawn Precision Seamless Tubes
- EN 10305-1
- China
- Stock
- E215,E235,E355
EN 10305-1 E235 for seamless cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D ≤ 380 mm
EN 10305-1 E235 Cold Drawn Precision Seamless Tubes
EN 10305-1 E235 Seamless cold drawn tubes
EN 10305-1 E235 Steel tubes for precision applications - Technical delivery conditions - Part 1: Seamless cold drawn tubes
EN 10305-1 E235 Seamless cold drawn tubes Quick Details
Company Name: Beite steel pipe
Country/Region: China
Material：E235
FOB Price: US $1500-3000 / Ton | 1 Ton/Tons (Min. Order)
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package：Standard export package,suit for all kinds of transport, or as required
EN 10305-1 E235 Seamless cold drawn tubes Dimensional Range & Specification
Outside Diameter：4mm-260mm
Wall thickness：0.5mm——25mm
Length：6000mm、12000m or specified length as required.
EN 10305-1 E235 Seamless cold drawn tubes
Standard:EN 10305-1
EN 10305-1 E235 for seamless cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D ≤ 380 mm.
Tubes according to the EN 10305-1 are characterized by having precisely defined tolerances on dimensions and a specified maximum surface roughnes
Manufacturing process
The steelmaking process is at the discretion of the manufacturer with the exception that the open hearth (Siemens-Martin) process shall not be employed unless in combination with a secondary steelmaking or ladle refining process.
Steels shall be fully killed.
NOTE This excludes the use of rimming, balanced or semi-killed steel.
Tube manufacture and delivery conditions
The tubes shall be manufactured from hot finished seamless hollows by cold drawing.
The tubes shall be supplied in one of the delivery conditions given in Table 1.
Table 1 — Delivery conditions
| Designation | Symbol a | Description |
| Cold drawn / hard | +C | No final heat treatment after final cold drawing. |
| Cold drawn / soft | +LC | Final heat treatment is followed by a suitable drawing pass (limited reduction of area) |
| Cold drawn and stress relieved | +SR | After final cold drawing the tubes are stress relieved in a controlled atmosphere. |
| Soft annealed | +A | After final cold drawing the tubes are soft annealed in a controlled atmosphere |
| Normalized | +N | After final cold drawing the tubes are normalized in a controlled atmosphere. |
| a:In accordance with EN 10027–1 | ||
Chemical composition of EN 10305-1 E235 Seamless cold drawn tubes
Option 1: A steel grade not specified in this document, with a maximum total content of alloying elements of 5 % and agreed chemical composition, mechanical properties and delivery condition, is specified.
Table 2 — Chemical composition (cast analysis)
| Steel grade | % by mass | ||||||
| Steel name | Steel number | C max. | Si max. | Mn max | P max. | S ,a max | Al,total b min |
| E235 | 1.0308 | 0,17 | 0,35 | 1,20 | 0,025 | 0,025 | 0,015 |
| Elements not quoted in this table (but see footnote b ) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for the purposes of deoxidation and/or nitrogen binding. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process. | |||||||
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a :See option 2. b :This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V. If added, the content of these elements shall be reported in the inspection document. When using titanium, the manufacturer shall verify that (Al + Ti/2) ≥ 0,020. |
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Option 2: For the steel grades E235 a controlled sulphur content of 0,015 % to 0,040 % is specified to support machinability. It shall be obtained by resulphurizing the steel after maximum desulphurization or alternatively by using a low oxygen process.
Option 3: The chemical composition of the specified steel grade shall be such that it is suitable for hot-dip galvanizing (see e.g. EN ISO 1461 or EN ISO 14713-2 for guidance).
Mechanical properties of EN 10305-1 E235
NOTE Subsequent processing (cold or hot) may change the mechanical properties.
Table 3 — Mechanical properties at room temperature
| Steel grade | Minimum values for the delivery condition a | ||||||||||||
| +C b | +LC b | +SR | +A c | +N | |||||||||
| Steel name | Steel number | R m (MPa) | A % | R m (MPa) | A % | R m (MPa) | R eH (MPa) | A % | R m (MPa) | A % | R m (MPa) |
R eH d (MPa) |
A % |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 440 to 480 | 235 | 25 |
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a ,R m : tensile strength; R eH : upper yield strength (but see 11.1); A: elongation after fracture. For symbols for the delivery condition see Table 1. b ,Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength. For calculation purposes the following relationships are recommended: — for delivery condition +C: R eH ≥ 0,8 R m ; — for delivery condition +LC: R eH ≥ 0,7 R m. c ,For calculation purposes the following relationship is recommended: R eH ≥ 0,5 R m . d ,For tubes with outside diameter ≤ 30 mm and wall thickness ≤ 3 mm the R eH minimum values are 10 MPa lower than the values given in this table. e ,For tubes with outside diameter > 160 mm: R eH ≥ 420 MPa. |
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Summary of testing
Chemical analysis
Tensile test
Dimensional inspection
Visual examination
Flattening test or drift expanding test
Roughness measurement
NDT on longitudinal imperfections
NDT for verification of leak tightness
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