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Brand Name : YUHONG
Model Number : E235+N,ST37.4,ST52.4
Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin : CHINA
MOQ : 100KGS
Payment Terms : L/C, T/T
Delivery Time : 7DAYS
Packaging Details : Plywood case,Bundle
OD : 3/4" (19.05), 1"(25.4) , 1-1/4"(31.75), 1-1/2"(38.1), 2" (50.8), 2-1/2"(63.5) , 3" (76.2)
USAGE : Heat Exchanger Tube, Boiler Tube
STANDARD : EN10305-1
MATERIAL : ST37.4, ST52.4,E235+N
WT : 0.89,1,1.24,2.11MM....
EN10305-1 E235+N NBK Precision Seamless Tube For Automobile Usage
| Steel Grade | Chemical Components (%) | ||||||
| Steel Name | Steel Number | C max. | Si max. | Mn max. | P max. | S max. | AL min. |
| E215 | 1.0212 | 0.10 | 0.05 | 0.7 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.2 | 0.025 | 0.025 | / |
| E355 | 1.058 | 0.22 | 0.55 | 1.6 | 0.025 | 0.025 | / |
The tubes shall be manufactured from hot finished seamless tubes by cold drawing or other suitable processes. The tubes shall be supplied in one of the delivery conditions as follows:
| Designation | Symbol | Description |
| Cold drawn/hard | +C | No heat treatment after the final cold drawing process. |
| Cold drawn/soft | +LC | After the final heat treatment there is a suitable drawing pass. |
| Cold drawn and stress relieved | +SR | After the final cold drawing process there is a 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 operation, the tubes are normalized in a controlled atmosphere. |
Delivery Condition Symbol in accordance with EN10305 and DIN2391
| Symbol in accordance with EN 10305 | Symbol in accordance with DIN2391 |
| +C | BK |
| +LC | BKW |
| +SR | BKS |
| +A | GBK |
| +N | NBK |

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EN10305-1 E235+N NBK Precision Seamless Tube For Automobile Usage Images |