product description
Standard: EN10305-4(DIN2445/2), EN10305-1(DIN2391), ASTM A179
Steel Grade: E235 (ST35 ST37.4 ) , E355 (ST52 ST52.4)
Size: OD: 4-120mm, WT: 0.5-10mm, Length: Fixed 6m or as your requirement
Surface treatment: Phosphated--internal and external phosphated coating
Delivery condition: +N (NBK) normalized under controlled atmosphere
Delivery time: 15-45 days according to the quantity you need and if the goods in stock
Product Advantages
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Anti-rustHigh anti corrosion & anti rust -
Total phosphatingPhosphating inside and outside of steel pipe
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DelicateThe phosphated coating is delicate, high lubricity, uniform color
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ExteriorGood looking in appearance
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PaintingSuitable for painting, and have strong adhesion
Product Video
Cold drawn / cold rolled: High dimensional accuracy, excellent internal and external wall finish
Eddy current testing: Each steel pipe is tested by eddy current flaw detection to ensure product quality
Anaerobic bright heat treatment (NBK): When the seamless steel pipe is annealed, vacuum is applied and ammonia-decomposed nitrogen and hydrogen are injected for protection heating, heat preservation and cooling. It maintains the original rolling accuracy and smoothness of the steel pipe, and has excellent mechanical properties and metallographic structure.
Surface treatment (phosphated): We perform high-quality phosphating treatment on the inner and outer walls of seamless steel pipes to form a uniform and dense crystal structure, which has strong corrosion resistance and porosity, and has strong coloring ability during painting and plastic spraying.
Dimension
| OD | Thickness（m m） | ||||||||||
| mm | |||||||||||
| 6 | 6*1 | 6*1.5 | 6*2 | ||||||||
| 8 | 8*1 | 8*1.5 | 8*2 | ||||||||
| 10 | 10*1 | 10*1.5 | 10*2 | ||||||||
| 12 | 12*1 | 12*1.5 | 12*2 | 12*2.5 | |||||||
| 14 | 14*1 | 14*1.5 | 14*2 | 14*2.5 | 14*3 | ||||||
| 15 | 15*1 | 15*1.5 | 15*2 | 15*2.5 | 15*3 | ||||||
| 10*1 | 16*1 | 16*1.5 | 16*2 | 16*2.5 | 16*3 | ||||||
| 18 | 18*1.5 | 18*2 | 18*2.5 | 18*3 | 18*3.5 | 18*4 | |||||
| 20 | 20*1.5 | 20*2 | 20*2.5 | 20*3 | 20*3.5 | 20*4 | |||||
| 22 | 22*1.5 | 22*2 | 22*2.5 | 22*3 | 22*3.5 | 22*4 | |||||
| 25 | 25*2 | 25*2.5 | 25*3 | 25*3.5 | 25*4 | ||||||
| 28 | 28*2 | 28*2.5 | 28*3 | 28*3.5 | 28*4 | ||||||
| 30 | 30*2 | 30*2.5 | 30*3 | 30*3.5 | 30*4 | 30*4.5 | 30*5 | ||||
| 32 | 32*2 | 32*2.5 | 32*3 | 32*3.5 | 32*4 | 32*4.5 | 32*5 | ||||
| 34 | 34*2 | 34*2.5 | 34*3 | 34*3.5 | 34*4 | 34*4.5 | 34*5 | 34*6 | |||
| 35 | 35*2 | 35*2.5 | 35*3 | 35*3.5 | 35*4 | 35*4.5 | 35*5 | 35*6 | |||
| 38 | 38*2 | 38*2.5 | 38*3 | 38*3.5 | 38*4 | 38*4.5 | 38*5 | 38*6 | |||
| 40 | 40*2.5 | 40*3 | 40*3.5 | 40*4 | 40*4.5 | 40*5 | 40*6 | ||||
| 42 | 42*2.5 | 42*3 | 42*3.5 | 42*4 | 42*4.5 | 42*5 | 42*6 | ||||
| 45 | 45*2.5 | 45*3 | 45*3.5 | 45*4 | 45*4.5 | 45*5 | 45*6 | ||||
| 46 | 46*2.5 | 46*3 | 46*3.5 | 46*4 | 46*4.5 | 46*5 | 46*6 | ||||
| 48 | 48*2.5 | 48*3 | 48*3.5 | 48*4 | 48*4.5 | 48*5 | 48*6 | ||||
| 50 | 50*2.5 | 50*3 | 50*3.5 | 50*4 | 50*4.5 | 50*5 | 50*6 | ||||
| 54 | 54*3 | 54*3.5 | 54*4 | 54*4.5 | 54*5 | 54*6 | |||||
| 60 | 60*3 | 60*3.5 | 60*4 | 60*4.5 | 60*5 | 60*6 | 60*8 | ||||
Chemical composition
| Steel grade |
C max. |
Si max. |
Mn max. |
P max. |
S max. |
Altot min. |
|
| Name | Number | ||||||
| E215 | 1.0212 | 0.10 | 0.05 | 0.7 | 0.025 | 0.015 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.2 | 0.025 | 0.015 | — |
| E355 | 1.0580 | 0.22 | 0.55 | 1.6 | 0.025 | 0.015 | — |
Tolerance
| Outer Diameter | Allowable tolerance | special tolerance | |||||
| GB/T3639 | DIN2391 | OD | WT | ||||
| 4mm-20mm | ±0.10mm | ±0.08mm | ±0.05mm | ±0.05mm | |||
| 20mm-30mm | ±0.10mm | ±0.08mm | ±0.08mm | ±0.08mm | |||
| 31mm-40mm | ±0.15mm | ±0.15mm | ±0.10mm | ±0.08mm | |||
| 41mm-60mm | ±0.20mm | ±0.20mm | ±0.15mm | ±0.15mm | |||
| 61mm-80mm | ±0.30mm | ±0.30mm | ±0.20mm | ±0.20mm | |||
| 81mm-120mm | ±0.45mm | ±0.45mm | ±0.30mm | ±0.30mm | |||
Mechanical Properties
| Steel grade | Yield strengtha | Tensile strength | Elongation | ||||
| Name | Number | ReH | Rm | A | |||
| min. | min. | min. | |||||
| MPa | MPa | % | |||||
| E215 | 1.0212 | 215 | 290 to 430 | 30 | |||
| E235 | 1.0308 | 235 | 340 to 480 | 25 | |||
| E355 | 1.0580 | 355 | 490 to 630 | 22 | |||
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Application
For Agricultural Machinery
EN-10305 precision seamless steel tubes are widely used in various agricultural machinery.
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For Heavy Truck
SAE J524 precision seamless steel tubes are widely used in various heavy trucks and special vehicles.
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