Tubo rigido in acciaio DIN 2391

a norme ASTMDINa norma europea

Product Description

• Product name: DIN 2391 phosphating precision seamless steel pipe
• Standard: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391), ASTM A179
• Steel grade: E235 (ST35 ST37.4), E355 (ST52 ST52.4)
• Size: OD: 4-120 mm, WT: 0.5-10 mm
• Length: fixed 6 m or as your request
• Surface Treatment: Phosphating – External phosphating coating (inner and outer phosphating)
• Delivery condition: +N (NBK) normalized under a controlled atmosphere
• Delivery time: 15-45 days, according to quantity and stock

Product Advantages

• Anti-rust: High anti-corrosion and anti-rust performance
• Total phosphating: Phosphating inside and outside of steel pipe
• Delicate: Phosphated coating is delicate, high lubricity, uniform color
• Exterior: Good looking appearance
• Painting: Suitable for painting and has strong coloring ability

Product Video / Process Highlights
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): Annealing in vacuum with protective gases to maintain rolling accuracy, smoothness, mechanical properties and metallographic structure.
Surface treatment (phosphated): High-quality phosphating treatment on inner and outer walls to form a uniform dense crystal structure with strong corrosion resistance, porosity control and strong coloring ability for painting and plastic spraying.

Dimension
OD | Thickness (examples)
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
16 | 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 (max / min)
Steel grade | EN number | C (max) | Si (max) | Mn (max) | P (max) | S (max) | Total (min where shown)
E215 | 1.0212 | 0.10 | 0.05 | 0.7 | 0.025 | 0.015 | Total: 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 ranges and tolerances (examples):
4 mm - 20 mm: GB/T3639 OD ±0.10 mm; DIN2391 OD ±0.08 mm; Special OD ±0.05 mm; WT tolerances ±0.05 mm
20 mm - 30 mm: GB/T3639 OD ±0.10 mm; DIN2391 OD ±0.08 mm; Special OD ±0.08 mm; WT tolerances ±0.08 mm
31 mm - 40 mm: GB/T3639 OD ±0.15 mm; DIN2391 OD ±0.15 mm; Special OD ±0.10 mm; WT tolerances ±0.08 mm
41 mm - 60 mm: GB/T3639 OD ±0.20 mm; DIN2391 OD ±0.20 mm; Special OD ±0.15 mm; WT tolerances ±0.15 mm
61 mm - 80 mm: GB/T3639 OD ±0.30 mm; DIN2391 OD ±0.30 mm; Special OD ±0.20 mm; WT tolerances ±0.20 mm
81 mm - 120 mm: GB/T3639 OD ±0.45 mm; DIN2391 OD ±0.45 mm; Special OD ±0.30 mm; WT tolerances ±0.30 mm

Mechanical Properties
Steel grade | EN number | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%)
E215 | 1.0212 | min. 215 | 290–430 | 30
E235 | 1.0308 | min. 235 | 340–480 | 25
E355 | 1.0580 | min. 355 | 490–630 | 22

Caractéristiques / spécifications techniques

• Series / designation: DIN 2391
• Standards: EN10305-4, EN10305-1, ASTM A179
• Available steel grades: E215, E235, E355
• Outer diameter range: 4 mm – 120 mm
• Wall thickness range: 0.5 mm – 10 mm
• Length: standard 6 m or custom
• Surface treatment: internal and external phosphating
• Delivery condition: normalized (+N / NBK)
• Quality control: eddy current testing for each pipe
• Typical delivery time: 15–45 days depending on quantity and stock