Tubería rígida de acero DIN 2391

conforme a las normas ASTMDINnorma 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: 4-120mm, WT: 0.5-10mm
Length: fixed 6m or as your request
Surface Treatment: Phosphating – External phosphating coating
Delivery condition: +N (NBK) normalized under a controlled atmosphere
Delivery time: 15-45 days, according to the quantity and stock

Product Advantages

• Anti-rust: High anti corrosion & anti rust
• Total phosphating: Phosphating inside and outside of steel pipe
• Delicate: The phosphated coating is delicate, high lubricity, uniform color
• Exterior: Good looking in appearance
• Painting: Suitable for painting, and have strong (paint adhesion/coloring)

Product Video — key process & features

• 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): Vacuum annealing with protective gases to maintain rolling accuracy, surface smoothness, and provide excellent mechanical properties and metallographic structure
• Surface treatment (phosphated): High-quality phosphating on inner and outer walls forming a uniform, dense crystal structure with strong corrosion resistance, porosity control and strong coloring ability for painting/plastic spraying

Dimension
OD — Available wall thickness options (format: diameter: thicknesses)
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
E215 (1.0212): C max. 0.10; Si max. 0.05; Mn max. 0.7; P max. 0.025; S max. 0.015; Total min. 0.025
E235 (1.0308): C max. 0.17; Si max. 0.35; Mn max. 1.2; P max. 0.025; S max. 0.015; Total —
E355 (1.0580): C max. 0.22; Si max. 0.55; Mn max. 1.6; P max. 0.025; S max. 0.015; Total —

Tolerance
Outer Diameter allowable tolerance (GB/T3639 / DIN2391) and special tolerance (OD / WT):
4mm-20mm: Allowable ±0.10mm (GB/T3639), DIN2391 ±0.08mm; Special tolerance OD ±0.05mm; WT ±0.05mm
20mm-30mm: Allowable ±0.10mm, DIN2391 ±0.08mm; Special tolerance OD ±0.08mm; WT ±0.08mm
31mm-40mm: Allowable ±0.15mm, DIN2391 ±0.15mm; Special tolerance OD ±0.10mm; WT ±0.08mm
41mm-60mm: Allowable ±0.20mm, DIN2391 ±0.20mm; Special tolerance OD ±0.15mm; WT ±0.15mm
61mm-80mm: Allowable ±0.30mm, DIN2391 ±0.30mm; Special tolerance OD ±0.20mm; WT ±0.20mm
81mm-120mm: Allowable ±0.45mm, DIN2391 ±0.45mm; Special tolerance OD ±0.30mm; WT ±0.30mm

Mechanical Properties
E215 (1.0212): Yield strength (min) 215 MPa; Tensile strength 290–430 MPa; Elongation 30%
E235 (1.0308): Yield strength (min) 235 MPa; Tensile strength 340–480 MPa; Elongation 25%
E355 (1.0580): Yield strength (min) 355 MPa; Tensile strength 490–630 MPa; Elongation 22%

FAQ — selected commercial/product terms (no contact details)

• Samples: Samples can be provided; customer pays sample fee and shipping in advance. After order placement the sample fee may be refunded according to supplier policy.
• Samples production: Samples can be produced or manufactured from technical drawings.
• Payment terms (example): For orders ≤ $1000, 100% prepayment; for orders ≥ $1000, 30% T/T in advance, balance before shipment.
• Delivery terms: EXW, FOB, CFR, CIF, DDU.
• Factory visits: Visits can be arranged according to schedule.

Caractéristiques / spécifications techniques

• Standards: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391), ASTM A179
• Steel grades available: E215 (1.0212), E235 (1.0308), E355 (1.0580)
• Diameter range OD: 4–120 mm
• Wall thickness range WT: 0.5–10 mm (multiple standard thickness options per diameter as listed)
• Length: fixed 6 m or customizable
• Surface treatment: Internal and external phosphating (black phosphated / phosphating coating)
• Delivery condition: +N (NBK) normalized under controlled atmosphere; NBK vacuum/anaerobic bright heat treatment available
• Quality control: Eddy current testing for flaw detection on each pipe
• Typical mechanical properties: Yield 215–355 MPa (depending on grade), tensile 290–630 MPa, elongation 22–30% (depending on grade)