Tubo rígido em aço DIN 2391

conforme normas ASTMDINnorma europeia

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 strong coloring ability for painting/plastic spraying

Product Video / Production & Tests
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 protective heating, heat preservation and controlled cooling. Maintains rolling accuracy and smoothness of the steel pipe, with excellent mechanical properties and metallographic structure.
Surface treatment (phosphated): High-quality phosphating on inner and outer walls forms a uniform and dense crystal structure, providing strong corrosion resistance and porosity, and strong coloring ability during painting and plastic spraying.

Dimension
OD 6: 6*1; 6*1.5; 6*2
OD 8: 8*1; 8*1.5; 8*2
OD 10: 10*1; 10*1.5; 10*2
OD 12: 12*1; 12*1.5; 12*2; 12*2.5
OD 14: 14*1; 14*1.5; 14*2; 14*2.5; 14*3
OD 15: 15*1; 15*1.5; 15*2; 15*2.5; 15*3
OD 16: 16*1; 16*1.5; 16*2; 16*2.5; 16*3
OD 18: 18*1.5; 18*2; 18*2.5; 18*3; 18*3.5; 18*4
OD 20: 20*1.5; 20*2; 20*2.5; 20*3; 20*3.5; 20*4
OD 22: 22*1.5; 22*2; 22*2.5; 22*3; 22*3.5; 22*4
OD 25: 25*2; 25*2.5; 25*3; 25*3.5; 25*4
OD 28: 28*2; 28*2.5; 28*3; 28*3.5; 28*4
OD 30: 30*2; 30*2.5; 30*3; 30*3.5; 30*4; 30*4.5; 30*5
OD 32: 32*2; 32*2.5; 32*3; 32*3.5; 32*4; 32*4.5; 32*5
OD 34: 34*2; 34*2.5; 34*3; 34*3.5; 34*4; 34*4.5; 34*5; 34*6
OD 35: 35*2; 35*2.5; 35*3; 35*3.5; 35*4; 35*4.5; 35*5; 35*6
OD 38: 38*2; 38*2.5; 38*3; 38*3.5; 38*4; 38*4.5; 38*5; 38*6
OD 40: 40*2.5; 40*3; 40*3.5; 40*4; 40*4.5; 40*5; 40*6
OD 42: 42*2.5; 42*3; 42*3.5; 42*4; 42*4.5; 42*5; 42*6
OD 45: 45*2.5; 45*3; 45*3.5; 45*4; 45*4.5; 45*5; 45*6
OD 46: 46*2.5; 46*3; 46*3.5; 46*4; 46*4.5; 46*5; 46*6
OD 48: 48*2.5; 48*3; 48*3.5; 48*4; 48*4.5; 48*5; 48*6
OD 50: 50*2.5; 50*3; 50*3.5; 50*4; 50*4.5; 50*5; 50*6
OD 54: 54*3; 54*3.5; 54*4; 54*4.5; 54*5; 54*6
OD 60: 60*3; 60*3.5; 60*4; 60*4.5; 60*5; 60*6; 60*8

Chemical Composition
Name / Number / C (max.) / Si (max.) / Mn (max.) / P (max.) / S (max.) / Total (min.)
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 ranges and tolerances:
4mm-20mm — Allowable tolerance (GB/T3639): ±0.10mm; DIN2391: ±0.08mm; Special OD tolerance: ±0.05mm; Special WT tolerance: ±0.05mm
20mm-30mm — Allowable tolerance (GB/T3639): ±0.10mm; DIN2391: ±0.08mm; Special OD tolerance: ±0.08mm; Special WT tolerance: ±0.08mm
31mm-40mm — Allowable tolerance (GB/T3639): ±0.15mm; DIN2391: ±0.15mm; Special OD tolerance: ±0.10mm; Special WT tolerance: ±0.08mm
41mm-60mm — Allowable tolerance (GB/T3639): ±0.20mm; DIN2391: ±0.20mm; Special OD tolerance: ±0.15mm; Special WT tolerance: ±0.15mm
61mm-80mm — Allowable tolerance (GB/T3639): ±0.30mm; DIN2391: ±0.30mm; Special OD tolerance: ±0.20mm; Special WT tolerance: ±0.20mm
81mm-120mm — Allowable tolerance (GB/T3639): ±0.45mm; DIN2391: ±0.45mm; Special OD tolerance: ±0.30mm; Special WT tolerance: ±0.30mm

Mechanical Properties
Steel grade / Number / Yield strength (min., MPa) / Tensile strength (MPa) / Elongation (% min.)
E215 / 1.0212 / Yield: 215 MPa (RH min.); Tensile: 290 to 430 MPa; Elongation: 30%
E235 / 1.0308 / Yield: 235 MPa; Tensile: 340 to 480 MPa; Elongation: 25%
E355 / 1.0580 / Yield: 355 MPa; Tensile: 490 to 630 MPa; Elongation: 22%

Caractéristiques / spécifications techniques

• Product name: DIN 2391 phosphating precision seamless steel pipe
• Standards: EN10305-4, EN10305-1, ASTM A179
• Steel grades available: E215, E235, E355
• Outer diameter range: 4–120 mm
• Wall thickness range: 0.5–10 mm (various standard combinations listed above)
• Length: standard fixed 6 m or per request
• Surface treatment: internal and external phosphating
• Delivery condition: +N (NBK) normalized under controlled atmosphere
• Testing: Eddy current flaw detection on each pipe
• Typical delivery lead time: 15–45 days depending on quantity and stock