硬钢管 Cold Drawn Army Green Seamless Steel Pipe

碳钢DIN欧洲标准

Product Description
Product Name: Cold Drawn Army Green Seamless Steel Pipe
Standard: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391/C), 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: chromium-free VI passivation (military green)
Delivery condition: +N (NBK) normalized under controlled atmosphere
Delivery time: 15-45 days, according to the quantity and stock status
Processing services: welding, punching, cutting, bending, uncoiling

Product Advantages

• No oxide layer — No oxide layer on both sides of tube
• Surface — High precision, smooth surface
• No crack — No crack during flaring and flattening
• Anti-rust — Anti-rust on inside and outside
• Cold bending — Cold bending without deformation

Product Video / Workflow
Work flow chart:
Raw material -> Inspection (chemical analysis, physical performance, sizes) -> Cutting -> Chamfer grinding (deburring) -> Pickling -> Saponifiation -> Cold drawn / cold rolled -> Straightening -> Cleaning (Oil removal) -> Eddy current testing -> Anaerobic bright heat treatment (NBK) -> Straightening -> Dimensional accuracy and surface testing -> Eddy current testing -> Physical performance test -> Surface treatment (Chrome VI-free passivated) -> Cleaning and packaging -> Stock

Dimension
OD vs Thickness (selection examples):
OD 6mm: 6*1, 6*1.5, 6*2
OD 8mm: 8*1, 8*1.5, 8*2
OD 10mm: 10*1, 10*1.5, 10*2
OD 12mm: 12*1, 12*1.5, 12*2, 12*2.5
OD 14mm: 14*1, 14*1.5, 14*2, 14*2.5, 14*3
OD 15mm: 15*1, 15*1.5, 15*2, 15*2.5, 15*3
OD 16mm: 16*1, 16*1.5, 16*2, 16*2.5, 16*3
OD 18mm: 18*1.5, 18*2, 18*2.5, 18*3, 18*3.5, 18*4
OD 20mm: 20*1.5, 20*2, 20*2.5, 20*3, 20*3.5, 20*4
OD 22mm: 22*1.5, 22*2, 22*2.5, 22*3, 22*3.5, 22*4
OD 25mm: 25*2, 25*2.5, 25*3, 25*3.5, 25*4
OD 28mm: 28*2, 28*2.5, 28*3, 28*3.5, 28*4
OD 30mm: 30*2, 30*2.5, 30*3, 30*3.5, 30*4, 30*4.5, 30*5
OD 32mm: 32*2, 32*2.5, 32*3, 32*3.5, 32*4, 32*4.5, 32*5
OD 34mm: 34*2, 34*2.5, 34*3, 34*3.5, 34*4, 34*4.5, 34*5, 34*6
OD 35mm: 35*2, 35*2.5, 35*3, 35*3.5, 35*4, 35*4.5, 35*5, 35*6
OD 38mm: 38*2, 38*2.5, 38*3, 38*3.5, 38*4, 38*4.5, 38*5, 38*6
OD 40mm: 40*2.5, 40*3, 40*3.5, 40*4, 40*4.5, 40*5, 40*6
OD 42mm: 42*2.5, 42*3, 42*3.5, 42*4, 42*4.5, 42*5, 42*6
OD 45mm: 45*2.5, 45*3, 45*3.5, 45*4, 45*4.5, 45*5, 45*6
OD 46mm: 46*2.5, 46*3, 46*3.5, 46*4, 46*4.5, 46*5, 46*6
OD 48mm: 48*2.5, 48*3, 48*3.5, 48*4, 48*4.5, 48*5, 48*6
OD 50mm: 50*2.5, 50*3, 50*3.5, 50*4, 50*4.5, 50*5, 50*6
OD 54mm: 54*3, 54*3.5, 54*4, 54*4.5, 54*5, 54*6
OD 60mm: 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 where given):
E215 / 1.0212 / C: 0.10 / Si: 0.05 / Mn: 0.7 / P: 0.025 / S: 0.015 / Total: 0.025
E235 / 1.0308 / C: 0.17 / Si: 0.35 / Mn: 1.2 / P: 0.025 / S: 0.015 / Total: —
E355 / 1.0580 / C: 0.22 / Si: 0.55 / Mn: 1.6 / P: 0.025 / S: 0.015 / Total: —

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

Mechanical Properties
Name / Number / Yield strength ReH (min, MPa) / Tensile strength Rm (MPa) / Elongation A (% min):
E215 / 1.0212 / ReH: 215 MPa / Rm: 290–430 MPa / A: 30%
E235 / 1.0308 / ReH: 235 MPa / Rm: 340–480 MPa / A: 25%
E355 / 1.0580 / ReH: 355 MPa / Rm: 490–630 MPa / A: 22%

Caractéristiques / Spécifications techniques

• Commercial name: Cold Drawn Army Green Seamless Steel Pipe
• Standards: EN10305-4, EN10305-1, ASTM A179, (also references to DIN2391/C, DIN2445/2)
• Steel grades available: E215 (1.0212), E235 (1.0308), E355 (1.0580)
• Dimensions: OD 4–120 mm ; Wall thickness 0.5–10 mm ; Typical lengths fixed 6 m or per request
• Surface treatment: Chromium VI-free passivation (military/army green)
• Delivery condition: +N (NBK) normalized under controlled atmosphere
• Delivery time: 15–45 days depending on quantity and stock
• Processing services: welding, punching, cutting, bending, uncoiling
• Key quality points: no oxide layer, high precision smooth surface, no crack during flaring/flattening, anti-rust internal/external, suitable for cold bending without deformation
• Mechanical ranges: ReH 215–355 MPa (depending on grade); Rm up to 630 MPa; Elongation 22–30% depending on grade