Specifications

schedule 40 steel pipe roughness
1. ID 50-250mm
2. Max length 20 meters.
3.Technology:Cold drawn
4.High

schedule 40 steel pipe roughness

HONED TUBE

 QUICK DETAILS:

l        Grade:ST 52,stainless steel, alloy steel and special steel

l        Metric size:

l        Inside diameter from 40 to 1000mm (skiving tube ID max 500mm),

l        Max length 20m.

l        Straightness: 0.5 /1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8
Roughness(Ra): 0.2 to 0.4µ

l        Type:cold drawing, normalizing treatment, honing or skiving.

CHEMICAL COMPOSITION (%)

Si (Max)	Mn (Max)	C (Max)	P (Max.)	S (Max)
0.55	1.60	0.22	0.025	0.025

MECHANICAL PROPERTIES

Tensile strength Min	Yield Point Min	Elongation % Min
630 N/mm2	560 N/mm2	10

Production Process:

• Pretreatment : Pickling­—Phosphating—Saponification

 

 

 

• Cold drawn/cold rolled

 

 

• Annealing furnace——+SR

 

 

• Straightener—— Straightening

 

 

•  Straightness inspecting

 

 

• Dimension inspecting

 

  

 

• Sawing

 

 

 

• Lathe

 

 

• Polishing

 

 

• Products inspecting

 

 

• Finished Products

 

 

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