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Seamless steel chrome honed tubes for gas cylinder
Grade:ST 52
Metric size:
Inside diameter from 40 to 300mm,
Max length 16m.
Straightness: 0.5 /1000Tolerance EXT: DIN 2391Tolerance INT: ISO H8Roughness(Ra): 0.2 to 0.4µ
Chrome thickness: 20 TO 50 Micron
Type:cold drawing, normalizing treatment, honing or skiving, chrome outside surface.
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 |
|
580 N/mm2 |
420 N/mm2 |
10 |
Specifications:
|
Dimension tolerance comparison Chart |
||||
|
Outer Diameter |
GB/T3639 |
DIN2391(EN10305) |
Manufacturers standard |
Special standard |
|
6-30mm |
±0.10mm |
±0.08mm |
±0.05mm |
±0.02mm |
|
31-40mm |
±0.15mm |
±0.15mm |
±0.05mm |
±0.03mm |
|
41-50mm |
±0.20mm |
±0.20mm |
±0.05mm |
±0.03mm |
|
51-60mm |
±0.25mm |
±0.25mm |
±0.08mm |
±0.03mm |
|
61-65mm |
±0.30mm |
±0.30mm |
±0.10mm |
±0.05mm |
|
Thick tolerance |
±0.12mm |
±0.10mm |
±0.05mm |
±0.03mm |
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