GB/T3639 Round Seamless Cold Rolled Steel Tubes For Precison Application
Product Details
seamless steel pipe
,seamless carbon steel tube
GB/T3639 Seamless Cold Drawn Or Cold Rolled Steel Tubes For Precison Application
Cold Rolled Steel Tubes
Steel Grade/Steel Material:10#, 20#, 45#, Cr-Mo alloy, 16Mn, SAE1010, SAE1020, SAE1045, SKTM11,37Mn5,40Cr, ST35, ST52 etc
Steel pipe standard:GB8713, GB3639, DIN2391, EN10305-1, EN10305-4, JIS-G3445, ASTM A519, ASTM A192, ASTM A179
size:
OD:10.00—110.00mm
WT:1.00—8.00mm
Length: 5.8m, 6m,9m,or as required.
Production Processs:
RAW MATERIAL
↓
INCOMING INSPECTION
↓
STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN
↓
ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING
↓
FINAL INSPECTION→BUNDING→STORAGE
| steel | Tensile StrengthonN/mm2 | YieldosN/mm2 | Elongations% | Hardness HB |
| 20# | 530 | 505 | 12 | 175 |
| 16Mn | 595 | 575 | 9 | 190 |
| 27SiMn | 840 | 805 | 7.5 | 230 |
| 35# | 610 | 575 | 6 | 207 |
| 45# | 660 | 630 | 9 | 190 |
Technique:
1) Hot Rolled
2) Cold Drawn
3) Cold Rolled
Characteristic:
Good concentricity
Good OD and ID tolerance
High Precision
Stable quality
Smooth Roughness
TORICH QUALITY ASSURANCE
Application:
1) shock absorber for motorcycle and automobile
2) hydraulic gas cylinder
3) precision machine precision pipe part
4) other auto pipe parts
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