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Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd.
Zhangjiagang Bonded Area Yaxin Precision Tube Co., Ltd. Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd. Steel Tubing for Automotive Powertrain, Shock Aborber, Steering And Steel Tubing for Heat
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DIN2391 Cold Drawn Precision Steel Tubing Bright Annealed Seamless Steel Tube

Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd.
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DIN2391 Cold Drawn Precision Steel Tubing Bright Annealed Seamless Steel Tube

Brand Name : YAXIN
Certification : TS16949, ISO9001, OHSAS18001
Place of Origin : China
MOQ : 1000kg
Payment Terms : L/C, T/T
Supply Ability : 500 metric tons per month
Delivery Time : 30 days
Packaging Details : Wooden case
Material : ST35, ST37, ST37.4, ST45, ST52, ST52.4
Shape : Round
Type : seamless precision tube
Condition : +N, +C, +A, +SR
SURFACE : Bare Tube (No coating)
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Cold Drawn Seamless Precision Steel Tube , DIN 2391 St35 St37, St45, St52 Bright Annealed Tube


Brief Introduction:

Standard: DIN 2391 EN10305-1, EN10305-4, BS 6323, ISO 8535

Grade: St 30 Si / St 30 Al / St 35 / St37 / St37.4 / St45 / St 52 / St52.4 / E215 / E235 / E355
Out Dimensions: 6 mm ~ 350 mm
Wall Thickness: 0.8 mm ~30mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)


Precision steel tube
Precision in size,Bright surface, high mechanical performance

Standard: DIN 2391, EN10305-1, EN10305-4, BS 6323, ISO 8535

STEEL GRADE: ST30Si, ST30Al, ST35, ST37, ST37.4, ST45, ST52, ST52.4, etc


SURFACE TREATMENTS

1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface 0.35Ra Maximum for special requirement

2. Surface Coating

A. Silver galvanized

B. Yellow galvanized

C. Olive green coated

Layer thickness: 8-20um, Salty Spray Test: 48-150 hours

3. Black phosphate


APPLICATIONS

1. Automotive industry

A. Fuel injection lines/nozzles

B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar

C. Drive transmission: Steering column elements

D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts

2. Hydraulic Fields

A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension

B. Hydraulic cylinders (HPZ)


Chemical Composition:

Steel gradeChemical composition, as a percentage by mass
SymbolMaterial numberC
max.
Si
max.
MnP
max.
S
max.
St 30 Si1.02110.100.30<=0.550.0250.025
St 30 Al1.02120.100.05<=0.550.0250.025
St 351.03080.170.35<=0.400.0250.025
St 451.04080.210.35<=0.400.0250.025
St 521.05800.220.55<=1.600.0250.025
The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%.

Final supply conditions:

DesignationSymbolDescription
Cold finished (hard)BKTubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft)BKWThe final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relievedBKSHeat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
AnnealedGBKThe last cold forming process is followed by annealing in a controlled atmosphere.
NormalizedNBKThe last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Condition on delivery:

Steel GradeBKBKWGBKNBK
Code No.

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min
St30 Si40083301228030290-42030
St30 Al40083301228030290-42030
St 3544063701031525340-47025
St 455405470839021440-57021
St 525904540749022490-63022

Competitive Advantage:

Yaxin Precision Tube Co., Ltd.

Leading precision steel tube supplier in the global market, yield 70,000 tons per year based on both seamless tubing and welded tubing. 100% of tubing is used on automotive industry and hydraulic system.


Product Tags:

seamless carbon steel tube

      

welding round tubing

      
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