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Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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DIN2391 ST52 Seamless Carbon Steel Pipe For Excavator Hydraulic Pump System
Torich is a manufacturer of precision carbon steel tube for over 20 years.have lots of experiences on manufacturing and exporting steel pipes.
Standard as per DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.
Similar standard and material as below.
JIS G3445 STKM 11A C STKM11A C C STKM 12A B C STKM14 A B C STKM 13 A B C STKM 15A B C
STKM 16A C STKM 18 A C STKM 19A STKM20A
ASTM A512 A513 A519 A312
BS 1717 6323 ERW C1 ERWC2 HFS3 CEWC2 CFSC3 CFS3 CFS3A ERWC3 CFSC4 CFS4 HFS4 HFS5
DIN 2391DIN 2393DIN 2394
NF 49-322 NF49-327 NF49-324 NF49-330 NF49-343
ISO 3304 ISO3305 ISO3306 ISO3304 ISO3305 ISO3306 ISO2937
Size: OD 0.5-15mm, WT4.0-80 mm
Tolerance: Outer Diameter: +/- 0.05mm
Thickness: +/- 0.05mm OR as Customer Request
Length max 12000mm
Cutting Length available.
Max length 5.8 for 20ft container
Max length 11.8m for 40ft container
Technical Standard:
DIN2391, DIN2394
EN10305-1, EN10305-2, EN10305-4
Steel Grade: St35, ST37, ST37.4, ST45, ST52
Chemical Composition
| Standard | Grade | Chemical Components (%) | |||||
| Symbol | Material No. | C | Si | Mn | P | S | |
| DIN2391 | St 30 Si | 1.0211 | ≤0.10 | ≤0.10 | ≤0.55 | ≤0.025 | ≤0.025 |
| St 30 Al | 1.0212 | ≤0.10 | ≤0.05 | ≤0.55 | ≤0.025 | ≤0.025 | |
| St 35 | 1.0308 | ≤0.17 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St 5 | 1.0408 | ≤0.21 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St 52 | 1.058 | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.025 | |
Mechanical Properties.
| Mechanical properties at room temperature | |||||||||||||
| Steel Grade | Minimum values for the delivery condition | ||||||||||||
| Steel Name | Steel Number | BK | BKW | BKS | GBK | NBK | |||||||
| Rm | A % | Rm | A % | Rm | ReH | A % | Rm | A % | Rm | ReH | A % | ||
| Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | |||||||
| St 30 Si | 1.0211 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 420 | 215 | 30 |
| St 30 Al | 1.0212 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 420 | 215 | 30 |
| St 35 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340 to 470 | 235 | 25 |
| St 45 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440 to 570 | 255 | 21 |
| St 52 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490 to 630 | 355 | 22 |
Delivery Condition
Cold finished (hard) BK(+C) Tubes do not undergo heat treatment following the final cold forming and, thus, have a
rather high resistance to deformation
Cold finished (Soft) BKW (+LC) The 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-relieved BKS(+SR) Heat 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.
Annealed GBK(+A) The last Cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK(+N) The last cold forming process is followed by annealing above the upper transformation point
in a controlled atmosphere.
Surface:
1) NBK (Bright Annealed)
2) Galvanization/Galvanized/Zinc Coated
3) Blue White Zinc (Trivalent Chromium Passivation)
4) Plating Colour Zinc(Trivalent Chromium Passivation)
5) Yellow, Army-Green
6) Phosphated/Black Phosphated
7) Smooth outer and inner surface
Applications
1: for Car Fuel Oil
2: for Automotive Fuel Oil
3: for Injection Molding Machine
3: for Screw Air Compressor
4: For Excavator Hydraulic Pump System
5: for Air pneumatic Brake System
