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Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
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TORICH INTERNATIONAL LIMITED |
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St35 St52 1026 Pre-Honed Seamless Precision Steel Tube Din 2391
Torich can produce seamless high precision steel pipe for over 20 years',are of great engineering experience
in steel pipe industry for more than 20 years, which are in great command of production technology for Cold
Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.
DIN 2391 Material Properties
DIN 2391 equivalent ASTM Standard EN 10305-1, EN 10305-4, ASTM A519, NF 699, GOST 9567-75, NBR 8476,
BS 6323 Part 4, NF A 49-330-85, BS 6323-4
DIN 2391 ST52 Pre-Honed Seamless Precision Steel Tube mechanical Properties
| Mechanical properties at room temperature | ||||||||||
| Steel Grade | Minimum values for the delivery condition | |||||||||
| BKW | BKS | GBK | (+N) NBK | |||||||
| ST35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 340-470 | 235 | 25 |
| ST45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 440-570 | 235 | 21 |
| ST52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490-630 | 355 | 22 |
ST52 Steel Tube properties of Pre-Honed Seamless Precision Steel Tube
DIN 2391 ST52 Chemical Composition Steel Grade and Chemical Compositions:
| Steel Grade | C | Si | Mn | P | S |
| max | max | max | max | ||
| ST35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST52 | 0.22 | 0.35 | ≥1.60 | 0.025 | 0.025 |
ST52 steel tube equivalent are EN10025-1994 1.0570 S355, DIN 2393 & 2394 1.0570 ST 52-3 and DIN 2391-2
1.0580 ST 52. ST52 steel tubes are high strength structural steel, low alloy.
DIN 2391 ST52 pipe properties is that of a Chemical Composition of P max 0.025, C ≤0.22, Mn ≤1.6, Si ≤0.55 and S
max 0.025. DIN 2391 ST52 pipes have a Tensile Strength of 600 Mpa Min. The Yield Strength of DIN 2391 ST52 pipes
is 520 Mpa Min. DIN 2391 ST52 pipes have an Elongation of 14% min.
Tip:
Honing pipe: the cold-rolled precision seamless steel pipe is a hydraulic steel pipe made of finished seamless steel pipe or
raw seamless steel pipe, after acid pickling, phosphating, saponification treatment, and then rolled by the cold-rolled pipe mill.
The precision of hydraulic steel pipe is very high, which can generally be controlled at 0. 02-0. Within 05mm, the standard is
gb3639-83, the allowable deviation of inner diameter is 0.03mm, and the inner surface roughness is ra 0.2 ~ 0.8 μ m.
Straightness of hydraulic steel pipe: 0.3 ~ 1.5mm/m, which is specially used as the barrel diameter of oil steel.
Weight of seamless steel pipe kg/m = (OD - WT) * wt * 0.02466, where OD is the outer diameter and WT is the wall thickness
(: (outer diameter - wall thickness) * wall thickness *0.02466 kg / m.
