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Motorcycle Front Fork DIN 2393 Carbon Steel Seamless Welded Pipe
Description:
Outside diameter : EN 10305-2 (DIN 2393)
Version : +C (BK) No heat treatment after cold drawning (for bending see NBK version)
The kind of tube is in confined restrictions to form it cold.
Straightness : Outside diameter > 15 mm = max 0,25% deviation of the length
Outside diameter 6 - 15 mm = straightened to the eye
Outside diameter < 6 mm = no guarantee for straightness
Lengths : Random 5-7 meters, cut on request
Straightness ≤0.5mm/1m
Roundness ≤0.5
OD range:15-200mm WT range: 0.8-16mm
OD tolerance:+/-0.06mm WT:(+/-0.03)
ID surface:≤0.4μm
Feature: High precision,Nice inner hole surface
Grade and comparison
| DIN Norms:DIN 2393 | EN Norms:EN 10305-2 | UNI Norms:UNI 7946 |
| RSt 34.2 | E195 | Fe320 |
| RSt 37.2 | E235 | Fe360 |
| St 52.3 | E355 | Fe490 |
DIN 2393 limit deviations for the diameter of heat treated tubes
| Wall thickness T | Limit deviaions for diameter,D |
| 0.05 D and above | As specified in table 2. |
| Above 0.05 D | 1.5 times the values in table 2. |
| Above 0.025 |D | Twice the values in table 2. |
The limit deviations for diameters given in table 2 allow for ovality and apply for the cold finished Hare BK and cold
finished soft BKW conditions.
Application:
Motorcycle front fork ,Motor outer shell,Automobile shock absorber cylinder,Dust cover,Automobile shock absorber
reservior,refrigaretion gas reservior
Production process : Material incoming inspection Surface treatment,Cold rolling Inspection,Rust preventive work,
Warehouse storage .
Standard relative information:
Din 2393 this standard specifies dimensions for welded precision steel tubes and is to be used in conjuction with
Din 2393 part2 which states the relevant technical delivery conditions, The preferred sizes listed in table 2 are
mainly used in mechanical and automotive engineerig.
Where steel tubes of dimensions specified in this standrad are to comply with the technical delivery conditions
listed in subclause 1.2 of din 2393 part2,they shall be ordered in quality grade C.
Dedignation:
Designation of a welded precision steel tube,made of St52-3 steel,with an outside diameter,D of 18mm and an inside
diameter D1 of 13mm (ID13),cold finished (Hard)(BK):
Tube DIN 2393-St52-3 BK 18XID13
Designation of a welded precision steel tube,made of St52-3 steel,with an outside diameter,D of 18mm and a wall thickness
T,of 2.5mm ,cold finished (hard)|(BK):
Tube DIN 2393-St52-3 BK 18X2.5
Designation of a welded precision steel tube,made of St52-3 steel,with an outside diameter,D of 13mm and a wall thickness
T,of 2.5mm ,cold finished (hard)|(BK):
Tube DIN 2393-St52-3 BK 13X2.5
Designation of a welded precision steel tube,made of St37.8 steel,quanlity grade C,with an outside diameter,D of 25mm and
a wall thickness T,of 1.5mm ,normalized(NBK),complying with the techenical delivery conditions specified in DIN171777:
Tube DIN 2393 -C-25x1.5-DIN17177-St37.8 NBK
