Seamless Cold Drawn Hydraulic Steel Tube EN 10305-4
A wide range seamless cold drawn hydraulic steel tubes for hydraulic and pneumatic purposes.
According to the following norm and grades:
- EN 10305-4 E235+N / E355+N phosphate
- EN 10305-4 E235+N / E355+N Cr6 free zinc plated
Available from stock from OD 4 mm up to 273 mm in many different wall thickness.
Description
Materials: E235 + N (ST 37.4 normally annealed - NBK), all tubes undergo eddy current or ultrasound testing, tolerances in accordance with DIN 2391, quality grade C, operating pressure in accordance with DIN 2413
Manufacturer lengths: 6 m ±1 m
Temperature range: -40°C bis +400°C (from +120°C notice pressure reductions)
DIN 2391 Seamless precision steel pipes for Hydraulic system-ST 35, ST 45, ST 52 in BK and BK+S
DIN 2393 DOM steel tube for mechinery
ASTM A513 Seamless precision steel pipe
ASTM A519 Seamless precision steel pipe-1020, 1020,1045
EN10305-1 Seamless precision steel pipe for machinery use
EN10305-2 Welded precision steel pipe for oil cylinder tube
EN 10305-4 hydraulic bending precision seamless steel tubes
JIS G3473 STC J70
GB8713-88 10#,20#,35#,45#
DIN 1630
DIN 2445
GOST 9567-75
GOST 8734-75
GOST 8733-74
Mechanical Tubing: EN 10305-3, BS 6323 Part 5, DIN 2394
Cold Drawn Welded Tubes: EN 10305-2, BS 6323 Part 6, DIN 2393
Standard Met︰ Synopsis of Process Routing: quality carbon steel → cold drawing → bright heat treatment without oxidization (NBK status) → nondestructive testing. In the wall honing and inside flushing under the high pressure→. Antirust oiling outside surface→plastic capping on both ends
Main Features: high accuracy, excellent brightness, no oxidization on the outer and inner walls after heat treatment, high cleanness inside wall. The steel tube is able to stand high pressure. No deformation after cold bending, no crack after flaring and flattening . The complicated geometrical forming and machining can be realized. Color of tube: gray with white.
Main Application: to be used in hydraulic system, automobile and in the occasion where the high precision, brightness, cleanness and mechanical properties of the tube are required.
Seamless cold-drawn precision steel pipes E235N (St 37.4) and E355N (St. 52.4) according to the EU’s EN 10305-4 standard
a) E235N (St 37.4) – NBK – Normalized, phosphated and oiled inside and outside
b) E235N (St 37.4) – NBK/ZN – Normalized, electric zinc plated with Cr-VI-free passivation
c) E355N (St 52.4) – NBK – Normalized, phosphated and oiled inside and outside
d) E355N (St 52.4) – NBK/ZN – Normalized, electric zinc plated with Cr-VI-free passivation
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