September 1994

DIN 2394 Part 2

Welded and sized precision steel tubes
Technical delivery conditions

ICS 23.040.10

Supersedes August 1981 edition.

Descriptors: Tube, steel tube, precision tube, technical delivery conditions.

GeschweiBte maBgewalzte Prazisionsstahlrohre; technische Lieferbedingungen

In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.

Dimensions in mm

1 Scope and field of application

1.1 This standard specifies technical delivery conditions for welded and sized precision steel tubes of the dimensions listed in DIN 2394 Part 1, which are made from the steel grades listed in clause 4.
Such tubes are mainly used where accuracy to size and, possibly, a small wall thickness, a particular surface condition and specific mechanical properties are required.

1.2 This standard does not cover:

• a) the quantity, in metres;
• b) a reference to this standard;
• c) the quality grade;
• d) the steel grade;
• e) the final supply condition;
• f) the outside and wall thickness;
• g) the type of tube length to be supplied;
• h) any inspection document agreed upon.

Designation for 1 000 m welded precision steel tubes, made of RSt 37-2 steel, welded and sized (BKM), with an outside diameter, D, of 40 mm and a wall thickness, T, of 1,5 mm, in random lengths:

1000 m tube DIN 2394 — RSt 37-2 BKM — 40x1,5

Designation for 1 000 m quality grade С welded precision steel tubes, made of RSt 37-2 steel, normalized (NBK), with an out-side diameter, D, of 40 mm and a wall thickness, T, of 1,5 mm, in exact lengths of 4 000 mm, where the interior burr has been removed by cutting (IG):

1000 m tube DIN 2394 — С — IG — RSt 37-2 NBK — 40x1,5x4000

Designation for 1 000 rn quality grade С welded precision steel tubes, made of St 37.8 steel, normalized (NBK), with an outside diameter, D, of 20 mm and wall thickness, T, of 1,5 mm, in exact lengths of 4 000 mm, produced to the limit deviations specified in DIN 2394 Part 1, complying with the technical delivery conditions specified in DIN 17177 and supplied with type 3.1.В inspec-tion certificate as specified in DIN 50 049:

1000 m tube DIN 2394 — С — 20x1,5x4000 — DIN 17177 — St 37.8 NBK — 3.1.B

Unless otherwise specified, tubes shall be supplied in quality grade A and in lengths as specified in subclause 9.3.

4 Materials

The tubes shall be manufactured from electric steel or basic oxygen steel, the melting and casting processes being at the discretion of the manufacturer.
The steel shall be cast as killed steel. If a particular deoxidation procedure is requested, this shall be agreed upon at the time of ordering. Table 1 lists relevant steel grades.

Table 1: Steel grades