EN 10305-3 E320 1.0237, Steel tubes for precision applications Part 3: Welded cold sized tubes, CDW Steel Tubes, BS 6323-6 CEW 1 E155, BS 6323-6 CEW 2 E195, DIN 2394 RSt34-2 E195, NF A49-646 ES185 E195, NF A49-646 ES200 E220, BS 6323-6 CEW 4 E235, DIN 2394 RSt37-2 E235, NF A49-646 ES235 E235, NF A49-646 ES250 E260, BS 6323-6 CEW 4 E275, DIN 2394 St44-2 E275, NF A49-646 ES275 E275, NF A49-646 ES320 E320, BS 6323-6 CEW 5 E355, DIN 2393 St52-3 E355, NF A49-646 ES355 E355, NF A49-646 ES380 E370, NF A49-646 ED420 E420

EN 10305-3 Steel tubes for precision applications Part 3: Welded cold sized tubes

Standard: EN 10305-3
Equivalent Standards: DIN 2393, DIN 2394, NF A49-646, BS 6323-6

Material: E320, 1.0237
Equivalent Materials: ES320, E275

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %
0.20 max	0.35 max	1.40 max	0.025 max	0.025 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Delivery Condition
410 min	320 min	19 min	+CR2

EN 10305-3 specifies the technical delivery conditions for welded cold sized steel tubes of circular cross section for precision applications. It can also be applicable to non-circular (excluding square and rectangular) cross sections. Tubes according to EN 10305-3 are characterized by having precisely defined tolerances on dimensions and a specified surface roughness. Typical fields of application are in the vehicle, furniture and general engineering industries.

Manufacture: the tubes shall be manufactured from steel strip by electric welding. The tubes shall not include welds used for joining lengths of flat rolled strip prior to forming the tube, except for coiled tubes which may be supplied in the delivery conditions +A and +N. Surface conditions: S1 (black); S2 (pickled); S3 (cold rolled); S4 (coated to an agreed condition). The surface conditions S1 and S3 apply for the strip. The surface condition S2 and S4 may apply for the strip or the tube.
Delivery Condition: tubes made of the steel grades E155, E195, E235, E275 and E355 shall be supplied in the delivery condition +CR1 or +A or +N; tubes made of the grades E190, E220, E260, E320, E370, E420 and S500MC shall be supplied in the delivery condition +CR2.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check.

Length: 5800mm; 6000mm; 10000mm; 11800mm; and so on.
Further process: cutting, deformation.

Keyword: precision steel tube, EN 10305-3, precision steel tube, CDW steel tube, high precision, cng tube, HPL Tube

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