10305-3 Welded Cold Sized Steel Tube

BSI – BS 10305-3 Specification for welded cold sized steel tubes for automobile, mechanical and general engineering purposes – Specific requirements for cold sized Welded Steel Tubes. cold sized welded tubing possesses a high strength-to-weight ratio and can be processed to provide a combination of desired characteristics: dimensional accuracy; good surface quality; excellent micro-structure uniformity; good machinability; and high tensile properties. It is also suited for such post-treatments as carburizing and heat treating.

Benefits Of 10305-3 Welded Steel Tubes

Higher Strength & Hardness Properties

Size Accuracy

Enhanced Appearance

Uniform Micro-structure

Easier To Machine

Superior Finish In Subsequent Manipulations

10305-3 Welded Steel Tubes Applications

1.Hydraulic Cylinders

2.Auto and Truck Axles

3.Suspension parts and shock absorbers

4.High Speed Shafts and rollers

5.Bearings and Spacers

6.Roll cages

7.Agricultural components and many other machined tubular parts.

Standards

BS EN 10305-3 specific requirements for cold sized Welded Steel Tubes

10305-3 Welded Steel Tubes Chemical Component

Steel name	Steel number	C	Si max.	Mn max.	P	S
E155	1.0033	0,11	0,35	0,70	0,025	0,025
E190	1.0031	0,10	0,35	0,70	0,025	0,025
E195	1.0034	0,15	0,35	0,70	0,025	0,025
E220	1.0215	0,14	0,35	0,70	0,025	0,025
E235	1.0308	0,17	0,35	1,20	0,025	0,025
E260	1.0220	0,16	0,35	1,20	0,025	0,025
E275	1.0225	0,21	0,35	1,40	0,025	0,025
E320	1.0237	0,20	0,35	1,40	0,025	0,025
E355	1.0580	0,22	0,55	1,60	0,025	0,025
E370	1.0261	0,21	0,55	1,60	0,025	0,025
E420	1.0575	0,16	0,50	1,70	0,025	0,025

10305-3 Welded Steel Tubes Mechanical Property

Steel name	Steel number	+CR1		+A		+N
		Rm	A	Rm	A	Rm	ReH	A
		MPa	%	MPa	%	MPa	MPa	%
E155	1.0033	290	15	260	28	270 to 410	155	28
E195	1.0034	330	8	290	28	300 to 440	195	28
E235	1.0308	390	7	315	25	340 to 480	235	25
E275	1.0225	440	6	390	21	410 to 550	275	21
E355	1.0580	540	5	450	22	490 to 630	355	22

10305-3 Welded Steel Tubes Delivery Condition

Welded and cold sized +CR1 Normally not heat treated, but suitable for final annealing.+CR2 Not intended for heat treatment after the welding and sizing process

Annealed +A After the welding and sizing process the tubes are annealed in a controlled atmosphere.

Normalized +N After the welding and sizing process the tubes are normalized in a controlled atmosphere. This delivery condition can be reached via direct processing.

10305-3 Welded Steel Tubes Annealing Process

Annealing is used to soften the metal before further cold working or fabrication processes, and improves the overall metallurgical microstructure of the tube. During tube reduction or cold drawing, it can become hard and somewhat brittle. To be able to draw the tube again, stresses formed during cold working need to be removed to return the material to its normal state.

During annealing the tube is heated to a controlled temperature (up to 2100°F) and soak time. Through this process the tube remains in shape, but the grains in the structure of the tube reform into a regular unstressed pattern. The resulting annealed tube is softer and suitable for redrawing.

10305-3 Welded Steel Tubes Manufacturing process

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 Possible surface conditions are:

—S1 (black);

—S2 (pickled);

—S3 (cold rolled);

—S4 (coated to an agreed condition).

10305-3 Welded Steel Tubes Packaging

Straight lengths of welded tubing can be individually sleeved in paper or plastic and/or packaged in our unique cardboard spacers to ensure no damage occurs during transit. Coiled welded tubes are horizontally packed using paper or cardboard separators to prevent tube-to-tube contact. All tubing is packed in either wooden crates lined with wax craft paper, tri-wall clay-coated reinforced cases, or standard cardboard boxes. Plastic end caps that prevent foreign material from getting inside the tubes are also available upon request.

Other Services

1 Cutting: Small pieces

2 End: Plaint or Beveled or threaded

3 CNC Machine: Produce as your drawing

4 Package: Bare/Nylon/Canvas/Wooden

5 Payment:T/T, L/C, O/A(request credit)

6 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)

Contact Fushun 10305-3 Welded Steel Tubes Today

Contact us for more information regarding precision steel tubing specifications and product options, or request a quote for further pricing details today.