304 304L Stainless Steel Square Tubes

Standards:

Grade	GB	ASTM	JIS	ISO	EN
304 ss square tubing	06Cr19Ni10 0Cr18Ni9	S30400 304	SUS304	X5CrNi18-10	X5CrNi18-10 1.4301
304L Square Tubing	022Cr19Ni10 00Cr19Ni10	S30403 304L	SUS304L	X2CrNi18-9	X2CrNi18-9 1.4307

Properties:

Chemical properties:

Grade	C	Si	Mn	P	S	Ni	Cr	N
304 stainless steel square tube	≤0.07	≤0.75	≤2.00	≤0.045	≤0.030	8.00~10.50	17.50~19.50	≤0.10
304L square tube	≤0.030	≤0.75	≤2.00	≤0.045	≤0.030	8.00~12.00	17.50~19.50	≤0.10

Mechancal properties:

Grade	Yield Strength RP0.2/MPa	Tensile Strength Rm/MPa	Elongation after break A/%	Hardness value
				HBW	HRB	HV
304 stainless steel square tube	≥205	≥515	≥40	≤201	≤92	≤210
304L stainless steel square tube	≥180	≥485	≥40	≤201	≤92	≤210

Physical properties:

Grade	304 ss square tubing	304L ss square tubing
Density/（kg/dm³）20℃	7.93	7.90
Melting Range/℃	1398~1454	-
Specific Heat[kJ/(kg•K)]0℃~100℃	0.50	0.50
Thermal Conductivity/[W/(m•K)]	100℃: 16.3	100℃: 16.3
	500℃: 21.5	500℃: 21.5
Coefficient of Thermal Expansion/(10-6/K)	0℃~100℃: 17.2	0℃~100℃: 16.8
	0℃~500℃: 18.4	0℃~500℃: 18.3
Electrical Resistivity/(Ω•mm2/m)20℃	0.73	-
Modulus of Elasticity(kN/mm2)20℃	193	-

Characteristic:

304 stainless steel square tube:

304 stainless steel square tube is austenitic stainless steel, containing 9%-11% nickel and 18%-19% chromium. The former is resistant to organic acids, and the latter is resistant to corrosion in oxidizing environments and has excellent corrosion resistance.

304 ss square tubing has good ductility in the annealed state and is easy to stretch and form.

The hardness and strength of 304 square tube can be improved by cold working.

304 stainless steel square tubing can be welded by fusion welding and resistance welding. However, if water corrosion resistance is considered, it is not recommended to use 304 steel for a long time in the range of 426°C to 860°C.

Note: Cannot be hardened by heat treatment.
 

304L stainless steel square tube:

304L stainless steel is a 300 series austenitic stainless steel with carbon content reduced to 0.030% on the basis of 304 stainless steel, so it exhibits a lower corrosion rate than 304. But in most corrosive environments, the corrosion resistance of 304L square tubing is the same as that of 304.

304L square tube has superior intergranular corrosion resistance and excellent welding performance. It does not require post weld annealing. Therefore, it is preferably used in environments where intergranular corrosion is prone to occur in welds and heat-affected zones of sensitive alloys. If you care about welding quality, it is recommended to choose 304L instead of 304.

304L stainless steel square tube has better heat resistance and is more resistant to carbide precipitation. It can be heated to a temperature range of 1148°C to 1260°C during forging.

The processing performance of 304L square is the same as that of 304 ss square tubing, and it can be stretched and formed. However, in order to eliminate the stress generated during processing, it should be annealed or stress relieved as soon as possible after processing.
 

Application:

304 304L stainless steel square tube is a hollow long strip of steel, because the cross section is square, so it is called square tube. A large number of pipes are used to transport fluids, such as oil, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strengths are the same, they are lighter in weight, so they are also widely used in the manufacture of mechanical parts and engineering structures.

Stainless Steel Surface:
 

Stainless steel has a variety of surfaces, please contact us for confirmation.

Surface Finish	Definition	Application
2B	Those finished, after cold rolling, by heat treatment, pickling or other equivalent treatment and lastly  by cold rolling to given appropriate luster.	Medical equipment, Food industry, Construction material, Kitchen utensils.
BA	Those processed with bright heat treatment after cold rolling.	Kitchen utensils, Electric equipment, Building construction.
NO.3	Those finished by polishing with No.100 to No.120 abrasives specified in JIS R6001.	Kitchen utensils, Building construction.
NO.4	Those finished by polishing with No.150 to No.180 abrasives specified in JIS R6001.	Kitchen utensils, Building construction, Medical equipment.
HL	Those finished polishing so as to give continuous polishing streaks by using abrasive of suitable grain size.	Building Construction.
NO.1	The surface finished by heat treatment and pickling or processes corresponding there to after hot rolling.	Chemical tank, pipe.

FAQ:

Q:Can you send samples?

A:Sample can be for free,freight cost collect. 

Q:What product information do I need to provide? 

A:Steel grade/thickness/width/quantity,these will decide the price.

Q:About product prices? 

A:Prices vary from period to period due to cyclical changes in the price of raw materials.

Q:What are the certifications for your products? 

A:We have ISO 9001,CE,SGS,BV and other certifications.

Q:How about the delivery time? 

A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.

Q:Does the product have quality inspection before loading? 

A:All the products are strictly tested before packaging,also can inspect by third party inspection.

Q:How to pack the products?

A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.