Stainless Seamless Square Tubes A554 Mt304 250X250X9 L: 6mtr Pickled Surface

• Customization: Available
• Type: Stainless Steel Pipes, Seamless Pipe
• Standard: ASTM, AISI, GB, DIN, GOST9941
• Model NO.: MT304 250x250x9x6000
• Certification: ISO, ISO9001
• Shape: Round
• Technique: Cold Rolled
• Surface Treatment: Ap/Ba/Polishing/Sand Blasting/Shot Blasting
• Application: Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry
• Material: 304 Stainless Steel
• Outer Diameter: 2 Inch
• Wall Thickness: Schedule 10
• Length: Rl or FL
• Test: Ht/Et/Ut
• Delivery Time: Stock 7 Days; Mto 30 Days
• Trade Terms: EXW, Fob, CFR, CIF etc.
• Markings: According to A999/A999m
• Transport Package: Packed in Bundles or Plywooden Box
• Specification: 250x250x9x6000
• Trademark: GH-STEEL
• Origin: China
• HS Code: 7304419000
• Production Capacity: 2000ton Per Month

Product Description

Product Description

Stainless Steel Square Tube is a kind of stainless steel profile with rectangular and square hollow section, which is used in construction, machinery manufacturing, ship building, hardware, steel structure engineering and other industries with the advantages of corrosion resistance, high temperature resistance, high strength, etc., so it is widely used in industrial and civil fields. SS square pipe is also named stainless steel hollow section or box section. It made from stainless steel 304 and 316L is easy to handle and process due to the box section and smooth surface. We offer a wide range of sizes and wall thicknesses to meet the requirements of different applications. Stainless steel rectangular tubes can be used in construction, railings, furniture and even mechanical engineering.

Product Parameters

Stainless Steel Square Tube is a kind of stainless steel profile with rectangular and square hollow section, which is used in construction, machinery manufacturing, ship building, hardware, steel structure engineering and other industries with the advantages of corrosion resistance, high temperature resistance, high strength, etc., so it is widely used in industrial and civil fields.
ASTM A554 Gr 304 Rectangular Pipe is an austenitic stainless steel grade designed with a superior content of chromium and nickel embedded in them. This content makes these pipes well suited for use in reducing or oxidative media. The 304L Stainless Steel Rectangular Tube is a low-carbon module that protects the tube against sensitization, allowing the tubes to be subsequently welded in place using standard procedures. A SS 316 Rectangular tubing has near identical content of nickel and chromium, but the addition of molybdenum gives them enhanced resistance to pitting, especially in marine ecosystems. Similar to the 304l grade, the 316L Stainless Steel Rectangular Tube is a low-carbon constituent of this module. These tubes are easy to machine and weld when compared to the original grade. These tubes can be processed in seamless or welded configurations. The SS Rectangular Welded Pipes are designed with welds or seams and are very durable and reliable. If you have any questions or queries about the product type, contact us for more information.

Product Name	Seamless Stainless Steel Square/ Rectangular Pipes /Tubes
Company Inform	1.Name:WENZHOU GUOHAO STEEL., LTD   2.Type: Manufacturer
Material	MT304 MT304L MT316 MT316L
Standard	ASTM A554
Specification Er - External radius	HxB - Height x Base	20x20 - 400x400
	Wt - Wall thickness	2mm-12mm
	L - Length	Single random length/ Double random length or as customer's actual request
Surface	Pickled / Brushed / Polished
Technique	Cold Drawn
Packing	Unless otherwise specified in the order, all tubing shall be protected for shipment by bundling, paper or burlap wrapping, or boxing at the discretion of the manufacturer.
Delivery Time	1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the  deposit of T/T
Trade Terms	EXW,FOB, CFR, CIF etc.
Loading Port	Ningbo/Wenzhou/Shanghai
Remittance method	TT/LC/CASH
Container	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM

 

CHEMICAL COMPOSITION OF ASTM A554  STAINLESS STEEL SQUARE / RECTAGULAR TUBE PIPE

Element	MT304	MT304L	MT316	MT316L
	S30400	S30403	S31600	S31603
C, max	0.08	0.035	0.08	0.035
Mn, max	2	2	2	2
P, max	0.045	0.045	0.045	0.045
S, max	0.03	0.03	0.03	0.03
Si, max	1	1	1	1
Ni	8.0-11.0	8.0-12.0	10.0-14.0	10.0-14.0
Cr	18.0-20.0	18.0-20.0	16.0-18.0	16.0-18.0
Mo	. . .	. . .	2.00-3.00	2.00-3.00

MECHANICAL PROPERTIES OF OF ASTM A554  STAINLESS STEEL SQUARE / RECTAGULAR TUBE PIPE

Grade	UNS Designation	Tensile Strength min,[MPa]	Yield Strength min,[MPa]	Elongation in 2 in min,%
MT304	S30400	517	207	35
MT304L	S30403	483	172	35
MT316	S31600	517	207	35
MT316L	S31603	483	172	35

 

ASTM A554  STANDARD TOLERANCE   

Largest Specified	Wall Thickness (WT)		OD ±
OD (in Inches/ mm)	inches	mm	inches	mm
Under ½ (12.7)	00.020 to 0.049	00.51 to 1.24	0.004	0.1
½ to 1 (12.7 to 25.4)	00.020 to 0.065	00.51 to 1.65	0.005	0.13
½ to 1 (12.7 to 25.4)	over 0.065 to 0.134	over 1.65 to 3.40	0.01	0.25
over 1 to 1½ (25.4 to 38.1) including	00.025 to 0.065	00.64 to 1.65	0.008	0.2
over 1 to 1½ (25.4 to 38.1) including	over 0.065 to 0.134	over 1.65 to 3.40	0.01	0.25
over 1½ to 2 (38.1 to 50.8) including	00.025 to 0.049	00.64 to 1.24	0.01	0.25
over 1½ to 2 (38.1 to 50.8) including	over 0.049 to 0.083	over 1.24 to 2.11	0.011	0.28
over 1½ to 2 (38.1 to 50.8) including	over 0.083 to 0.149	over 2.11 to 3.78	0.012	0.3
over 2 to 2½ (50.8 to 63.5) including	00.032 to 0.065	00.81 to 1.65	0.012	0.3
over 2 to 2½ (50.8 to 63.5) including	over 0.065 to 0.109	over 1.65 to 2.77	0.013	0.33
over 2 to 2½ (50.8 to 63.5) including	over 0.109 to 0.165	over 2.77 to 4.19	0.014	0.36
over 2½ to 3½ (63.5 to 88.9) including	00.032 to 0.165	00.81 to 4.19	0.014	0.36
over 2½ to 3½ (63.5 to 88.9) including	over 0.165	over 4.19	0.02	0.51
over 3½ to 5 (88.9 to 127.0) including	00.035 to 0.165	00.89 to 4.19	0.02	0.51
over 3½ to 5 (88.9 to 127.0) including	over 0.165	over 4.19	0.025	0.64
over 5 to 7½ (127.0 to 190.5) including	00.049 to 0.250	1.24 to 6.35	0.025	0.64
over 5 to 7½ (127.0 to 190.5) including	over 0.250	over 6.35	0.03	0.76
over 7½ to 16 (190.5 to 406.4) including	all	all	00.00125 in./ in. or mm/ mm of circumstances

WEIGHT CHART OF OF ASTM A554  STAINLESS STEEL SQUARE TUBE PIPE

Size mm	kg/m	Size mm	kg/m
20 x 20 x 2.0	1.12	20 x 20 x 2.5	1.35
25 x 25 x 1.5	1.06	25 x 25 x 2.0	1.43
25 X 25 X 2.5	1.74	25 X 25 X 3.0	2.04
30 X 30 X 2.0	1.68	30 X 30 X 2.5	2.14
30 X 30 X 3.0	2.51	40 x 40 x 1.5	1.81
40 x 40 x 2.0	2.31	40 x 40 x 2.5	2.92
40 x 40 x 3.0	3.45	40 x 40 x 4.0	4.46
40 x 40 x 5.0	5.4	50 x 50 x 1.5	2.28
50 x 50 x 2.0	2.93	50 x 50 x 2.5	3.71
50 x 50 x 3.0	4.39	50 x 50 x 4.0	5.72
50 x 50 x 5.0	6.97	60 x 60 x 3.0	5.34
60 x 60 x 4.0	6.97	60 x 60 x 5.0	8.54
60 x 60 x 6.0	9.45	70 x 70 x 3.0	6.28
70 x 70 x 3.6	7.46	70 x 70 x 5.0	10.11
70 x 70 x 6.3	12.5	70 x 70 x 8	15.3
75 x 75 x 3.0	7.07	80 x 80 x 3.0	7.22
80 x 80 x 3.6	8.59	80 x 80 x 5.0	11.7
80 x 80 x 6.0	13.9	90 x 90 x 3.0	8.01
90 x 90 x 3.6	9.72	90 x 90 x 5.0	13.3
90 x 90 x 6.0	15.76	90 x 90 x 8.0	20.4
100 x 100 x 3.0	8.96	100 x 100 x 4.0	12
100 x 100 x 5.0	14.8	100 x 100 x 5.0	14.8
100 x 100 x 6.0	16.19	100 x 100 x 8.0	22.9
100 x 100 x 10	27.9	120 x 120 x 5	18
120 x 120 x 6.0	21.3	120 X 120 X 6.3	22.3
120 x 120 x 8.0	27.9	120 x 120 x 10	34.2
120 X 120 X 12	35.8	120 X 120 X 12.5	41.6
140 X 140 X 5.0	21.1	140 X 140 X 6.3	26.3
140 X 140 X 8	32.9	140 X 140 X 10	40.4
140 X 140 X 12.5	49.5	150 X 150 X 5.0	22.7
150 X 150 X 6.3	28.3	150 X 150 X 8.0	35.4
150 X 150 X 10	43.6	150 X 150 X 12.5	53.4
150 X 150 X 16	66.4	150 X 150 X 16	66.4
180 X 180 X 5	27.4	180 X 180 X 6.3	34.2
180 X 180 X 8	43	180 X 180 X 10	53
180 X 180 X 12.5	65.2	180 X 180 X 16	81.4
200 X 200 X 5	30.5	200 X 200 X 6	35.8
200 x 200 x 6.3	38.2	200 x 200 x 8	48
200 x 200 x 10	59.3	200 x 200 x 12.5	73
200 x 200 x 16	91.5	250 x 250 x 6.3	48.1
250 x 250 x 8	60.5	250 x 250 x 10	75
250 x 250 x 12.5	92.6	250 x 250 x 16	117
300 x 300 x 6.3	57.9	300 x 300 x 8	73.1
300 x 300 x 10	57.9	300 x 300 x 8	90.7
300 x 300 x 12.5	112	300 x 300 x 16	142
350 x 350 x 8	85.7	350 x 350 x 10	106
350 x 350 x 12.5	132	350 x 350 x 16	167
400 x 400 x 10	122	400 x 400 x 12	141
400 x 400 x 12.5mm	152	400 x 400 x 16	192

WEIGHT CHART OF OF ASTM A554  STAINLESS STEEL RECTAGULAR TUBE PIPE

Size mm	kg/m	Size mm	kg/m
40 x 20 x 2.0	1.68	40 x 20 x 2.5	2.03
40 x 20 x 3.0	2.36	40 x 25 x 1.5	1.44
40 x 25 x 2.0	1.89	40 x 25 x 2.5	2.23
50 x 25 x 2.0	2.21	50 x 25 x 2.5	2.72
50 x 25 x 3.0	3.22	50 x 30 x 2.5	2.92
50 x 30 x 3.0	3.45	50 x 30 x 4.0	4.46
50 x 40 x 3.0	3.77	60 x 40 x 2.0	2.93
60 x 40 x 2.5	3.71	60 x 40 x 3.0	4.39
60 x 40 x 4.0	5.72	70 x 50 x 2	3.56
70 x 50 x 2.5	4.39	70 x 50 x 3.0	5.19
70 x 50 x 4.0	6.71	80 x 40 x 2.5	4.26
80 x 40 x 3.0	5.34	80 x 40 x 4.0	6.97
80 x 40 x 5.0	8.54	80 x 50 x 3.0	5.66
80 x 50 x 4.0	7.34	90 x 50 x 3.0	6.28
90 x 50 x 3.6	7.46	90 x 50 x 5.0	10.11
100 x 50 x 2.5	5.63	100 x 50 x 3.0	6.75
100 x 50 x 4.0	8.86	100 x 50 x 5.0	10.9
100 x 60 x 3.0	7.22	100 x 60 x 3.6	8.59
100 x 60 x 5.0	11.7	120 x 80 x 2.5	7.65
120 x 80 x 3.0	9.03	120 x 80 x 4.0	12
120 x 80 x 5.0	14.8	120 x 80 x 6.0	17.6
120 x 80 x 8.0	22.9	150 x 100 x 5.0	18.7
150 x 100 x 6.0	22.3	150 x 100 x 8.0	29.1
150 x 100 x 10.0	35.7	160 x 80 x 5.0	18
160 x 80 x 6.0	21.3	160 x 80 x 8.0	27.9
200 x 100 x 5.0	22.7	200 x 100 x 6.0	27
200 x 100 x 8.0	35.4	200 x 100 x 10.0	43.6
250 x 150 x 5.0	30.5	250 x 150 x 6.0	38.2
250 x 150 x 8.0	48	250 x 150 x 10	59.3
300 x 200 x 6.0	48.1	300 x 200 x 8.0	60.5
300 x 200 x 10.0	75	400 x 200 x 8.0	73.1
400 x 200 x 10.0	90.7	400 x 200 x 16	142

 

Company Profile

Wenzhou Guohao Steel was established in 2008. We are ISO 9001:2015 approved manufacturer, having a state-of-the-art infrastructure facility for having smooth production process. It has successfully grown by focusing on serving customers across a range of high technology industries.Guohao Steel now has the whole of manufactured stainless steel products to add to its already large range of High Performance Nickel Alloys.
Guohao Steel adhere to the high standards of integrity and compliance required, including:
Environmental standards/ Health and safety standards/Ethical trading standards /Export compliance requirements
We now stock and have direct access to a wide range of other materials, including stainless steels and nickel alloys. We supply and process pipes for numerous key industry sectors, collaborating with both small businesses and large international manufacturers across various countries. Due to our reputation for quality, reliability, and industry approvals, we are a well-regarded supplier in diverse sectors. 

 

Packaging & Shipping

1. All of our stainless steel seamless pipe & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes together in batches.
2. For some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation.
3. For enhanced customer experience, we also provide dedicated package as per your special requirements.

 

Certifications

The inspection of our company and products is open to customers themselves or their designated third-party inspectors, such as SGS, BV, TUV, DNV, etc., who are well-known in the industry.

PRODUCT APPLICATION

• Food processing equipment, particularly in beer brewing, milk processing & wine making.
• Kitchen benches, sinks, troughs, equipment and appliances
• Architectural panelling, railings & trim
• Chemical containers, including for transport
• Heat Exchangers
• Oil and gas 

 

Our Advantages

FAQ

1.Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.

2.Q: Are you a manufacturer or trader?
A: We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.

3.Q: Can we get the some samples?Is there a charge?
A: Yes, we will provide you with the samples you want. The samples are free of charge, but the customer may have to pay the freight.

4.Q: Can we visit your factory?
A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.

5.Q: How do you ensure the quality of the product?
A: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.

6.Q: What is your delivery time?
A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 3-10 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days.

7.Q: Can you arrange shipment?
A: Of course, we have freight forwarders who have been cooperating for many years. We are VIP and can provide you with the most favorable prices and professional services.

8.Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.