• Jiangsu Changjian Metal Products Co., Ltd.
    Eduardo
    The coil was packaged very well and shipped fast.The product fits the descripton. Thinking about purchasing again.Really a great product. I have tried other products and this by far is the best money I have spent.
  • Jiangsu Changjian Metal Products Co., Ltd.
    David
    First time we import a big project from China, excellent for service And really professionnal. My goods have been received, the products are not damaged at all.The quality and workmanship are very good, the materials are also very good, I am very satisfied. recommand them!
Contact Person : Elise
WhatsApp : +8617751672908

Hollow 304 Stainless Steel Rectangular Pipes Rigid Square Tube SS321 8k 2B

Place of Origin Jiangsu, China
Certification ISO9001, CE
Minimum Order Quantity 1 pcs
Delivery Time 7~10working days
Payment Terms L/C, T/T
Supply Ability 5000 Ton/Tons per Month
Product Details
Product Name Stainless Steel Round Pipe Technique Cold Rolled,Hot Rolled
Type Seamless Pipe(SMLS) Surface No.1,2D,2B,BA,No.4,8k,Tempered
Grade SS304,SS304L, SS316L, SS321
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Hollow Stainless Steel Rectangular Pipes

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SS321 Stainless Steel Square Pipes

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8k 2B Stainless Steel Square Pipes

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Product Description

 

304(1.4301)/304L(1.4307)/304H(1.4948) SEAMLESS&WELDED PIPE

 

Stainless Steel Grade 304 is the standard 18/8 (18% chrome, 8% nickel) austenitic stainless steel. It is a non-magnetic alloy in the annealed condition, however, becomes magnetic as it is cold worked. It is the most ordinarily utilized of all stainless grades. T304 can be effortlessly welded and is the preferred for many deep drawn, spun or formed parts due to its high ductility.

 

Stainless Steel Grade 304L has oxidation resistance to a maximum temperature of 1650°F (899°C) continuous without considerable scaling. The maximum temperature for intermittent presentation is 1500°F (816°C). Since 304L is an additional low-carbon variety of 304 it can frequently be utilized in the “as-welded” condition (without annealing), even in severe corrosive conditions, except for applications indicating stress relief. 304L has good welding qualities and can be welded by all standard strategy; however, consideration should be paid to maintain a strategic distance from weld “hot cracking”. To relieve stress during severe forming or spinning welding may be followed by annealing.

 

Stainless Steel Grade 304H includes a high carbon content making the steel more suitable for utilization in applications where high temperatures are available. The benefit of this grade is that it is an austenitic chromium-nickel steel alloy as well as the greater carbon content distribute to increased tensile and yield strength. The material is recommended for utilizing in ASME pressure vessels in working service above 525° C because of the grade's heat resistant properties.

STOCKING PROGRAM

  • Size Range : 1/4″ ~ 36″ NPS (Larger sizes available upon request)
  • Schedules : 10, 10s, 40, 40s, 80, 80s, 120, 160 (Custom wall thicknesses available upon request)
  • Stainless Steel Grades : 304, 304L, 316, 316L, 316L, 317L, 321 , 347
  • Special Alloys : 2205, 254SMo, Monel, Inconel
  • Chrome Moly : P5, P9, P11, P22, P91
  • Standards : ASTM / ASME

CHEMICAL COMPOSITION

Element C Mn Si P S Cr Ni N Fe
304 0.07% 2.0% 0.75% 0.045% 0.03% 17.5~19.5% 8.0~10.5% 0.10% Remainder
304L 0.03% 2.0% 0.75% 0.045% 0.03% 17.5~19.5% 8.0~12.0% 0.10% Remainder
304H 0.04~0.10% 2.0% 0.75% 0.045% 0.03% 18.0~20.0% 8.0~10.5% - Remainder

 

MECHANICAL PROPERTIES

Grade

 

Tensile Strength

(MPa)

Min

 

 

Yield Strength

0.2% Proof

(MPa)

Min

 

Elongation

(%in 50mm)

Min

Hardness

Rockwell B

(HR B)

Max

Brinell

(HB)

Max

304 515 205 40 92 201
304L 485 170 40 92 201
304H 515 205 40 92 201

 

ADVANTAGES:
 

Strength: Seamless pipes come with the obvious advantage of having no seam and therefore no chance of a weak seam. This means that typically, seamless pipe can withstand 20% more working pressure than welded ones of the same material grade and size.


Resistance: The lack of seam means that seamless pipe can offer higher resistance to corrosion because there is less opportunity for things like impurities and defects that can more commonly occur along a weld.


Less Testing: It goes without saying that seamless pipes don’t require testing for weld integrity – no weld means no test!