Customization: | Available |
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Type: | Stainless Steel Pipes, Stainless Steel Pipes |
Standard: | ASTM, AISI, GB, DIN, GOST9941, ASTM, AISI, GB, JIS, DIN, En, GOST |
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Shot blasting or peening Stainless Steel?
You would think that stainless steel is exactly that - stainless. What makes stainless steel stainless? In a word, chrome. Stainless steel is an alloy of iron with a minimum of 10.5 percent chromium. Chromium produces a thin layer of oxide on the surface of the steel-the "passive" layer-that prevents surface corrosion. When shot blasting/peening with a steel media, the carbon steel media used embeds contaminants into the stainless steel. Unprotected carbon steel rusts when exposed to air and moisture. This iron oxide film (rust) is "active" and accelerates corrosion by making it easier for more iron oxide to form.
One way to eliminate this issue, is to blast/peen the stainless parts with stainless steel media. By doing this, no contaminants are embedded into the stainless part, and thus, no rusting. However, only stainless steel parts can be blasted in stainless steel media. Should you blast a carbon steel part in stainless steel media, you will contaminate your media, which will in turn contaminate future stainless parts. Stainless steel media is very expensive in comparison to carbon steel media, so most mass finishers do not have machines loaded with stainless steel media, and if they do, the price reflects this as they are limited in the jobs they can run in that machine.
Another method to solve this issue is passivation. In stainless steel, passivation means removing the free iron from the surface of the metal using an acid solution to prevent rust. When the surface iron is removed, the other components of the alloy (primarily chromium, often nickel as well) are left behind as a surface layer over the underlying steel. Upon exposure to air, these elements react with oxygen to form an oxide layer that protects the rest of the steel from corrosion. solutions, bleach or salt (oceanic environments) all will contribute to the need for passivation of the stainless steel.
Product Name | Seamless Stainless Steel Pipes /Tubes | |
Company Inform | 1.Name:WENZHOU GUOHAO STEEL., LTD 2.Type: Manufacturer |
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Material | Duplex : UNS S31803,UNS S32205, UNS S32750, UNS S32760 Austenitic :TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti, TP317L, TP321, TP321H, TP347H , 904L, 254SMO GOST Grade: 08х18н10т,12х18н10т(AISI 321), 10х17н13м2т(AISI 316Ti), , 20х23н18(AISI 310S), 06хн28мдт(AISI 904L), 08х18н10(AISI304) |
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Standard | ASTM A312,ASTM A213,ASTM A269,ASTM A511,ASTM A789,ASTM A790 EN 10216-5,DIN 17456 GB/T 14976,GB13296,GB/T21833 GOST 9940,GOST 9941 |
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Specification | D(Outer Diameter) | 6mm-660mm ; 1/8inch-24inch |
T(Wall Thickness) | 1mm-40mm ; SCH5S, SCH10S, SCH40S, SCH80S, SCH160, SCHXXS | |
L(Length) | Single random length/ Double random length or as customer's actual request | |
Surface | Annealing&Pickling, Polishing180#-600#), Bright Annealing, Sand Blasting,Shot Blasting | |
Markings | Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydrotesting is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer's private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification. | |
Flattening Test | For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5% of the lot, but in no case less than 2 lengths of pipe. | |
Hydrostatic or Nondestructive Testing | Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test | |
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 |
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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 |
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Referenced Documents | ASTM Referenced Standards A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A370 Test Methods and Definitions for Mechanical Testing of Steel Products A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A999/A999M Specification for General Requirements for Alloy and Stainless-Steel Pipes A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes E112 Test Methods for Determining Average Grain Size E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) |
Chemical Composition (%) | Mechanical Performance | ||||||||||||||
Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N | Ti | Others | Mpa (kgf/mm²) | Elongation .(%) em 2" (min.) | Hardness | |
(AISI) | (max.) | (max.) | (max) | (max.) | (max.) | (min.) | (min.) | (min.) | (min.) | (min.) | HRB | ||||
(max.) | (max.) | (max.) | (max.) | (max.) | Tensile strength (min.) | Yield strength (min.) | (max.) | ||||||||
304 | 0,080 | 2,0 | 0,045 | 0,030 | 1,00 | 18,0 | 8,0 | 515 | 205 | 35 | 90 | ||||
20,0 | 11,0 | ||||||||||||||
304L | 0,035 | 2,00 | 0,045 | 0,030 | 1,00 | 18,0 | 8,0 | 485 | 170 | 35 | 90 | ||||
20,0 | 13,0 | ||||||||||||||
304H | 0,040 | 2,00 | 0,045 | 0,030 | 1,00 | 18,0 | 8,0 | 515 | 205 | 35 | 90 | ||||
0,100 | 20,0 | 11,0 | |||||||||||||
309S | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 22,0 | 12,0 | 0,75 | 515 | 205 | 35 | 90 | |||
24,0 | 15,0 | ||||||||||||||
310 | 0,150 | 2,00 | 0,045 | 0,030 | 1,00 | 24,0 | 19,0 | 515 | 205 | 35 | 90 | ||||
26,0 | 22,0 | ||||||||||||||
310S | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 24,0 | 19,0 | 0,75 | 515 | 205 | 35 | 90 | |||
26,0 | 22,0 | ||||||||||||||
310H | 0,04-0.10 | 2,00 | 0,045 | 0,030 | 1,00 | 24,0 | 19,0 | 515 | 205 | 35 | 90 | ||||
26,0 | 22,0 | ||||||||||||||
314 | 0,200 | 2,00 | 0,045 | 0,015 | 1,50 | 24,0 | 19,0 | 0,11 | 515 | 205 | 35 | 90 | |||
2,50 | 26,0 | 22,0 | |||||||||||||
316 | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 16,0 | 11,0 | 2,00 | 515 | 205 | 35 | 90 | |||
18,0 | 14,0 | 3,00 | |||||||||||||
316L | 0,035 | 2,00 | 0,045 | 0,030 | 1,00 | 16,0 | 10,0 | 2,00 | 485 | 170 | 35 | 90 | |||
18,0 | 14,0 | 3,00 | |||||||||||||
316Ti | 0,080 | 2,00 | 0,045 | 0,030 | 0,75 | 16,0 | 10,0 | 2,00 | 0,10 max | 5x(C+N)-0,70 | 515 | 205 | 35 | 90 | |
18,0 | 14,0 | 3,00 | |||||||||||||
317L | 0,035 | 2,00 | 0,045 | 0,030 | 1,00 | 18,0 | 11,0 | 3,00 | 515 | 205 | 35 | 90 | |||
20,0 | 15,0 | 4,00 | |||||||||||||
321 | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | 0,10 max | 5x(C+N)-0,70 | 515 | 205 | 35 | 90 | ||
19,0 | 12,0 | ||||||||||||||
321H | 0,040 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | 0,10 max | 4x(C+N)-0,70 | 515 | 205 | 30 | 90 | ||
0,100 | 19,0 | 12,0 | |||||||||||||
347 | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | Nb:10xC-1,00 | 515 | 250 | 35 | 90 | |||
19,0 | 13,0 | ||||||||||||||
904L | 0,020 | 2,00 | 0,040 | 0,030 | 1,00 | 19,00 | 23,00 | 4,00 | 0,10 max | Cu:1,00-2,00 | 490 | 215 | 90 | ||
UNS 8904 | 23,00 | 28,00 | 5,00 | ||||||||||||
UNS31803 | 0,030 | 2,00 | 0,030 | 0,020 | 1,00 | 21,00 | 4,50 | 2,50 | 0,080 | 620 | 450 | 25 | HRC 30 | ||
23,00 | 6,50 | 3,50 | 0,20 | ||||||||||||
UNS32205 | 0,030 | 2,00 | 0,030 | 0,020 | 1,00 | 22,00 | 4,50 | 3,00 | 0,14 | 655 | 485 | 25 | HRC 30 | ||
23,00 | 6,50 | 3,50 | 0,20 | ||||||||||||
SUPER DUPLEX UNS32750 | 0,030 | 1,20 | 0,035 | 0,020 | 0,80 | 24,00 | 6,00 | 3,00 | 0,24 | Cu: 0,50 max | 800 | 550 | 15 | HRC 34 | |
26,00 | 8,00 | 5,00 | 0,32 | ||||||||||||
SUPER DUPLEX UNS32760 | 0,030 | 1,00 | 0,030 | 0,010 | 1,000 | 24,00 | 6,00 | 3,00 | 0,20 | Cu:0,50-1,00 | 750 | 550 | 25 | HRC 32 | |
26,00 | 8,00 | 4,00 | 0,30 | W:0,50-1,00 |
Standard | Outside Diameter Tolerance(mm) | Thickness Tolerance(mm) | Length Tolerance (mm) | |||
ASTM A269 | D<12.7 | ±0.13 | ±15% | +3.2 / -0 | ||
(12.7~38.1] | ±0.13 | ±10% | ||||
[38.1~88.9) | ±0.25 | +4.8 / -0 | ||||
[88.9~139.7) | ±0.38 | |||||
[139.7~203.2) | ±0.76 | |||||
ASTM A213 | D<25.4 | ±0.1 | D≤38.1 | +20%/ -0% | D≤50.80 | +3 / -0 |
[25.4~38.1] | ±0.15 | |||||
(38.1~50.8) | ±0.2 | D>38.1 | +22%/ -0% | D>50.8 | +5 / -0 | |
[50.8~63.5) | ±0.25 | |||||
[63.5~76.2) | ±0.30 | |||||
[76.2~101.6] | ±0.38 | |||||
(101.6~190.5] | +0.38 / -0.64 | |||||
(190.5~228.6] | +0.38 / -1.14 | |||||
ASTM A312 | [10.29~48.26] | +0.4 / -0.8 | 10.3~73 | +20% / -12.5% | +6 / -0 | |
88.9~457 T/D≤5% | +22.5% / -12.5% | |||||
(48.26~114.30] | ±0.80 | 88.9~457 T/D>5% | +15% / -12.5% | |||
(114.30~219.08] | +1.6 / -0.8 | 508above T/D<5% | +22.5% /-12.5% | |||
(219.08~457.20] | +2.4 / -0.8 | 508above T/D>5% | +15%/-12.5% | |||
ASTM A789 | D<12.7 | ±0.13 | ±15% | +3 / -0 | ||
[12.7 to 38.1) | ±0.13 | ±10% | ||||
[38.1 to 88.9) | ±0.25 | +5 / -0 | ||||
[88.9 to 139.7) | ±0.38 | |||||
[139.7 to 203.2) | ±0.76 | |||||
ГОСТ 9941-81 | [5~10] | Normal:±0.30 High:±0.20 Higher:±0.15 |
T:0.2 | Normal:±0.05mm; High:±0.03mm |
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T:0.3~0.4 | Normal:±0.07mm; High:±0.05mm |
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T:0.5~1.0 | Normal:±0.15mm; High:±0.10mm |
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[11~30] | Normal:±0.40 High:±0.30 Higher:±0.20 |
T:1.2~3.0 | Normal:+12.5% / -15%; High:±12.5%; Higher:+12.5% / -10% |
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T:3.5~7.0 | Normal:±12.5%; High:+12.5% / -10%; Higher:±10% |
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[32~95] | Normal:±1.2% High:±1% Higher:±0.8% |
T:7.5~8.5 | Normal:+12.5% / -10%; Higher:±10% |
More than 16 Years of Experience in Stainless Steel Production.
Provides cost-effective products and professional services to you.
We offer an extensive range of stainless steel, super duplex steel,nickel alloy.
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.