Stainless Steel Tubes
Trident Enterprises are among the pre-eminent organizations, involved in manufacturers, suppliers, stockists and exporter Stainless Steel Tubes. Available in different lengths, thicknesses and sizes, these Stainless Steel Tubes are widely demanded by various industries like food & beverage, chemical, petrochemical, pharmaceutical and cosmetics. In addition to this, we provide tailor-made solution for all our offered Stainless Steel Tubes as per customers’ requirements.
What is Stainless Steel?
In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is a steel alloy with a minimum of 10.5% chromium content by mass.Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, high-salinity, or poor air-circulation environments.There are different grades and surface finishes of stainless steel to suit the environment the alloy must endure. Stainless steel is used where both the properties of steel and corrosion resistance are required.
Stainless steel differs from carbon steel by the amount of chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by forming more iron oxide; and, because of the greater volume of the iron oxide, this tends to flake and fall away. Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion by blocking oxygen diffusion to the steel surface and blocks corrosion from spreading into the metal's internal structure.Due to the similar size of the steel and oxide ions, they bond very strongly and remain attached to the surface
Specification
| Type | Seamless Tube, ERW Tube, EFW Tube(Heat Exchanger Tubes) |
| Standard | ASTM A312, ASTM A358 , ASTM A813, ASTM A814, ANSI B36.19, AWS A5.9, SAE J1086, PA 15096-0001, A262 , A370, A941, A999/A999M, A1016/A1016M, E112, E381, E527, ASTM A-269, A-268, A-213, A-789, ASTM A-312, A-790, ASTM A-213, A 249, A-268, A-269, A-270, A271, A688, A-789, A 511, A554, A632, EN 10216-5 ASTM A-213, A 249, A-268, A-269, A-270, A271, A688, A-789, A 511, A554, A632, EN 10216-5, B677 Equivalent to ASME, EN, JIS Etc |
| Grade | TP304/304L, 304H, TP309/309S, TP316/316L, 316Ti, TP-316H, TP-316Ti , TP317/317L, TP321/321H, TP347/347H, TP405,TP410, TP416, TP904L, S31260, S31500, S31803, S32550, S32750, S32760, TP309Cb and TP348 etc. |
| Keywords | Austenitic Stainless Steel - Cold Working - Corrosive Service Applications - Forming - High-Temperature Service Applications - High-Temperature Services - Seamless Pipes And Tubes - Seamless Steel Tube - Stainless Steel Tube - Tubular Products - Welded Pipes And Tubes - Welded Steel Tube-Stainless Steel Heat Exchanger Tubes-Stainless Steel Instrumental Tubes-Electro Polish Stainless Steel Tubes |
| Size | 6.00 mm OD to 101.6 mm OD |
| Thickness | 0.89 mm THK to 6.00 mm THK |
| ICS Code | ICS Number Code 23.040.10 (Iron and steel tube) |
| UNSPSC Code | UNSPSC Code 40171621(Industrial welded stainless steel tube); 40171622(Industrial seamless stainless steel tube) |
| Quality Assurance | They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products. |
| Value Added Services |
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| Test Certificates | Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report |
Types of Stainless Steel Tubes:
- Stainless Steel Seamless Heat Exchanger Tubes
- Stainless Steel Instrumentation Tubes
- Stainless Steel Seamless Heat Exchanger ‘U’-Tubes
- Stainless Steel Tubes with Electro Polish.
- Stainless Steel tubes for Boiler application
Chemical Composition
| S.S. | 301 | 303 | 304 | 304L | 309 | 309s | 310s | 316 | 316L | 321 | 347 |
| Carbon | 0.15 | 0.15 | 0.08 | 0.03 | 0.20 | 0.08 | 0.08 | 0.08 | 0.03 | 0.08 | 0.08 |
| Manganese | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 |
| Silicone | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.5 | 1.00 | 1.00 | 1.00 | 1.00 |
| Chromium | 16/18 | 17/19 | 18/20 | 18/02 | 22/24 | 22/24 | 24/26 | 23/26 | 16/18 | 17/19 | 17/19 |
| Nickel | 6.0/8.0 | 8.0/10 | 8.0/12 | 8.0/12 | 12/15 | 12/15 | 19/22 | 10/14 | 10/14 | 9.0/12 | 9/13 |
| Molybdenum | 2.0/3.0 | 2.0/3.0 | |||||||||
| Phosphorus | 0.045 | 0.20 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 |
| Nitrogen | |||||||||||
| Suiphur | 0.03 | 0.15MIN | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Selenium | |||||||||||
| Aluminium | |||||||||||
| Titanium | 5XC | ||||||||||
| Cb+Ta | 10XC | ||||||||||
| Tensile Strength |
110 | 90 | 85 | 60 | 90 | 90 | 95 | 85 | 78 | 87 | 92 |
| 2% Yield Strength |
40 | 35 | 35 | 30 | 40 | 40 | 40 | 35 | 30 | 35 | 35 |
| Elongation in 2' |
60 | 50 | 55 | 55 | 45 | 45 | 45 | 55 | 55 | 55 | 50 |
| Rockwell | 85 | 84 | 80 | 76 | 85 | 85 | 87 | 80 | 76 | 80 | 84 |
| Brinell | 165 | 160 | 150 | 140 | 165 | 165 | 170 | 150 | 145 | 150 | 160 |
| En58E | En58J&H | En58C | |||||||||
| X12 CrNi17.7 |
X5 CrNi18.9 |
X5 CrNi18.8 |
x5 CrNiMo18.12 |
X2 CrNiMo19.1 |
|||||||
| AUST. | AUST. | AUST. | AUST. | AUST. | AUST. | AUST. | AUST. | AUST. | AUST. | AUST. |
Chemical Composition AISI Wrought Stainless Steel
| Physical corrosion resistance & other properties of important S.S.Grades | ||||||||||||||||||
S.S.Grade |
301 | 303 | 304 | 304L | 309 | 309S | 310S | 316 | 316L | 321 | 347 | |||||||
Density |
8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | |||||||
Sp.Elec. Resist 20C micro |
72 | 72 | 72 | 72 | 78 | 78 | 78 | 74 | 74 | 72 | 73 | |||||||
Sp. Heat (0-100c) |
0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |||||||
Ther. Conductivity |
16.3 | 16.3 | 16.3 | 16.3 | 14.2 | 14.2 | 14.2 | 16.3 | 16.3 | 16.3 | 16.3 | |||||||
| 17.0 | 17.2 | 17.3 | 17.3 | 15.0 | 15.0 | 15.9 | 15.9 | 15.9 | 16.6 | 16.6 | ||||||||
Mild water |
X | X | X | X | X | X | X | X | X | X | X | |||||||
Industrial |
X | X | X | X | X | X | X | X | X | X | X | |||||||
Marine |
X | X | X | X | X | X | X | X | X | X | X | |||||||
Salt Water |
X | X | ||||||||||||||||
Mild |
X | X | X | X | X | X | X | X | X | X | X | |||||||
Oxidising |
X | X | X | X | X | X | X | X | X | X | X | |||||||
Reducing |
X | X | ||||||||||||||||
Abrasion Resistance |
Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | |||||||
Cold Forming |
Good | Excel | Excel | Good | Good | Good | Good | Good | Good | Good | Good | |||||||
Weldability |
Excel | Excel | Excel | Excel | Good | Excel | Excel | Excel | Excel | Excel | Excel | |||||||
Melting Flange |
1400 1450 | 1370 1400 | ||||||||||||||||
Scaling Temp |
800 | 900 | 900 | 900 | 1100 | 1100 | 1100 | 900 | 900 | 900 | 900 | |||||||
300 Series Austinetic Physical Properties
| Type | UNS | Tensile (ksi) min |
Yield (ksi) min |
Elongation min |
Hardness (Brinell) max |
Hardness (Rockwell B) max |
| 302 | S30200 | 75 | 30 | 40% in 2" | 183 | 88 |
| 304* | S30400 | 75 | 30 | 40% in 2" | 183 | 88 |
| 304L* | S30403 | 70 | 30 | 40% in 2" | 183 | 88 |
| 309 | S30900 | 75 | 30 | 40% in 2" | 217 | 95 |
| 309S | S30908 | 75 | 30 | 40% in 2" | 217 | 95 |
| 310 | S31000 | 75 | 30 | 40% in 2" | 217 | 95 |
| 310S | S31008 | 75 | 30 | 40% in 2" | 217 | 95 |
| 316* | S31600 | 75 | 30 | 40% in 2" | 217 | 95 |
| 316L* | S31603 | 70 | 25 | 35% in 2" | 217 | 95 |
| 317 | S31700 | 75 | 30 | 35% in 2" | 217 | 95 |
| 317L | S31703 | 75 | 30 | 35% in 2" | 217 | 95 |
| 321 | S32100 | 75 | 30 | 40% in 2" | 183 | 88 |
| 347 | S34700 | 75 | 30 | 40% in 2" | 183 | 88 |
400 Series Martensitic Physical Properties
| Type | UNS | Tensile (ksi) min |
Yield (ksi) min |
Elongation min |
Hardness (Brinell) max |
Hardness (Rockwell B) max |
| 410* | S41000 | 65 | 30 | 20% in 2" | 217 | 95 |
| 410S | S41008 | 60 | 30 | 22% in 2" | 183 | 88 |
| 416 | S41600 | 75 | 40 | 30-25% in 2" | - | 82 |
| 420 | S42000 | 95 | 60 | 30-25% in 2" | - | 92 |
| 430 | S43000 | 65 | 30 | 22% in 2" | 183 | 88 |
| 440C | S44004 | - | - | - | - | - |
Mechanical Properties
Type |
Temper |
Tensile Strength ksi |
Yield Strength ksi |
Minimum Elongation in 2" (%) |
Rockwell (1) Hardness |
| 304 304L |
Annealed Half Hard Full Hard |
100 max. 110-140 140 min. |
25-45 70-110 110 min. |
35 15 7 |
B 90 max. B 93-C 30 C 22 min. |
| 310 | Annealed Half Hard Full Hard |
100 max. 115-135 140 min. |
35-55 75-115 115 min. |
35 15 5 |
B 95 max. B 95-C 26 C 24 min. |
| 316 316L |
Annealed Half Hard Full Hard |
100 max. 110-140 140 min. |
30-50 70-110 110 min. |
35 15 6 |
B 95 max. B 95-C 26 C 24 min. |
| 321 | Annealed Half Hard Full Hard |
100 max. 110-140 140 min. |
35-55 80-120 120 min. |
35 15 6 |
B 92 max. B 95-C 26 C 24 min. |
| 347 | Annealed Half Hard Full Hard |
100 max. 110-140 140 min. |
35-55 80-120 120 min. |
35 15 6 |
B 92 max. B 95-C 26 C 24 min. |
| 403 410 |
Annealed Half Hard Full Hard |
85 max. 85-100 100 min. |
30-50 65-85 85 min. |
35 15 5 |
B 95 max. B 90-B 100 C 96 min. |
| 430 | Annealed Half Hard Full Hard |
85 max. 82-97 98 min. |
35-50 60-90 85 min. |
35 15 5 |
B 90 max. B 85-98 C 93 min. |
| 446 | Annealed Half Hard Full Hard |
95 max. 95-115 115 min. |
40-75 70-90 85 min. |
35 15 4 |
B 95 max. B 90-C 24 B 96 min. |
| A-286 | Annealed Half Hard Full Hard |
1010 max. 115-140 140 min. |
35-65 80-110 110 min. |
35 15 3 |
B 95 max. B 96-C 26 C 26 min. |
Stainless Steel Pipe Tolerances
| NPS Designator | Permissible Variations in Outside Diameter | |
|---|---|---|
| Over In. | Under In. | |
| 1/8 to 1-1/2, incl | 1/64 (0.015) | 1/32 (0.031) |
| Over 1-1/2 to 4, incl | 1/32 (0.031) | 1/32 (0.031) |
| Over 4 to 8, incl | 1/16 (0.062) | 1/32 (0.031) |
| Over 8 to 18, incl | 3/23 (0.093) | 1/32 (0.031) |