Why Buyers Close Their ASTM B704 Tube Orders With Us
Ready Stock
Common sizes dispatched fast.
Cut to Length
Lengths up to 12 m on order.
3.1 / 3.2 MTC
Heat-wise test papers supplied.
Third-Party Check
Your inspector is welcome.
Export Packed
Crated and marked for sea freight.
ASTM B704 Tube at a Glance
- 1Scope: Boiler, heat exchanger and condenser tube
- 2Size: OD 1/8″ to 5″ · wall 0.015″ to 0.500″
- 3Standards: ASTM B704, ASME SB-704, ASTM B751
- 4Alloys: UNS N06625 · N06219 · N08825
- 5Make: Automatic weld, no filler, cold-worked, annealed
- 6Papers: EN 10204 3.1 / 3.2 certificate
Mumbai office: +91 22 6743 7134 • Test
certificate with every dispatch
ASTM B704 tube serves boilers, condensers and heat exchangers in corrosive duty. ASME SB 704 tube comes in three alloys: N06625, N06219 and N08825. ASME SB704 UNS N08825 heat exchanger tube handles sulphuric acid well. ASTM B704 UNS N06625 welded tubes are made from strip, without filler. ASME SB704 UNS N06219 tubing is the silicon grade in this standard. Share your grade, OD and wall thickness for a quick quote.
Mumbai · Welded Nickel Alloy Tube Exporters
ASTM B704 Welded Tubes Built to Stay Leak-Tight in Acid, Chloride and Heat
Buy cut lengths up to 12 m from a verified ASTM B704 Tube Supplier in India, with full test papers. Alloy 625, 825 and N06219 welded tube, inspected before dispatch.
- ✓ISO 9001:2015
- ✓EN 10204 3.1 MTC
- ✓ASME SB-704
- ✓Third-Party Inspection
- ✓Ready Stock
High Corrosion B704 Welded Nickel Alloy Tubes Manufacturer in India with EN 10204 3.1 / 3.2 MTC
ASTM B704 Tube Specification
ASTM B704 / ASME SB-704 Tube Scope
- Welded alloy tube for corrosion service
- Boiler, heat exchanger, condenser use
- Low or high temperature duty
ASME SB 704 Tube Size Window
- OD 1/8″ to 5″ (3.18-127 mm)
- Wall 0.015″ to 0.500″ (0.38-12.70 mm)
- Other sizes by agreement
ASTM B704 Alloy Tube Coverage
- UNS N06625 (Alloy 625)
- UNS N06219 (Ni-Cr-Mo-Si)
- UNS N08825 (Alloy 825)
ASTM B704 Welded Tube Heat Treatment
- Strip welded automatically, no filler
- Weld cold-worked before final anneal
- Oxide removed or bright annealed
ASTM B704 Tube Test Coverage
- Flattening and flange tests
- Class 1 or Class 2 NDT on each piece
- Tensile and chemistry per lot
ASTM B704 Tube Test Certificate
- EN 10204 3.1 MTC
- Certification and test report
- 3.2 and TPI on request
ASTM B704 UNS N06625 Tubes Size Chart
Outer Diameter
1/8″ – 5″
3.18 mm to 127 mm
Wall Thickness
0.015″ – 0.500″
0.38 mm to 12.70 mm
Length
Up to 12 m
Random or cut length
Dimension Rule
ASTM B751
Sizes and tolerances
Popular wall gauges (BWG):
BWG 180.049″ · 1.24 mm
BWG 160.065″ · 1.65 mm
BWG 140.083″ · 2.11 mm
BWG 120.109″ · 2.77 mm
BWG 100.134″ · 3.40 mm
BWG 80.165″ · 4.19 mm
ASME SB704 UNS N06219 Tubing and Other Grades Covered
UNS N06625
- Ni 58.0 min · Cr 20-23 · Mo 8-10
- Strong in chlorides and high heat
- Min tensile 827 MPa (120 ksi)
UNS N08825
- Ni 38-46 · Fe 22 min · Cu 1.5-3.0
- Handles sulphuric and phosphoric acid
- Min tensile 586 MPa (85 ksi)
UNS N06219
- Ni bal. · Cr 18-22 · Mo 7-9
- Silicon 0.70-1.10 % for scaling resistance
- Min tensile 660 MPa (96 ksi)
ASME SB704 UNS N06625 Boiler Tube Pressure Rating
B704 sets no fixed pressure class. Your design code sets the rating.
Pick Alloy
N06625, N06219 or N08825.
Take Stress S
ASME Section II-D, at design temperature.
Apply OD and Wall
Thicker wall raises rating.
Apply Weld Factor
Per your design code.
Prove by Test
Hydro, air, eddy or ultrasonic.
Design Codes
B31.3 / Sec. VIII
Typical for tube systems
Stress Source
ASME II-D
Falls as temperature rises
Class 1 Test
1 of 4 Tests
Hydro, air, eddy or UT
Class 2 Test
Leak + Electric
Both on every piece
Need a pressure check for your size?Send OD, wall, fluid and temperature. Our engineer replies.
ASTM B704 Welded Tubes Testing Methods
Chemical Analysis
One test per lot.
Tensile Test
Strength and elongation proved.
Flattening Test
Both ends of one tube per lot.
Flange Test
Both ends of one tube per lot.
Leak Test
Hydrostatic or air underwater.
Electric Test
Eddy current or ultrasonic.
On request:
✓Hardness
✓IGC
✓Pitting
✓Micro / Macro
✓Radiography
Types of ASTM B704 Tube We Supply
Every type is produced by an ASTM B704 Tube manufacturer in India, ready for inspection before dispatch.
ASME SB704 UNS N08825 Heat Exchanger Tube
UNS N08825
ASME SB 704 Welded Nickel Alloy Tubes
Nickel Alloy
ASTM B704 Tubing
Tubing
ASTM B704 UNS N06625 Welded Tubes
UNS N06625
ASTM B704 Welded Tubes
Welded
ASME SB704 Welded Alloy Tube
Alloy Tube
ASME SB704 UNS N06219 Tubing
UNS N06219
ASME SB704 UNS N06625 boiler Tube
Boiler Tube
Purchase ASME SB704 UNS N06625 Boiler Tube in lengths up to 12 m for Petrochemical & Pollution Control systems
ASME SB704 UNS N08825 Heat Exchanger Tube Application Industries
Petrochemical Units
Pollution Control Systems
Boiler & Superheater Banks
Shell & Tube Exchangers
Surface Condensers
Seawater Cooling Loops
Acid & Fertiliser Plants
Power Plant Heat Recovery
SB 704 N06625 Tube Weight Chart
| OD (in) | OD (mm) | Wall (BWG) | Wall (mm) | N06625 kg/m | N08825 kg/m | N06625 lb/ft |
|---|---|---|---|---|---|---|
| 1/4″ | 6.35 | BWG 18 | 1.24 | 0.168 | 0.162 | 0.113 |
| 3/8″ | 9.53 | BWG 18 | 1.24 | 0.273 | 0.263 | 0.183 |
| 1/2″ | 12.70 | BWG 16 | 1.65 | 0.483 | 0.466 | 0.325 |
| 5/8″ | 15.88 | BWG 16 | 1.65 | 0.623 | 0.600 | 0.418 |
| 3/4″ | 19.05 | BWG 14 | 2.11 | 0.948 | 0.914 | 0.637 |
| 1″ | 25.40 | BWG 14 | 2.11 | 1.303 | 1.257 | 0.876 |
| 1 1/4″ | 31.75 | BWG 12 | 2.77 | 2.128 | 2.053 | 1.430 |
| 1 1/2″ | 38.10 | BWG 12 | 2.77 | 2.595 | 2.503 | 1.744 |
| 2″ | 50.80 | BWG 10 | 3.40 | 4.273 | 4.121 | 2.871 |
| 2 1/2″ | 63.50 | BWG 10 | 3.40 | 5.418 | 5.225 | 3.641 |
| 3″ | 76.20 | BWG 8 | 4.19 | 8.000 | 7.716 | 5.376 |
| 4″ | 101.60 | BWG 8 | 4.19 | 10.822 | 10.437 | 7.272 |
| 5″ | 127.00 | BWG 8 | 4.19 | 13.644 | 13.159 | 9.168 |
Need a datasheet for your grade?Tell us the UNS number. We share the full data.
Weekly Delivery of ASTM B704 Tube in Below Countries
| Export to | Continent | Port | Shipping time |
|---|---|---|---|
| UAE | Asia | Port of Singapore | 11-50 Days |
| USA | North America | Port of Los Angeles | 30-45 Days |
| Italy | Europe | Port of Antwerp-Bruges | 20-54 Days |
ASTM B704 Tubing Surface Finish Options
Bright Annealed (BA)
Shiny, oxide-free, no descaling.
Annealed & Pickled (AP)
Oxide removed by acid pickle.
Oxide-Free Surface
Required by the B704 standard.
Polished OD
Mechanical polish on request.
Electropolished
Ultra-smooth, on request.
Smooth Bore ID
Clean flow, easy cleaning.
ASTM B704 UNS N06625 Welded Tubes Chemical Composition
| Composition | UNS N08825 | UNS N06625 |
|---|---|---|
| C | 0.05 max | 0.10 max |
| Mn | 1 max | 0.50 max |
| Ni | 38 – 46 | 58.0 min |
| Cr | 19.5 – 23.5 | 20 – 23 |
| Mo | 2.5 – 3.5 | 8 -10 |
| Fe | 22 min | 5.0 max |
| Ti | 0.6 – 1.2 | 0.40 max |
| Si | 0.5 max | 0.50 max |
| S | 0.03 max | 0.15 max |
| P | – | 0.15 max |
| Al | 0.2 max | 0.40 max |
ASME SB704 Welded Alloy Tube Mechanical Properties
| Grade | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation 4D(%) | ||
|---|---|---|---|---|---|
| Ksi | MPa | Ksi | MPa | ||
| UNS N08825 | – | 772 | – | 441 | 36 |
| – | 1000 | – | 889 | 15 | |
| UNS N06625 | 120 | 827 | 60 | 414 | 35 |
ASTM B704 Tube Equivalent Material Grades
Find ASTM B704 Tube Suppliers in Mumbai Providing quality materials.
USA (UNS)
- N06625 · N08825
- ASTM B704 · ASME SB-704
Germany / EN
- 2.4856 · NiCr22Mo9Nb (N06625)
- 2.4858 · NiCr21Mo (N08825)
Japan (JIS)
- NCF 625 (N06625)
- NCF 825 (N08825)
Trade Names
- Alloy 625 · Inconel® 625
- Alloy 825 · Incoloy® 825
Related Standards
- Seamless: ASTM B444 (625, 219) · B163 (825)
- Welded pipe: ASTM B705
- General rules: ASTM B751
ASME Twin
- ASME SB-704 mirrors ASTM B704
- Certification made mandatory in SB-704
Monthly Delivery of ASTM B704 Tube in Below Countries
| Export to | Continent | Port | Shipping time |
|---|---|---|---|
| Germany | Europe | Port of Rotterdam | 20-45 Days |
| Spain | Europe | Port of Hamburg | 33-34 Days |
| Malaysia | Asia | Port of Shanghai | 19-23 Days |
ASTM B704 Welded Tubes Manufacturing Process
Alloy Strip
Flat-rolled strip, tested heat.
Roll Form
Strip curled to a round.
Auto Weld
Seam fused, no filler metal.
Cold Work
Weld, or weld and base, worked.
Final Anneal
Heat treated for full ductility.
Clean & Test
Oxide removed, NDT done.
Benefits of ASTM B704 Welded Tubes
Pit Resistant
Mo and Nb fight chloride pits.
Acid Tolerant
Alloy 825 resists sulphuric acid.
Heat Strong
Annealed 625 serves to 593 °C.
Clean Seam
No filler metal in the weld.
Fully Traceable
Heat number on tube and MTC.
Get a firm per-kg rate todayNickel and molybdenum prices move daily. Send your list for a locked quote.
ASTM B704 Tube Test Certificates and Documents
EN 10204 3.1 MTC
Heat-wise chemistry and mechanicals
Always
EN 10204 3.2 Certificate
Co-signed by your inspector
On Request
Lot Test Report
Tensile, flattening and flange results
Always
NDT Report
Hydro, air, eddy or UT record
Always
PMI Report
Alloy verified before packing
Always
Third-Party Inspection Report
Independent lot release
On Request
What to Share for a Fast ASTM B704 Tube Quote ?
Required by SB-704
- 1Quantity: Feet or number of lengths
- 2UNS number: N06625, N06219 or N08825
- 3Size: OD and minimum or average wall
- 4Length: Random or specific
- 5Class: NDT Class 1 or Class 2
Add for a Faster Quote
- 1Designation: ASTM B704 or ASME SB-704
- 2Finish: BA, AP or polished
- 3Papers: 3.1, 3.2 or TPI
- 4Witness tests: Any you want inspected
- 5Port: Destination and incoterm
Ready to place a trial order?Share grade, size and port. We confirm stock and ship date.
ASTM B704 Tube Packing and Export Loading
Capped Ends
Plastic caps keep the bore clean.
Bundled Tight
Straight tubes strapped; coils on spools.
Crated for Sea
Wooden case or steel crate, ISPM-15.
Marked & Tagged
UNS, size and heat number on pack.
ASTM B704 Tube FAQs
What is the size range of ASTM B704 UNS N06625 welded tubes?
Outside diameter runs 1/8 to 5 inch; wall thickness runs 0.015 to 0.500 inch.
What is the ASME SB704 UNS N08825 heat exchanger tube price per kg?
Price follows alloy grade, nickel rates, size, wall and test class; share details for quote.
What is the HSN code for ASME SB 704 welded nickel alloy tubes?
HSN code is 7507 12 00 for nickel alloy tubes; GST is 18 percent.
Which material grades does an ASTM B704 tubing order cover?
UNS N06625 (Alloy 625), UNS N06219 and UNS N08825 (Alloy 825) are covered.
Does SB 704 N06625 tube ship with EN 10204 3.1 MTC?
Yes, each lot ships with a 3.1 test certificate showing chemistry and tensile data.
Material Inspection Facilities in the Following Countries
| Regions | Country |
|---|---|
| South Carolina | USA |
| North America | USA, Canada, Mexico |
| South America | Brazil, Argentina, Colombia |
| North Africa | Egypt, Morocco, Algeria |
| West Africa | Nigeria, Ghana, Senegal |
| East Africa | Kenya, Ethiopia, Tanzania |
| Middle East | Saudi Arabia, Iran, Iraq |
| South Asia | India, Pakistan, Bangladesh |
| East Asia | China, Japan, South Korea |
| Melanesia | Fiji, Papua New Guinea |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA