Why Does Ganpat Industrial Corporation Win Bulk Enquiries For Alloy Steel F91 Threaded Fittings?
Since 1997
Forging alloy and stainless piping material from Mumbai for almost 30 years
Manufacturer & Stockist
Forged fittings, bars and fasteners plus stocked pipes, plates and tubes
ISO 9001:2015
Quality management system certified and audited every year without fail
PED & Petrofac Approved
Cleared for European pressure equipment projects and Petrofac vendor lists
Full Documentation
Mill test certificate, hardness report and PMI record on every batch
Alloy Steel F91 Threaded Fittings Aspects
- 1Material Basis: Modified 9Cr-1Mo-V-Nb Martensitic Alloy Steel • UNS K90901 • 1.4903
- 2Governing Standard: ASTM A182 Grade F91 • ASME SA182 • Dimensions To ANSI B16.11
- 3Size Range: ⅛ Inch To 4 Inch NPT, Class 2000, 3000 & 6000
- 4High Chromium: 8.00% To 9.50% Cr With V & Nb For Creep Strength
- 5Equivalents: DIN/EN 1.4903 X10CrMoVNb9-1 • AFNOR TU Z10 CDVNb09-01
- 6Forms Supplied: Elbow, Tee, Cross, Coupling, Union, Cap & Bushing
Mumbai works desk • WhatsApp +91 85912 64209 • Same-day size-wise quote
Ganpat Industrial Corporation has forged and stocked alloy piping material since 1997. Alloy Steel F91 Threaded Fittings carry controlled vanadium and niobium additions. This raises creep strength well above plain 9Cr-1Mo grade F9 fittings. It suits ultra-supercritical boiler steam lines running near 650°C. We supply ASTM A182 F91 Elbows, Tees, Couplings, Unions and Bushings. Every fitting is machined to ANSI B16.11 in Class 2000, 3000 and 6000. We normalize, temper and test each batch at our Mumbai facility. This makes us a dependable Chrome Moly F91 Fittings source for India. Every despatch carries an EN 10204 3.1 mill test certificate. We regularly supply this range to Vadodara, Chennai and Kandla. We also export to Dubai, Jebel Ali, Rotterdam and Houston.
Mumbai · Modified 9Cr-1Mo-V-Nb Forged Threaded Fittings Stockist & Exporter
xplore Alloy Steel F91 Screwed Fittings Manufacturer in India
Ganpat Industrial is a driven-pricing Alloy Steel F91 Threaded Fittings Supplier in India. We stock ASTM A182 F91 Elbows, Tees and Couplings from ⅛ inch to 4 inch.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
UNS Designation
K90901
Werkstoff 1.4903, X10CrMoVNb9-1
Chromium Content
8.00 – 9.50%
Plus 0.18-0.25% V, 0.06-0.10% Nb
Dimensional Standard
ANSI B16.11
Socket-Weld & Threaded Forged Fittings
Size Range
⅛ – 4 Inch
Class 2000, 3000 & 6000 threaded
Ultra-High Temperature Chrome Moly F91 Screwed Tee Manufacturer in India as per ASME Code
Specification Of Alloy Steel F91 Threaded Fittings
Every Alloy Steel F91 Threaded Fittings order is checked against this specification sheet.
Material Basis
- Modified 9Cr-1Mo-V-Nb Martensitic Steel
- UNS K90901
- Werkstoff 1.4903
- Normalized & Tempered
Governing Fitting Standards
- ASTM A182 Grade F91
- ASME SA182 Grade F91
- ANSI/ASME B16.11
- MSS SP-79 & SP-83 Reference
Fitting Size Range
- ⅛ Inch To 4 Inch NPT
- Class 2000 For Light Duty
- Class 3000 & 6000 High Pressure
- BSPT Threads On Request
Fitting Types Supplied
- Elbow, Tee & Cross
- Coupling, Union & Cap
- Bushing, Hex Plug & Nipple
- Forged & Machined Construction
Delivery Condition
- Normalized & Tempered Condition
- Normalizing Temp 1040-1080°C
- NPT Threads Cut Per ASME B1.20.1
- Black, Bright Or Machined Finish
Production Route
- Hot Forged Solid Bar Billet
- Machined Body & Threaded Bore
- Normalizing & Tempering Heat Treatment
- Final Thread Gauging & Inspection
Testing Offered
- Chemical & PMI Analysis
- Hardness & Impact Testing
- Hydrostatic Pressure Test
- Third Party Inspection
Matching Products
- ASTM A335 P91 Pipe
- ASTM A182 F91 Flanges
- A182 F91 Socket Weld Fittings
- F91 Round Bar & Forgings
Packing
- Threads Capped Or Plugged
- Wooden Crates, Fumigated For Export
- Grade & Heat Number Tags
- VCI Wrap For Sea Freight
ANSI B16.11 Alloy Steel F91 Threaded Fittings Dimensions
Chrome Moly F91 High Pressure Threaded Fittings, Built To Class 6000
Centre-to-end length and outside diameter for Class 3000 threaded 90° elbows by NPS.
| NPS | OD At Thread (mm) | Centre-To-End (mm) |
|---|---|---|
| ⅛″ | 13.7 | 19.1 |
| ¼″ | 17.3 | 23.9 |
| ½″ | 27.0 | 28.4 |
| 1″ | 39.7 | 38.1 |
| 1½″ | 52.8 | 47.6 |
| 2″ | 63.8 | 57.2 |
| 3″ | 91.0 | 73.1 |
| 4″ | 115.4 | 85.7 |
Types Of Alloy Steel F91 Threaded Fittings We Supply
A trusted Alloy Steel F91 Threaded Fittings Manufacturer in India stocks every common shape.
Alloy Steel F91 Threaded Elbows
90° / 45°
Chrome Moly F91 Screwed Tee
Equal Run
Alloy Steel F91 Threaded Cross
4-Way
Alloy Steel F91 Threaded Couplings
Full / Half
Alloy Steel F91 Screwed Union
3-Piece
Alloy Steel F91 Threaded Cap
Pipe Cap
Chrome Moly F91 Threaded Bushing
Reducer
Alloy Steel F91 Threaded Hex Plug
Solid Plug
Alloy Steel F91 Threaded Pipe Nipple
Barrel / Swage
Chrome Moly F91 Threaded Bushing Wall Thickness Chart
Minimum wall thickness by pressure class, used to set fitting socket bore and rating.
| NPS | Class 2000 | Class 3000 | Class 6000 |
|---|---|---|---|
| ⅛″ | 1.65 | 2.24 | 3.02 |
| ½″ | 2.11 | 2.87 | 3.73 |
| 1″ | 2.77 | 3.38 | 4.55 |
| 2″ | 3.91 | 5.54 | 7.14 |
Need ASME SA182 Alloy Steel F91 Threaded Fittings In A Hurry?Mail the size list, we quote inside 24 hours for large batch orders too.
Buy Normalized & Tempered Condition Alloy Steel F91 Threaded Elbows with Impact Testing & Hardness Testing for USC Boilers
ASTM A182 Alloy Steel F91 Threaded Fittings Chemical Composition
Composition held against ASTM A182 Grade F91 heat and product analysis limits.
IronFe
Balance
ChromiumCr
8.00 – 9.50%
MolybdenumMo
0.85 – 1.05%
VanadiumV
0.18 – 0.25%
NiobiumNb
0.06 – 0.10%
ManganeseMn
0.30 – 0.60%
SiliconSi
0.20 – 0.50%
NitrogenN
0.03 – 0.07%
NickelNi
0.40% max
PhosphorusP
0.020% max
SulphurS
0.010% max
CarbonC
0.08 – 0.12%
AluminiumAl
0.020% max
ASME SA182 Alloy Steel F91 Threaded Fittings Mechanical Properties
Minimum Values, Normalized & Tempered Condition
These figures are what an inspector checks against the mill test certificate.
Tensile Strength
620 MPa Min
90 ksi min, per ASTM A182
Yield Strength (0.2%)
415 MPa Min
60 ksi min
Elongation
20% Min
In 2 in. [50 mm] gauge length
Hardness
190-248 HBW
Brinell, per ASTM A182 Table 2
Physical Properties Of Chrome Moly F91 Screwed Fittings
An Alloy Steel F91 Threaded Fittings Supplier in India confirms typical physical values for drawings.
Density
~7.70 g/cm³
0.278 lb/in³ approx
Melting Range
~1400 – 1460°C
2550 – 2660°F approx
Modulus Of Elasticity
190 – 210 GPa
At room temperature
Thermal Conductivity
~25 W/m·K
At 100°C approx
Coeff. Thermal Expansion
~11 µm/m·K
20-100°C approx
Specific Heat
~460 J/kg·K
At room temperature approx
Poisson’s Ratio
0.27 – 0.30
At room temperature
Max Service Temp
650°C
Continuous, ultra-supercritical steam duty
Alloy Steel 1.4903 Threaded Fittings Equivalent Grades
One Chemistry, Several Nameplates
Alloy Steel F91 Threaded Fittings read the same modified 9Cr chemistry across each standard.
ASTM / UNS
- ASTM A182 Grade F91
- ASME SA182 Grade F91
- UNS K90901
DIN / EN / Werkstoff
- Werkstoff Nr. 1.4903
- EN / DIN X10CrMoVNb9-1
- Same UNS K90901 Basis
AFNOR / Related Forms
- AFNOR TU Z10 CDVNb09-01
- Matching Pipe ASTM A335 P91
- Matching Tube ASTM A213 T91
Casting & Forging Kin
- Cast Equivalent ASTM A217 C12A
- Large Forging ASTM A336 F91
- Same Base 9Cr-1Mo-V-Nb Chemistry
Nearby ASTM Grades
- ASTM A182 F9 (Standard 9Cr-1Mo)
- ASTM A182 F92 (Higher Tungsten Grade)
- ASTM A182 F11 (2.25Cr-1Mo)
Indian Market Note
- No Single-Number IS Equivalent
- Ordered Directly As F91 / K90901
- Compared By Chemistry Basis
Alloy Steel F91 Threaded Fittings Delivered Weekly to the Following Countries.
| Export to | Countries | Continent | Shipping time | Ports |
|---|---|---|---|---|
| Netherlands | Europe | 30 | Manila | |
| Kuwait | Asia | 10 | Shuaiba | |
| Nigeria | Africa | 30 | Calabar |
Alloy Steel K21590 Threaded Forged Fittings Heat Treatment
From Billet To Certified Threaded Fitting
How UNS K90901 stock becomes a finished, traceable forged threaded fitting at our works.
Forging
Solid billet hot-forged to near-net fitting shape
Normalizing
Heated to 1040-1080°C, then air cooled uniformly
Tempering
Reheated to 730-800°C for tempered martensite structure
Machining & Threading
Body machined, NPT threads cut per ASME B1.20.1
Dispatch
Tagged and shipped with EN 10204 3.1 certificate
Chrome Moly F91 vs Standard F9 Threaded Fittings
Buyers often compare F91 with plain F9. We get asked this on almost every enquiry.
ASTM A182 F9 Threaded Fittings
- Plain 9Cr-1Mo, no V or Nb
- Lower allowable stress at 600°C
- Thicker walls needed for same pressure
- Lower material cost than F91
Alloy Steel F91 Threaded Fittings
- Vanadium and niobium micro-alloyed for creep
- Around 30% higher allowable stress at 600°C
- Thinner, lighter fittings for same rating
- Preferred for USC and supercritical boilers
Chrome Moly F91 Threaded Fittings Applications
High creep strength fittings suit welded and threaded small-bore lines across a wide spread.
USC & Supercritical Boiler Lines
Main Steam & Hot Reheat Piping
HRSG & Combined Cycle Plant
Petrochemical Hot Service Lines
Refinery Hydrocracker Units
Instrument & Drain Connections
High Temperature Valve Bodies
Power Plant Header Assemblies
Alloy Steel F91 Threaded Elbow Weight Chart
Class 3000 90° threaded elbow weight calculated from bore, wall and body geometry.
| NPS | Class | Approx Weight (kg) |
|---|---|---|
| ⅛″ | 3000 | 0.05 |
| ¼″ | 3000 | 0.09 |
| ½″ | 3000 | 0.22 |
| 1″ | 3000 | 0.55 |
| 2″ | 3000 | 1.85 |
| 4″ | 3000 | 7.40 |
Monthly Delivery of Alloy Steel F91 Threaded Fittings to Below Countries
| Export to | Countries | Continent | Shipping time | Ports |
|---|---|---|---|---|
| Colombia | South America | 45 | Buenaventura | |
| Morocco | Africa | 45 | Tanger Med |
Alloy Steel F91 Threaded Fittings Price In India
Driven Pricing, Not A Flat Rate Card
Chromium and molybdenum prices move week to week, so our F91 pricing follows LME reference.
Send a size-wise quantity list for per-piece pricing. Get it inside 24 hours. HSN and GST are already worked out.
Stock, MOQ & Dispatch Timeline
From Enquiry To Gate Pass
The real clock on an Alloy Steel F91 Threaded Fittings order, not a marketing promise.
Day 0 – Enquiry
Mail size, class and quantity to our Mumbai desk
Day 1 – Driven Quote
Per-piece rate against the day’s alloy reference, GST included
Day 2 – Inspection
Chemistry, hardness and thread gauging cleared, TPI called if needed
Day 3 – Dispatch
Stock sizes leave with LR copy and full document set
Stock Range
⅛ – 2 Inch
Common classes held in Mumbai
Minimum Order
25 Kg
Per size, trial lots considered
Large Qty Lead Time
20 – 25 Days
Above 3 inch, indented against order
Export Transit
Nhava Sheva
Air or sea, FOB CFR CIF DDP quoted
Alloy Steel F91 Threaded Tee Documentation & Test Certificates
Every order ships with paperwork that matches the physical fitting, size for size.
Mill Test Certificate
Chemical and mechanical results per EN 10204 3.1
Standard
Charpy Impact Test Report
Supplementary test, temperature and value per order
On Request
Third Party Inspection Report
SGS, BV, TUV or Lloyd’s, arranged on request
On Request
Certificate Of Origin
Chamber-attested, needed for most export shipments
Export
Packing List & Invoice
Heat-number traceable listing for every carton or crate
Standard
Alloy Steel F91 Threaded Hex Plug Testing
A serious Alloy Steel F91 Threaded Fittings Supplier in India tests every batch before dispatch.
Chemical / PMI Analysis
Spectro reading against UNS K90901 composition limits
Hardness Test
Brinell readings held between 190 and 248 HBW
Charpy Impact Test
Toughness checked as supplementary test on request
Tensile & Yield Test
Tensile, yield and elongation tested per ASTM A182
Dimensional & Thread Gauging
NPT thread ring and plug gauges checked every batch
Hydrostatic Test
Pressure held per fitting class, leak checked visually
Alloy Steel F91 Threaded Fittings Frequently Asked Questions
What is the difference between F9 and F91 fittings?
F91 adds vanadium and niobium for much higher creep strength.
What is the UNS number for Alloy Steel F91 Threaded Fittings?
UNS K90901, also shown as Werkstoff Nr. 1.4903.
What sizes are available in ANSI B16.11 threaded fittings?
⅛ inch to 4 inch, Class 2000, 3000 and 6000.
What is the HSN code for Alloy Steel F91 Threaded Fittings?
HSN 7307, taxed at 18% GST in India.
Is F91 suitable for cryogenic or sub-zero service?
No. F91 is built for high heat, not low temperature duty.
Material Inspection Facility in Following Locations
| Morocco | Kenya | Gabon | Houston | Dubai | Tunisia |
| Abu Dhabi | South Africa | Nigeria | Mozambique | USA | Oman |
| Saudi Arabia | Riyadh | Dammam | Al-Khobar | UAE | Al Jubail |
| Angola | Ethiopia | Egypt | Zambia | Ghana | Tanzania |
| New South Wales | Indiana | Texas | California | Algeria | Carolina |
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