Why Purchase Teams Choose Ganpat Industrial Corporation For Alloy Steel Fastener ?
Same-Day Quote
Send size, grade and length before 6 PM IST for next-morning pricing
Batch-Traceable Chromoly
Every A193 fastener heat number is traceable to its mill test certificate
M6 To M180 On Rack
Hex bolts, studs, nuts and U bolts held ready in Mumbai stock
Same-Week Dispatch
Rack sizes leave Mumbai within 5 working days of PO release
Torque Chart On Request
Diameter-wise torque values shared with every A193 U bolt quotation
Alloy Steel Fastener Functionalities
- 1Material Basis: Chromium-Molybdenum Alloy Steel • AISI 4140 / 4142 • Alloy Steel Stud, Bolt & Nut range
- 2Governing Standards: ASTM / ASME A193 • ASTM A320 L7 / L7M • ASTM A194 mating nuts
- 3Size Range: M6 to M180 metric • 1/4″ to 7″ inch • Custom U Bolt radius on drawing
- 4Grades: B5, B6, B6X, B7, B7M, B16, L7, L7M, S1, S2, S6 chromium-molybdenum grades
- 5Coating: PTFE, Teflon, Xylan, Hot-Dip Galvanized, Zinc, Black Oxide & Chrome Plated
- 6Product Range: Hex Bolt, Stud Bolt, U Bolt, Threaded Bar, Coupling & Lock Nut ex-stock
Mumbai works desk • WhatsApp +91 85912 64209 • Rack sizes dispatch the same week
Ganpat Industrial Corporation is an Alloy Steel Fastener Manufacturer in India. We have worked out of Mumbai since 1997. We forge, machine, and heat-treat chromium-molybdenum Alloy Steel Bolts. We also produce Alloy Steel Stud Bolts and Alloy Steel Nuts. These meet the ASTM / ASME A193 specification. We stock the matching A193 Alloy Steel U Bolt in metric threads. These metric threads range from M6 to M180. Grade B7, made from AISI 4140 / 4142 bar, remains the default pick. It is used for flange, valve, and pressure-vessel bolting. Grades B7M and L7 cover sour-service and low-temperature duty. Alloy Steel Square Bolts and an Alloy Steel T Bolt leave our works. Alloy Steel Eye bolts and Alloy Steel Threaded Bar accompany standard hex product. We also stock a matching Alloy Steel Coupling Nut. We supply Alloy Steel Dome nuts and Alloy Steel Shoulder Nuts. We hold an Alloy Steel Wing Nut and Alloy Steel Acorn Nuts. Alloy Steel Lock Nut sizes are available on the same purchase order. Every A193 Alloy Steel U Bolt ships with a diameter-wise torque reference. Your site team tightens to the correct clamp load first time.
Mumbai · Chromium-Molybdenum Alloy Steel Fastener Stockist & Exporter
Alloy Steel Fasteners That Hold Under Heat, Pressure & Torque
Ganpat Industrial is an Alloy Steel Fastener Supplier in India dispatching Grade B7, B7M and L7 hex bolts, studs, nuts and U bolts from Mumbai, each supplied with EN 10204 3.1 Documentation.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
High-strength A193 Alloy Steel U Bolt Manufacturer in India, Refer Torque Chart
Specification Of Alloy Steel Fastener
Order Sheet In One Glance
Everything a buyer normally emails us for, listed before you pick up the phone.
Alloy Steel Fastener Material Basis
- Chromium-Molybdenum Alloy Steel
- AISI 4140 / 4142 Bar & Forging Stock
- Alloy Steel Bolts & Alloy Steel Nuts
- Alloy Steel Stud & Alloy Steel Stud Bolts
Governing Fastener Standards
- ASTM A193 / ASME SA193 Alloy Steel Hex Head Bolt
- ASTM A193 Alloy Steel Nut
- ASTM A320 Grade L7 / L7M
- ASTM A194 mating nut grades
Alloy Steel Fastener Size Range
- Metric M6 to M180
- Inch 1/4″ to 7″
- A193 Alloy Steel U Bolt custom radius
- Alloy Steel Industrial Threaded Bar to 6 m
Alloy Steel Fastener Product Form
- ASTM A193 Alloy Steel Hex Head Bolt
- Alloy Steel Square Bolts & Alloy Steel T Bolt
- Alloy Steel Counter sunk Bolt
- Alloy Steel Eye bolts & Alloy Steel Lag Bolt
Alloy Steel Fastener Delivery Condition
- Quenched & Tempered (Q+T)
- Full Hardness Survey, Bar Over 1″
- Individual Hardness Test On B7M
- Charpy Tested On L7 / L7M
Alloy Steel Fastener Testing Offered
- Hardness (HRC / HRB / HBW)
- PMI Spectro Analysis
- Charpy V-Notch (L7 / L7M)
- Third Party Inspection
Nut & Washer Range
- Alloy Steel Coupling Nut
- Alloy Steel Dome nuts & Alloy Steel Acorn Nuts
- Alloy Steel Shoulder Nuts & Alloy Steel Lock Nut
- Alloy Steel Wing Nut
Alloy Steel Fastener Packing
- Bundled By Size And Length
- Threads Capped & Oil Coated
- Fumigated Wooden Crates
- VCI Wrap For Sea Freight
Grades Covered Alloy Steel Dome nuts
Grade B7
- Chromium-Molybdenum, AISI 4140/4142
- Most common ASTM A193 Alloy Steel Nut and bolt grade
- Paired with ASTM A194 Grade 2H nut
Grade B7M
- Same chemistry as B7, lower hardness
- NACE MR0175 sour-service duty
- Every piece hardness tested, A194 2HM nut
Grade B16
- Chromium-Molybdenum-Vanadium alloy
- Rated for service above 450°C
- Used with A194 Grade 4 or 7 nut
Grade L7 / L7M (A320)
- Same base chemistry as B7 / B7M
- Charpy V-notch tested to -46°C (-101°F wording per A320)
- Low-temperature piping and LNG duty
Grades B5 / B6 / B6X
- 5-13% chromium martensitic grades
- Higher scaling resistance at heat
- Steam turbine and valve service
Grades S1 / S2 / S6
- Age-hardening precipitation grades
- Special elevated-temperature purpose bolting
- Supplied against confirmed drawing / spec
Need An ASME SA193 Alloy Steel Hex Head Bolt?Mail the grade, diameter and length – we quote B7, B7M or L7 the same day.
Types Of Alloy Steel Fasteners We Supply
An Alloy Steel Fastener Supplier in India stocks all common heads, nuts, and bar forms.
ASTM A193 Alloy Steel Hex Head Bolt
Grade B7
Alloy Steel Stud Bolts
Double End
A193 Alloy Steel U Bolt
M6-M180
Alloy Steel Square Bolts
Carriage
Alloy Steel Threaded Bar
Full Length
Alloy Steel Coupling Nut
Long Body
Alloy Steel Lock Nut
Nylon / All-Metal
Alloy Steel Eye bolts
Lifting
Alloy Steel Threaded Bar Chemical Composition
Grade-Wise Chemistry Under ASTM / ASME A193
Ladle chemical composition limits (%) for each alloy steel grade we forge and stock. Iron (Fe) is balance in every grade.
| Grade | C | Mn | P Max | S Max | Si | Cr | Mo | Other |
|---|---|---|---|---|---|---|---|---|
| B5 | 0.10 max | 1.00 max | 0.040 | 0.030 | 1.00 max | 4.00 – 6.00 | 0.40 – 0.65 | – |
| B6 | 0.08 – 0.15 | 1.00 max | 0.040 | 0.030 | 1.00 max | 11.50 – 13.50 | – | – |
| B6X | 0.15 max | 1.00 max | 0.040 | 0.030 | 1.00 max | 11.50 – 13.50 | – | Ni 0.60 max |
| B7 | 0.37 – 0.49 | 0.65 – 1.10 | 0.035 | 0.040 | 0.15 – 0.35 | 0.75 – 1.20 | 0.15 – 0.25 | – |
| B7M | 0.37 – 0.49 | 0.65 – 1.10 | 0.035 | 0.040 | 0.15 – 0.35 | 0.75 – 1.20 | 0.15 – 0.25 | Same chemistry as B7, lower hardness spec |
| B16 | 0.36 – 0.47 | 0.45 – 0.70 | 0.035 | 0.040 | 0.15 – 0.35 | 0.80 – 1.15 | 0.50 – 0.65 | V 0.25 – 0.35 |
| L7 (A320) | 0.37 – 0.49 | 0.65 – 1.10 | 0.035 | 0.040 | 0.15 – 0.35 | 0.75 – 1.20 | 0.15 – 0.25 | Charpy V-notch tested |
| L7M (A320) | 0.37 – 0.49 | 0.65 – 1.10 | 0.035 | 0.040 | 0.15 – 0.35 | 0.75 – 1.20 | 0.15 – 0.25 | Charpy tested + 100% hardness tested |
Alloy Steel Shoulder Nuts Mechanical Properties
Grade-Wise Tensile, Yield & Hardness Values
Quenched and tempered mechanical properties by grade and diameter meet ASTM ASME A193 and A320.
| Grade | Diameter Range | Tensile Strength Min | Yield Strength Min | Elongation Min (4D) | RA Min | Hardness Max |
|---|---|---|---|---|---|---|
| B5 | Up to 4″ (100 mm) | 100 ksi / 690 MPa | 80 ksi / 550 MPa | 16% | 50% | 235 HB / 99 HRB |
| B6 | Up to 4″ (100 mm) | 110 ksi / 760 MPa | 85 ksi / 585 MPa | 15% | 50% | 321 HB / 35 HRC |
| B6X | Up to 4″ (100 mm) | 110 ksi / 760 MPa | 85 ksi / 585 MPa | 15% | 50% | 321 HB / 35 HRC |
| B7 | Up to 2-1/2″ (64 mm) | 125 ksi / 860 MPa | 105 ksi / 720 MPa | 16% | 50% | 321 HB / 35 HRC |
| 2-5/8″ to 4″ | 115 ksi / 795 MPa | 95 ksi / 655 MPa | 16% | 50% | 321 HB / 35 HRC | |
| 4-1/8″ to 7″ | 100 ksi / 690 MPa | 75 ksi / 515 MPa | 18% | 50% | 321 HB / 35 HRC | |
| B7M | All sizes to 4″ | 100 ksi / 690 MPa | 80 ksi / 550 MPa | 16% | 50% | 235 HB / 99 HRB (piece-wise tested) |
| B16 | Up to 2-1/2″ (64 mm) | 125 ksi / 860 MPa | 105 ksi / 720 MPa | 18% | 50% | 321 HB / 35 HRC |
| L7 (A320) | Up to 2-1/2″ (64 mm) | 125 ksi / 860 MPa | 105 ksi / 720 MPa | 16% | 50% | 321 HB / 35 HRC + Charpy 20 ft-lb avg @ -150°F |
| L7M (A320) | All sizes to 4″ | 100 ksi / 690 MPa | 80 ksi / 550 MPa | 16% | 50% | 235 HB / 99 HRB + Charpy 20 ft-lb avg @ -150°F |
A193 Alloy Steel U Bolt Torque Chart
Refer Torque Chart Before Tightening
ASTM A193 omits torque; the reference below follows ISO 898-1 for nearest alloy grades.
| Size | Class 8.8 Equivalent | Class 10.9 Equivalent (Near B7M) | Class 12.9 Equivalent (Near B7) |
|---|---|---|---|
| M6 | 11.8 | 17.0 | 19.9 |
| M8 | 28.8 | 41.3 | 48.3 |
| M10 | 57.3 | 81.8 | 95.7 |
| M12 | 99.8 | 143 | 167 |
| M16 | 248 | 354 | 413 |
| M20 | 500 | 690 | 809 |
| M24 | 865 | 1195 | 1395 |
| M30 | 1719 | 2377 | 2774 |
Alloy Steel Fastener Equivalent Grades
One Chemistry, Several Nameplates
ASTM A193 Grade B7 shares its base 4140/4142 chemistry with fastener steels recognised under other national standards.
ASTM / SAE / AISI
- ASTM A193 Grade B7 / B7M
- ASTM A320 Grade L7 / L7M
- SAE / AISI 4140, 4142, 4145
DIN / Werkstoff
- DIN 42CrMo4
- Werkstoff Nr. 1.7225
- DIN 25CrMo4 (near B7M carbon range)
EN / BS
- EN 10269 elevated-temperature bolting scope
- EN 42CrMo4
- BS 1501-640B (near B16 chemistry)
JIS
- JIS G4053 SCM440
- JIS SCM4 (near B16 chemistry)
- Close chemistry match, confirm hardening cycle
Mating Nut Standards
- ASTM A194 Grade 2H (for B7)
- ASTM A194 Grade 2HM (for B7M)
- ASTM A194 Grade 4 / 7 (for B16)
Indian Market Note
- No single IS number replaces A193
- Ordered directly as A193 grade
- Chemistry cross-checked against IS 1367 property class where relevant
Physical Properties Of Alloy Steel Industrial Threaded Bar
Density
7.85 g/cm³
0.284 lb/in³
Melting Point
~1416 °C
~2581 °F, typical for 41xx alloy steel
Modulus Of Elasticity
200 – 210 GPa
29,000 – 30,500 ksi range
HSN & GST
HSN 7318
18% GST on bolts, nuts & threaded fasteners
Buy ASTM A193 Alloy Steel Nut and Bolt in Metric Sizes with PTFE, Teflon, and Chrome Plated Coating
Alloy Steel T Bolt Surface Coating & Finish Options
Match The Coating To The Environment
Alloy Steel Bolt and Alloy Steel Nut materials remain unchanged, finishes manage corrosion and friction.
PTFE Coated
Teflon Coated
Xylan Coated
Chrome Plated
Hot-Dip Galvanized
Zinc / Zinc-Nickel Plated
Black Oxide
Bright / Plain Machined
Application Of Alloy Steel Wing Nut
Where This Chromoly Bolting Goes To Work
An Alloy Steel Fastener earns its BOM place for high tensile loads at temperature.
Flange & Pipe Joint Bolting
Valves, Pumps & Fittings
Pressure Vessels & Boilers
Refinery & Petrochemical Plant
Pipe Support & Tower U Bolts
Structural Steel Connections
Power & Fertilizer Plants
Offshore & Marine Bolting
Alloy Steel Fastener Monthly Delivery In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
|
South America | Port of Callao | 49 Days |
|
Asia | Port of Busan | 15-50 Days |
Alloy Steel Lock Nut Threading & Dimensional Standards
Fit Confirmed Before Cutting
Threading and nut geometry follow international dimensional standards, separate from the A193 material spec.
Thread Series
- Metric Coarse – ISO 724 / ISO 261
- UNC / UNF – ASME B1.1
- 8 TPI Series Above 1″ Diameter
Bolt & Stud Dimensions
- ASME B18.2.1 Hex Bolts & Screws
- ASME B16.5 Stud Length Chart
- DIN 976 Threaded Bar / Studding
Nut & Washer Dimensions
- ASME B18.2.2 Heavy Hex Nuts
- ASTM F436 Hardened Washer
- DIN 934 / DIN 6330 Metric Nuts
Alloy Steel vs Stainless Steel Fastener
This Alloy Steel Fastener supplier in India weighs A193 bolt strength against B8 corrosion.
Alloy Steel Fastener (Grade B7)
- Tensile 860 MPa (125 ksi) min
- Lower material cost per kg
- Needs coating for outdoor corrosion life
- Preferred for flanges, valves, structural bolting
- Rated to about 450°C service
Stainless Steel Fastener (Grade B8)
- Tensile 515 MPa (75 ksi) min, Class 1
- Higher material cost per kg
- Naturally corrosion & oxidation resistant
- Preferred for chemical, marine, food-grade duty
- Rated for both high and cryogenic service
Grade B7 vs B7M vs L7 Selection Guide
| Grade | Max Hardness | Testing | Typical Use |
|---|---|---|---|
| B7 | 321 HBW / 35 HRC | Lot-wise hardness | General flange & valve bolting |
| B7M | 235 HB / 99 HRB | Every piece hardness tested | Sour / NACE MR0175 service |
| L7 (A320) | 321 HBW / 35 HRC | Charpy V-notch at low temp | Cryogenic & sub-zero piping |
A193 Alloy Steel U Bolt Manufacturing & Heat Treatment
From Bar To Finished Fastener
A quick look at how AISI 4140 / 4142 bar becomes a finished A193 Alloy Steel Bolt leaving our works.
Forging / Bar Cutting
Bar stock cut to length or hot forged for larger heads
Thread Rolling / Machining
Rolled or cut threads to metric or UNC pitch
Quench & Temper
Oil quenched and tempered at 593°C minimum
Inspection
Chemistry, hardness and dimensional cleared
Coating & Dispatch
Coated as ordered, bundled and shipped with MTC
Alloy Steel Acorn Nuts Testing & Test Certification
An experienced alloy bolting manufacturer tests every lot before it is bundled for dispatch.
Hardness Test
HRC / HRB / HBW readings recorded lot wise, piece wise on B7M
Chemical / PMI Analysis
Spectro reading against ASTM A193 composition limits
Charpy V-Notch
Sub-zero impact test performed on L7 / L7M lots
Dimensional Inspection
Thread gauge, length and head/nut geometry checked
Proof Load / Tensile Test
Sample bolts pulled to verify tensile and yield values
Third Party Inspection
SGS, BV, TUV or Lloyd’s arranged before dispatch
Alloy Steel Lag Bolt Documentation
Mill Test Certificate (EN 10204 3.1)
Chemistry, hardness and tensile results against ASTM A193 limits
Every Order
Hardness & Dimensional Report
Recorded per lot, per piece on B7M and L7M orders
Every Order
Torque & Clamp Load Reference Sheet
Diameter-wise torque values for the U Bolt or stud ordered
On Request
Certificate Of Origin
Chamber attested for customs clearance abroad
Export Orders
Packing List & Tax Invoice
Piece count, net/gross weight, HSN 7318 and GST
Every Order
ASME SA193 Alloy Steel Hex Head Bolt Packaging
Threads Oiled & Capped
Rust-preventive oil applied, thread ends protected in transit
Size-Wise Bundling
Bolts, studs and nuts bundled and tagged by size and grade
Wooden Case / Carton
Fumigated wooden crates or heavy-duty cartons on pallets
VCI Wrap For Sea Freight
Vapour-corrosion-inhibitor wrap added on export shipments
Alloy Steel Fastener Price In India
What Moves Your Per-Piece Rate
There is no fixed price per kg for Alloy Steel Fastener – the levers below decide the number on your quotation.
Send a size-wise quantity list. You get per-piece pricing inside 24 hours with HSN, GST and packing weight already worked out on the quotation.
Ready Stock, MOQ & Dispatch Lead Time
From Enquiry To Gate Pass
No hidden waiting. This is the actual clock on an Alloy Steel Fastener order.
Day 0 – Enquiry
Mail the grade, size and quantity list to our Mumbai desk
Day 1 – Quote
Per-piece rate with HSN, GST and packed weight
Day 3 – Inspection
Hardness, PMI and dimensional cleared, TPI called if needed
Day 5 – Dispatch
Rack sizes leave with LR copy and full document set
Rack Stock
M6 – M64
Grade B7 hex bolts, studs and U bolts held in Mumbai
Minimum Order
100 Pcs
Per size, trial lots considered on request
Large Dia Lead Time
10 – 15 Days
Above M64, forged and machined against order
Export Transit
Nhava Sheva
Air or sea, FOB CFR CIF DDP quoted
Weekly Delivery Of Alloy Steel Fastener To Below Countries
| Export To | Countries | Continent | Shipping Time | Ports |
|---|---|---|---|---|
 |
United Arab Emirates | Asia | 8 Days | Jebel Ali Port |
 |
Saudi Arabia | Asia | 10 Days | Dammam Port |
 |
United States | North America | 32 Days | Port of Houston |
 |
United Kingdom | Europe | 25 Days | Port of Felixstowe |
Alloy Steel Fastener Frequently Asked Questions
What is an alloy steel bolt in our Alloy Steel Bolts range?
A fastener made from chromium-molybdenum alloy steel, quenched and tempered for higher strength.
What is alloy steel used for in an ASTM A193 Alloy Steel Hex Head Bolt?
For fasteners, shafts, gears and bolting needing higher strength or heat resistance.
Is alloy steel expensive for Alloy Steel Square Bolts?
Costs more than carbon steel but less than stainless or nickel alloy bolting.
Is alloy steel different than steel in an Alloy Steel Stud?
Yes, alloy steel adds chromium, molybdenum or vanadium to plain carbon steel.
What is the HSN code for Alloy Steel Nuts?
HSN 7318, invoiced at 18 percent GST for Indian buyers.
Learn About Our Distribution Network
| 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 |