What Makes Ganpat Industrial Corporation The Go-To Name For Alloy Steel B7 Bolt?
24-Hour Quotation
Send diameter, length and grade before 6 PM IST for next-morning pricing
Heat-Traceable Chrome-Moly
Every B7 stud carries a heat number back to its mill test certificate
Plain & PTFE Coated Form
Black oxide, zinc, xylan and PTFE coated B7 fasteners held on rack
Same-Week Dispatch
Rack sizes leave Mumbai within 5 working days of PO release
Zero Rejection Cost
Hardness, PMI and dimensional checks cleared before every dispatch
Alloy Steel B7 Bolt Features
- 1Material Basis: ASTM A193 Grade B7 • Chromium-Molybdenum Alloy Steel • UNS G41400
- 2Governing Standard: ASTM A193 / ASME SA193 Grade B7 • Matching A194 Grade 2H Nut
- 3Size Range: 1/4″ to 4″ diameter • UNC below 1″, 8-UN series above 1″
- 4Form: Stud Bolt, Hex Bolt, Square Bolt, Threaded Bar / Rod, U-Bolt, J-Bolt, Anchor Bolt
- 5Equivalents: DIN 1.7225 (42CrMo4) • JIS SCM440 / SNB7 • Raw material AISI 4140 / 4142
- 6Finish Offered: Plain Black, Zinc Plated, Xylan & PTFE Coated Alloy Steel B7 Bolt
Mumbai works desk • WhatsApp +91 85912 64209 • Rack sizes dispatch the same week
Ganpat Industrial Corporation stocks and supplies the Alloy Steel B7 Bolt. We serve industrial buyers from our Mumbai works since 1997. Grade B7 is a quenched and tempered chromium-molybdenum alloy steel. It combines high tensile strength with a controlled maximum hardness. This makes it the default fastener grade on flanged piping joints. Applications span refineries, fertiliser plants, and power stations. Every batch of B7 Alloy Steel Bolts leaves our stockyard. B7 Alloy Steel Studs are cut against ASTM A193 Grade B7 requirements. Every Alloy Steel B7 Threaded Rod is threaded to these requirements. They pair with Alloy Steel B7 Nuts built to ASTM A194 Grade 2H. Plain black, zinc plated, xylan and PTFE coated finishes are held on rack. We ship from Mumbai to Chennai, Vadodara and Kandla. We export Chrome Moly B7 fasteners to Dubai, Dammam, Houston, Rotterdam and Singapore.
Mumbai · Chromium-Molybdenum Bolting Stockist & Exporter
Alloy Steel B7 Bolt Built To Hold Its Torque Through Every Heat Cycle On The Line
Ganpat Industrial is a trusted Alloy Steel B7 Bolt Supplier in India dispatching from Mumbai. We stock ASTM A193 Grade B7 Stud Bolts and B7 Alloy Steel Nuts with EN 10204 3.1 certification.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
Superior ASTM A193 Grade B7 Stud Bolts Manufacturer in India with Plain & Coated Form
Specification Of Alloy Steel B7 Bolt
Order Sheet In One Glance
Everything a buyer normally emails us before placing a purchase order for Alloy Steel B7 Bolts.
Alloy Steel B7 Bolt Material Basis
- ASTM A193 Grade B7
- Chromium-Molybdenum Alloy Steel
- Raw Material AISI 4140 / 4142
- UNS G41400
Governing Bolting Standards
- ASTM A193 / ASME SA193 B7
- ASTM A194 Grade 2H Nut
- ASME B18.2.1 Bolt Dimensions
- ASME B1.1 Thread Series
Alloy Steel B7 Bolt Size Range
- 1/4″ to 4″ Diameter
- UNC Below 1″, 8-UN Above 1″
- Custom Length Cut To Drawing
- Metric M6 To M100 On Request
Alloy Steel B7 Bolt Form
- Stud Bolt, Hex Head Bolt
- Square, Allen & T-Bolt
- Threaded Bar / Rod
- U-Bolt, J-Bolt, Anchor Bolt
Alloy Steel B7 Bolt Delivery Condition
- Quenched & Tempered (Q+T)
- Min Temper Temp 593°C
- Hardness 35 HRC Max
- Full & Partial Thread
Alloy Steel B7 Bolt Finish
- Plain Black Oxide
- Zinc / Hot-Dip Galvanised
- Xylan & PTFE Coated
- Cadmium On Request
Alloy Steel B7 Bolt Testing Offered
- Hardness (HRC / HBW)
- PMI Spectro Analysis
- Proof Load & Tensile Test
- Third Party Inspection
Matching Range Supplied
- A194 2H Alloy Steel B7 Nut
- Hardened Flat & Spring Washers
- B7M For NACE / Sour Service
- A320 L7 For Low Temperature
Alloy Steel B7 Bolt Packing
- Bundled With Steel Strips
- Poly Bags Per Size, Per Length
- Fumigated Wooden Crates
- VCI Wrap For Sea Freight
Types Of Alloy Steel B7 Fasteners We Supply
As an Alloy Steel B7 Bolt Supplier in India holds all common heads, sections and forms.
ASTM A193 Alloy Steel Hex Head Bolt
A193 B7
Alloy Steel B7 Stud Bolts
Full Thread
Alloy Steel B7 Allen Bolt
Socket Head
Alloy Steel B7 J Bolt
J-Shape
A193 Chrome Moly B7 U Bolt
Pipe Clamp
Alloy Steel B7 Anchor Bolt
Foundation
Alloy Steel B7 Eye Bolts
Lifting
Alloy Steel B7 Threaded Bar
Continuous
Need Alloy Steel B7 Industrial Threaded Bar In Bulk?Mail the diameter, length and quantity – we quote continuously threaded B7 bar cut to drawing the same day.
ASTM A193 B7 Alloy Steel Nut Size Chart
| Nominal Diameter | Thread Series | Threads Per Inch | Matching A194 2H Nut A/F |
|---|---|---|---|
| 1/4″ | UNC | 20 | 7/16″ |
| 3/8″ | UNC | 16 | 9/16″ |
| 1/2″ | UNC | 13 | 7/8″ |
| 5/8″ | UNC | 11 | 1.1/16″ |
| 3/4″ | UNC | 10 | 1.1/4″ |
| 7/8″ | UNC | 9 | 1.7/16″ |
| 1″ | UNC | 8 | 1.5/8″ |
| 1.1/4″ | 8-UN | 8 | 2″ |
| 1.1/2″ | 8-UN | 8 | 2.3/8″ |
| 2″ | 8-UN | 8 | 3.1/8″ |
| 3″ | 8-UN | 8 | 4.5/8″ |
| 4″ | 8-UN | 8 | 6″ |
Manufacturing Process Of B7 Fasteners
From Bar Stock To Finished Fastener
A quick look at how AISI 4140 bar stock becomes a finished Alloy Steel B7 Bolt leaving our works.
Bar Forming
4140 bar hot forged or cold headed to fastener shape
Thread Rolling
UNC or 8-UN threads rolled to ASME B1.1 pitch
Quench & Temper
Liquid quenched, tempered above 593°C for strength
Inspection
Hardness, PMI, dimensional and proof load cleared
Coat & Dispatch
Plain, zinc or PTFE coated, bundled with MTC
Alloy Steel B7 Bolt vs B7M Bolt
A B7 fastener maker tempers them to different hardness ceilings for different service duty.
Alloy Steel B7 Bolt
- Up to 35 HRC maximum hardness
- 125 ksi tensile up to 2-1/2″ diameter
- Standard grade for general process piping
- Paired with A194 2H heavy hex nut
- Not recommended for H2S sour service
Alloy Steel B7M Bolt
- 22 HRC maximum hardness (restricted)
- Same 100 – 125 ksi tensile range by size
- Specified where NACE MR0175 applies
- Paired with A194 2HM nut
- Resists sulfide stress cracking in sour gas
Alloy Steel B7 Bolt Monthly Delivery In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
 Brazil |
South America | Port of Callao | 49 Days |
 Singapore |
Asia | Port of Busan | 15-50 Days |
Alloy Steel B7 Square Bolts Equivalent Grades
ASTM / UNS
- ASTM A193 Grade B7
- UNS G41400
- Raw Stock AISI 4140 / 4142
DIN / Werkstoff
- DIN 1.7225
- 42CrMo4
- Close chemistry match
JIS
- JIS G4107 SNB7
- JIS G4105 SCM440
- Bolting material designation
Companion Nut Standard
- ASTM A194 Grade 2H
- A194 Grade 2HM (Sour Service)
- Heavy Hex Series
Nearby A193 Grades
- B7M (Restricted Hardness)
- B16 (Vanadium Added, Higher Temp)
- A320 L7 (Low Temperature)
Indian Market Note
- No single-number BIS equivalent
- Compared on chemistry basis
- Ordered directly as Grade B7
Alloy Steel B7 J Bolt Chemical Composition
IronFe
Balance
CarbonC
0.37 – 0.49%
ManganeseMn
0.65 – 1.10%
ChromiumCr
0.75 – 1.20%
MolybdenumMo
0.15 – 0.25%
SiliconSi
0.15 – 0.35%
SulphurS
0.040% max
PhosphorusP
0.035% max
Alloy Steel B7 Stud Mechanical Properties
The Numbers Your Inspector Will Ask For
ASTM A193 scales Alloy Steel B7 Bolts properties, larger diameters carry lower guaranteed strength.
Tensile Strength (up to 2-1/2″)
125 ksi
860 MPa Min
Yield Strength (up to 2-1/2″)
105 ksi
720 MPa Min
Elongation In 2″ (up to 2-1/2″)
16%
Min
Reduction Of Area
50%
Min, All Sizes
2-5/8″ To 4″ Diameter
115 / 95 ksi
Tensile / Yield, 16% elongation, 50% RA min
4-1/8″ To 7″ Diameter
100 / 75 ksi
Tensile / Yield, 18% elongation, 50% RA min
Minimum Tempering
593°C
1100°F, held after oil or water quench
Max Service Temperature
~450°C
840°F practical upper limit for B7 duty
Buy Chrome Moly B7 Nut and Stud in Various Sizes At Fair Price for High-Temperature
B7 Alloy Steel Coupling Nut Hardness & Heat Treatment
An Alloy Steel B7 Bolts Manufacturer in India ensures quenched and tempered strength-toughness balance.
Max Hardness
35 HRC
321 HBW maximum, all diameters
Heat Treatment
Quench & Temper
Liquid quench then temper above 593°C
Sour Service Variant
B7M
22 HRC max for NACE MR0175 compliance
Low Temperature Variant
A320 L7
Same chemistry, Charpy impact tested to -46°C
Physical Properties Of Alloy Steel B7 Dome nuts
Density
7.85 g/cm³
0.284 lb/in³
Melting Range
~1416 °C
~2580 °F, typical for 4140-family steel
Modulus Of Elasticity
200 GPa
~29,000 ksi
Poisson’s Ratio
0.27 – 0.30
Typical for low alloy steel
Alloy Steel B7 Nut Surface Coating & Finish Options
Match The Coating To The Site Condition
Plain and coated Alloy Steel B7 Bolts leave our works depending on corrosion exposure and torque-tension needs.
Plain Black Oxide Finish
Zinc Electroplated / Hot-Dip Galvanised
Xylan & PTFE Coated B7 Bolt
Cadmium Plated On Request
ASTM A193 B7 Alloy Steel Nut & Washer Pairing
Every Alloy Steel B7 Nut We Stock Against Your Stud Order
We stock the B7 Alloy Steel Nut required to torque any Alloy Steel B7 Bolt.
Alloy Steel B7 Hex Nut (A194 2H)
B7 Alloy Steel Coupling Nut
Alloy Steel B7 Dome Nuts & B7 Alloy Steel Acorn Nuts
Alloy Steel B7 Wing Nut
CrMo B7 Lock Nut
Alloy Steel B7 Panel Nut
B7 Alloy Steel Shoulder Nuts
Hardened Flat & Spring Washers
Need A Matched Alloy Steel B7 Nut Set?Order Alloy Steel B7 Bolts, Studs and A194 2H Nuts together on one purchase order – same-week dispatch.
Application Of B7 Alloy Steel Bolts
Where This Chrome-Moly Fastener Goes To Work
An Alloy Steel B7 Bolt earns its BOM place holding torque under heat and pressure.
Refinery & Petrochemical Piping
Pressure Vessels & Heat Exchangers
Flanged Valve & Fitting Joints
Power Plant Boiler Bolting
Structural Steel Assemblies
Compressor & Turbine Casing Bolts
Fertiliser & Chemical Plant Fittings
Offshore & Onshore Skid Bolting
ASTM A193 B7 Alloy Steel Nut Weight Chart
| Nominal Diameter | Cross Section (mm²) | Weight Per Metre (kg) |
|---|---|---|
| M6 / 1/4″ | 28.3 | 0.22 |
| M8 / 5/16″ | 50.3 | 0.39 |
| M10 / 3/8″ | 78.5 | 0.62 |
| M12 / 1/2″ | 113.1 | 0.89 |
| M16 / 5/8″ | 201.1 | 1.58 |
| M20 / 3/4″ | 314.2 | 2.47 |
| M24 / 1″ | 452.4 | 3.55 |
| M30 / 1.1/4″ | 706.9 | 5.55 |
| M36 / 1.1/2″ | 1017.9 | 7.99 |
| M42 / 1.3/4″ | 1385.4 | 10.88 |
Weekly Delivery Of Alloy Steel B7 Bolt In Below Location
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
 USA |
North America | Port of Savannah | 29 Days |
 Italy |
Europe | Port of Antwerp | 31 Days |
Alloy Steel B7 Bolt Price In India
What Actually Moves The Per-Kg Rate
Alloy Steel B7 Bolt price in India tracks a handful of order-specific factors, not a single fixed number.
Send a size-wise quantity list. You get per-kg 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 B7 Bolt order.
Day 0 – Enquiry
Mail the diameter, length and grade list to our Mumbai desk
Day 1 – Quote
Per-kg rate with HSN, GST and packed weight
Day 3 – Inspection
Hardness, PMI and proof load cleared, TPI called if needed
Day 5 – Dispatch
Rack sizes leave with LR copy and full document set
Rack Stock
1/4″ – 2″
Common bolt, stud and nut sizes held in Mumbai
Minimum Order
100 Kg
Per size, trial lots considered on request
Large Dia Lead Time
10 – 15 Days
Above 2″ NB, indented against order
Export Transit
Nhava Sheva
Air or sea, FOB CFR CIF DDP quoted
Testing Methods For Alloy Steel B7 Stud Bolts
This Alloy Steel B7 Bolts supplier in India tests every heat before demanding process joints.
Hardness Test
Rockwell C / Brinell readings recorded lot wise
Chemical / PMI Analysis
Spectro reading against ASTM A193 B7 chemistry limits
Tensile & Proof Load
Tensile, yield and proof load pulled to ASTM A193 minimums
Dimensional Inspection
Diameter, thread pitch and length checked against ASME B18.2.1
Heat Treatment Record
Quench and temper cycle logged per batch
Third Party Inspection
SGS, BV, TUV or Lloyd’s arranged before dispatch
Documentation For Alloy Steel B7 T Bolt
Chemical Analysis Report
Spectro reading against ASTM A193 Grade B7 composition limits
Every Order
Mechanical Test Report
Tensile, yield, elongation and hardness recorded lot wise
Every Order
Dimensional Inspection Sheet
Diameter, thread and length checked against ASME B18.2.1
Every Order
Certificate Of Origin
Chamber attested for customs clearance abroad
Export Orders
Packing List & Invoice
Piece count, net and gross weight, HSN and GST
Every Order
Alloy Steel B7 Bolt Frequently Asked Questions
What size range is available in Alloy Steel B7 Bolts?
Alloy Steel B7 Bolts are supplied from 1/4″ up to 4″ diameter.
What standard governs an ASTM A193 Alloy Steel Hex Head Bolt?
ASTM A193 Grade B7 sets its chemistry, heat treatment and mechanical properties.
Where are Alloy Steel B7 Square Bolts typically used?
They suit structural and machinery assemblies needing a non-rotating square head.
What is an Alloy Steel B7 J Bolt used for?
J Bolts anchor pipe supports, tanks and structural foundations to concrete.
What does a B7 Alloy Steel Coupling Nut do?
It joins two threaded rods or studs end-to-end for extended length.
We Collaborate With Traders in the 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 |