A320 L7M Stud Bolts Core Strengths
Mortec Capabilities
Established
Since 2012 • 15+ yrs experience
Manufacturing Units
2 in-house units • Taloja & Mazgaon
Stockyard Area
8,850+ sq.ft • Ready-stock inventory
Certifications
ISO 9001:2015, PED • GST, IEC & MSME
Clientele
100+ clients • India & export markets
Export Reach
15+ countries • Europe, GCC & APAC
Testing Offered
Hardness, chemical & impact • MTC EN 10204 3.1 & 3.2
Shipment Documents
Invoice, Packing List • COO, COI, MTC, BL & Lab Report
Table of Content
NACE Certified ASME SA 320 Grade L7M Stud Bolts Manufacturer in India At Wholesale Refinery Rates
Critical low temperature and sour gas applications leave zero room for error. Buyers across GCC Africa and Americas trust our strong A320 bolts. We test every single fastener part instead of basic batch sampling. Our team delivers hundred percent Brinell hardness stamped hex bolts daily. Complete compliance with NACE MR0175 and ISO standards is fully guaranteed. Every shipment includes full Mill Test Certification for absolute product reliability. Direct forge sourcing eliminates extra trader markups for optimal customer value. Ex stock inventory ships within days in secure export ready packaging. Direct factory pricing ensures faster response times for all your requirements.
ASTM A320 L7M Bolts Specification
Get factory-direct quotes with full MTC-certified A320 L7M bolts shipped globally—no middlemen.
ASTM A320 L7M Bolts Size Range
- ¼″ to 4″ diameter
- M6 to M100 metric
- Full mechanical table up to 2½″
ASME SA 320 Gr. L7M Thread & Head
- Hex head, heavy hex, stud bolt
- UNC, UNF, 8UN thread series
L7M Bolt Governing Standards
- ASTM A320 / ASME SA-320
- UNS G41400 / DIN 1.7225
L7M Bolt Dimensional Standards
- ASME B18.2.1 (Bolts)
- ASME B18.2.2 (Nuts)
- DIN 931 / DIN 933
ASTM A320 L7M Bolt Finish
- Plain (black), Hot-Dip Galvanized
- PTFE, Xylan, Zinc-Nickel coating
L7M Bolt Testing & Documentation
- 100% Hardness, Charpy Impact, PMI
- MTC, Chemical Report, TPI on request
L7M Sour Service Compliance
- NACE MR0175 / MR0103
- ISO 15156-3 Annex A qualified
L7M Bolt Supporting Material
- A194 Gr. 7M nuts, F436 washers
- Bubble wrap & anti-tarnish export pack
A320 L7M Bolt Manufacturing Origin
- Indian, European mills
- Origin certificate on request
From Houston To Mexico City - ASTM A320 L7M Bolts On Demand
Ex-stock supply lines serving North and South American refinery and oilfield maintenance.
Toronto, Canada
Houston, United States
Mexico City, Mexico
Maracaibo, VenezuelaTypes of ASTM A320 L7M Bolt
We are a leading ASTM A320 Grade L7M stud bolt supplier in India, backed by ex-stock inventory across all common forms.
ASTM A320 L7M Stud Bolts
ASTM A320 • M6-M100- Continuous and double-end threaded studs
- Low-temperature and sour service duty
ASTM A320 Gr. L7M Hex Head Bolts
ASME B18.2.1 • Metric and UNC- Full or half thread on request
- Max hardness HRC 25 per A320
L7M Hex Bolts
Heavy Hex • ASME B18.2.1- Matched to A194 Gr. 7M / 4M nuts
- Standard for flanged pressure joints
ASTM A320 Gr L7M Eye Bolts
Shoulder and Non-Shoulder- Lifting and anchoring applications
- Custom eye diameter on request
Grade L7M U-Bolts
Round and Square Bend- Pipe clamp and support duty
- Supplied with matching nuts
A320 L7M Allen Bolts
DIN 912 • Metric- Recessed hex drive for flush fitting
- Compact head for confined joints
L7M Grade Flange Head Bolts
Serrated & Non-Serrated- Integral washer face flange head
- Common in valve and pump body joints
ASTM A320 L7M Carriage Bolts
Round Head • Square Neck- Self-locking square neck under head
- Structural and fixture assembly use
Quality You Can Count On - ASTM A320 L7M Bolts Manufacturer In Mumbai
Send diameter, length and finish - we quote ex-stock and mill-order lead times within hours.
ASTM A320 L7M Bolts, Ex-Stock and Ready To Ship Across Europe
Container-ready shipments for buyers across Western and Southern Europe.
London, UK
Hamburg, Germany
Rotterdam, Netherlands
Milan, ItalyASTM A320 L7m Stud Bolts Chemical Composition
ASTM A320 L7M Bolts manufacturer in Mumbai heat-treats this Cr-Mo alloy steel for sour service.
| Element | Carbon | Manganese | Phosphorus, max | Sulfur, max | Silicon | Chromium | Molybdenum |
|---|---|---|---|---|---|---|---|
| Composition, % | 0.38–0.48C | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 | 0.80–1.10 | 0.15–0.25 |
NACE Verified – ASTM A320 L7M Bolts Supplier In India
Confirmed heats, hardness-tested lots, ready for coastal dispatch to your project site.
ASTM A320 L7M Bolts Mechanical Properties
Quenched and tempered at 1150°F (620°C) minimum, hardness tested on every part - ASTM A320 L7M Bolts manufacturer in India.
| Tensile Strength, min | Yield Strength, min (0.2% offset) | Elongation in 2″/50mm, min | Reduction of Area, min | Hardness, max | Hardness, min |
|---|---|---|---|---|---|
| 100 ksi [690 MPa] | 80 ksi [550 MPa] | 18% | 50% | 235 HBW / 99 HRB | 200 HBW / 93 HRB |
| Specimen Size | Avg. of 3 Specimens, min | Single Specimen, min (one only) |
|---|---|---|
| 10 x 10 mm (full size) | 20 ft-lbf [27 J] | 15 ft-lbf [20 J] |
| 10 x 7.5 mm | 16 ft-lbf [22 J] | 12 ft-lbf [16 J] |
What Makes L7M Different
Need Certified Mechanical Data?
Share your size and quantity to receive a fast quote complete with heat-specific test data (tensile, hardness, Charpy) for NACE and MOC review.
Request Test ReportServing The Gulf - ASTM A320 L7M Bolts Exporter In India
Container-ready packing and full export paperwork move with every consignment.
ASTM A320 L7M Bolts Material Equivalent
Base-steel equivalents match parent chemistry only, not ASTM A320 temper or impact specs.
United States
- ASTM A320 / ASME SA-320 Grade L7M
- UNS G41400
- AISI/SAE 4140
Germany / EU
- Werkstoff Nr. 1.7225
- DIN EN 42CrMo4
- Base chemistry match only
United Kingdom
- BS 708M40
- EN19-family Cr-Mo steel
- Requalify to A320 for temper/impact
ASTM A320 L7M Bolts Sour Service Compliance
ASTM A320 L7M Bolts suppliers in Mumbai qualify every lot for sour service.
ASTM A320 L7M Bolts Hardness Testing & Marking
Unlike most grades, every L7M part is individually hardness stamped by our ASTM A320 L7M Bolts exporter in India.
Testing Rule
Head Marking
ASTM A320 L7M Bolts Hot-Dip Galvanizing & Coating Options
ASTM A320 does not prohibit galvanizing L7M bolts, but the matching nut is the real constraint - here is how buyers usually solve it.
Galvanized L7M Bolt
- Bolt itself can be hot-dip galvanized
- No re-machining needed on the bolt shank
- Suited to onshore, non-buried structural use
A194 Gr. 7M Nut Constraint
- Threads cannot be re-cut after galvanizing
- Final stress relief must follow all tapping
- PTFE or Xylan coating avoids this conflict
Recognized Worldwide - ASTM A320 L7M Bolts Exporter In India
NACE-documented dispatches to Jebel Ali, Dammam and Sohar with full export paperwork on file.
ASTM A320 Grade L7 vs L7M
Same chemistry, different temper - choosing the wrong one either under-rates your strength or fails your sour-service audit.
Grade L7
- Yield 105 ksi [724 MPa] min
- Tensile 125 ksi [862 MPa] min
- Hardness max 321 HBW / 35 HRC
- Tempering 1100°F [593°C] min
- Charpy at -150°F [-101°C]
- Not NACE sour-service qualified as-is
Grade L7M
- Yield 80 ksi [550 MPa] min
- Tensile 100 ksi [690 MPa] min
- Hardness max 235 HBW / 99 HRB
- Tempering 1150°F [620°C] min
- Charpy at -100°F [-73°C]
- NACE MR0175 / ISO 15156-3 qualified
ASTM A320 L7M Bolts Applications
ASTM A320 L7M Bolts exportors in Mumbai serve every application listed here.
Preferred Choice For ASTM A320 L7M Bolts Supplier In India
Domestic buyers get the same 100%-tested lot documentation as our export orders.
ASTM A320 L7M Bolts Country-Wise Supply
Ex-stock inventory ready for fast dispatch to the Gulf. We ship confirmed L7M orders to the Middle East within 48 hours.
Dubai, UAE
Jubail, KSA
Istanbul, TurkeyLooking To Get PMI Reports With Your Bolt Order?
Every heat ships with EN 10204 3.1 documentation - ask for 3.2 third-party witnessed on request.
ASTM A320 L7M Bolts, Ex-Stock and Ready To Ship Across Africa & APAC
Container-ready shipments for buyers across East Africa and Southeast Asia.
Johannesburg, South Africa
Kampala, Uganda
Singapore
Bangkok, Thailand
Kuala Lumpur, Malaysia
Manila, Philippines
Jakarta, Indonesia
Ho Chi Minh City, VietnamHow Fast Your L7M Order Leaves Mumbai
Confirmed orders ship fast—choose your freight route below (actual transit varies by discharge port).
Ex-Stock Dispatch
Ready sizes leave our Mumbai stockyard in 2–5 working days
Sea Freight
Most economical route, 1–4 weeks transit and varies by destination
Air Freight
3–7 days for shutdown-critical or breakdown replacement orders
Country-Specific ETA
Share your discharge port for a locked delivery date on your PO
ASTM A320 L7M Bolts Domestic Supply Across India
Same-week ex-stock delivery to India's leading fabrication and process equipment hubs.
MumbaiAhmedabadBengaluruChennaiPuneASTM A320 L7M Bolts FAQs
Quick answers to the questions buyers ask us most before placing an order.
What sizes are ASME SA 320 Grade L7M Stud Bolts available in?
- ¼″ to 4″ (M6 to M100 metric)
- L7M Hex Bolts covered up to 2½″ diameter
- Grade L7m U Bolts fall in the same size band
- ASTM A320 l7m stud bolts made to buyer spec beyond standard range
What is the chemical composition of ASTM A320 L7M Carriage Bolts?
- Carbon 0.38–0.48%
- Manganese 0.75–1.00%
- Silicon 0.15–0.35%
- Chromium 0.80–1.10%
- Molybdenum 0.15–0.25%
- P & S capped at 0.035% / 0.040%
- Matches the ASTM A320 L7m Chemical Composition datasheet for ASTM A320 Grade L7m Material
What is the difference between ASTM A320 Grade L7 and Grade L7M?
- ASTM A320 grade l7 vs l7m: same base chemistry
- L7M capped at 235 HBW vs L7’s 321 HBW
- Better sour-gas cracking resistance
- Lower ASTM A320 L7m Yield Strength than L7
- Full values in ASTM A320 L7m Mechanical Properties and ASTM A320 L7m Material Properties tables
Are Grade L7m U Bolts NACE MR0175 compliant?
- Yes - listed in NACE MR0175 / ISO 15156-3 Annex A
- Every part hardness tested to 235 HBW ceiling
- Must be paired with A194 Grade 7M nuts
- Applies to ASTM A320 Gr L7M Eye Bolts as well
What is the price basis for A320 L7M Allen Bolts?
- Quoted per kg vs day’s alloy steel rate
- Varies with size, length, testing & coating
- L7M Grade Flange Head Bolts and ASTM A320 Gr. L7M Hex Head Bolts priced on same basis
- Ask for ASTM A320 L7m Equivalent grades if L7M is not in stock
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