ASTM A194
Grade 8MLN
Stainless Steel Nuts
Why Grade 8MLN Matches Our B8MLN Studs
The logic behind Grade 8MLN mirrors what we cover in detail on our B8MLN/B8MLNA stud bolt page — molybdenum genuinely resists chloride-driven pitting and crevice corrosion, low carbon genuinely resists weld decay by preventing chromium carbide precipitation during welding, and nitrogen is added specifically to recover the strength that dropping carbon content would otherwise sacrifice. Three independent mechanisms, none interfering with the others, all present together in this single grade.
A nut manufactured from an unmatched material grade genuinely risks the bolted joint’s integrity — mismatched molybdenum content, differing carbon or nitrogen levels, or a subtly different mechanical response between stud and nut can affect thread engagement, clamping behavior, and both chloride and weld-decay resistance at the joint as a whole, particularly relevant here given this grade family exists specifically for demanding chloride-exposed, weld-critical service.
That’s exactly why we manufacture and supply this grade as the natural nut pairing for B8MLN and B8MLNA — same base material and three-property logic, verified together where ordered as a set, and available independently when only the nut side of an assembly needs replacing or supplementing.
Akbar Fasteners Pvt. Ltd. exports to over 50 countries, and our Grade 8MLN nut range is verified by chemical composition and mechanical testing under our ISO 9001:2015 quality system.
Where This Grade Genuinely Applies
Genuine Chloride Resistance
Molybdenum content delivers real resistance to chloride-driven pitting and crevice corrosion.
Genuine Weld-Decay Resistance
Low-carbon composition removes chromium carbide precipitation risk during welding.
Correct Default Pairing With B8MLN Studs
Matched material and mechanical properties for straightforward assembly compatibility.
Verified Chemical & Mechanical Properties
Batch testing confirms genuine molybdenum, carbon, and nitrogen levels for the ordered grade.
Choosing Between Related Stainless Nut Grades
Grade 8M
Genuine chloride resistance from molybdenum alone, without the low-carbon or nitrogen additions.
View Grade 8M →Grade 8MLN (This Page)
Molybdenum plus low-carbon weld-decay resistance plus nitrogen strength recovery — the direct match for B8MLN studs.
You Are HereGrade 8MLNA
The same three-property combination as this page, plus cold-worked strength on top.
View Grade 8MLNA →Grade 8M vs Grade 8MLN — Quick Reference
Confirming whether the joint is genuinely weld-critical, not just chloride-exposed, decides between the simpler baseline and the enhanced variant. This table is the quick reference we use with buyers before quoting.
| Aspect | Grade 8M (316) | Grade 8MLN (316LN) |
|---|---|---|
| Chloride Resistance | Genuine, from molybdenum | Identical to Grade 8M |
| Carbon Content | Standard | Low, weld-decay resistant |
| Nitrogen Addition | None | Controlled, strength-recovering |
| Best Suited For | Chloride exposure, non-weld-critical | Chloride exposure, weld-critical service |
Grade 8MLN Specification Details
Nominal Composition
- Chromium 16.0 – 18.0%
- Nickel 10.0 – 14.0%
- Molybdenum 2.0 – 3.0%
- Carbon ≤0.03%
Typical Mechanical Range
- Nitrogen Controlled Addition
- Condition Solution Annealed
- Proof Load Per ASTM A194 Grade 8MLN
- Weld-Decay Resistance Genuinely Improved
Fastener Types We Manufacture
- Hex Nuts Standard & Heavy Hex
- Jam Nuts Thin Profile
- Matching Studs ASTM A193 Grade B8MLN / B8MLNA
- Custom Sizes On Request
Application Areas
Wherever chloride exposure and weld-critical assembly are both genuinely present together.
Welded Marine & Offshore Structures
genuine weld-decay risk
Welded Pressure Vessel Flanges
resistant flange connections
Desalination Welded Process Equipment
process equipment
LNG & Cryogenic Welded Equipment
with chloride considerations
Standard Export Documentation
Prepared as standard practice for every Grade 8MLN nut shipment.
Mill Test Certificate (MTC)
Heat number, chemical composition, and mechanical property verification for every lot.
Chemical Composition Report
Confirms actual molybdenum, carbon, and nitrogen content fall within the specified 8MLN grade range.
Certificate of Conformance
Confirms the shipment matches the purchase order grade/size specification in full.
Certificate of Origin (COO)
Confirms India as country of manufacture for destination customs purposes.
NABL Accredited Test Reports
Independent mechanical, dimensional, and corrosion testing available on request.
Commercial Invoice & Packing List
Itemized value, Incoterm, and detailed carton/weight breakdown for customs clearance.
Internationally Recognised Standards Coverage
Related Fastener Grades & Materials
ASTM A193 Grade B8MLN / B8MLNA
Our direct matching stud bolt family for this same 316LN, three-property combination.
View B8MLN / B8MLNA Studs →ASTM A194 Grade 8MLNA
Our strain-hardened counterpart, adding cold-worked strength on top of this three-property combination.
View Grade 8MLNA →ASTM A194 Grade 8M
Our plain 316-based grade, chloride resistance alone without the weld-decay or strength additions.
View Grade 8M →Stainless Steel Fasteners Manufacturer India
Our broader stainless steel fastener manufacturing capability across all major grades.
View SS Manufacturer Guide →Chloride Exposure
Plus Weld-Critical Service?
Tell us your service environment and welding requirements — we’ll confirm whether Grade 8MLN genuinely fits, matched with our B8MLN/B8MLNA studs, and quote with full documentation. Akbar Fasteners Pvt. Ltd. responds within 24 hours.
Sales: +91 724 0000 733 · Support: +91 800 9315 333 · sales@akbarfasteners.in