ISO 9001 Certified AISI 440C Fastener Manufacturer Ex-Stock M3–M42, MTC EN 10204 3.1 & 3.2 Manufacturer Of Precision Fasteners Since 2012

Stainless Steel 440C Fasteners

Stainless Steel 440C Fasteners Spotlight

Grade / UNSAISI 440C / UNS S44004
Governing StandardASTM A276 Type 440C
Size RangeM3 to M42 • 1/8″ to 1.1/2″ dia
Alloying ElementsFe-Cr-C, 16–18% Cr, 0.95–1.20% C
Supply ConditionAnnealed or Hardened & Tempered
Forms In StockBolt, Nut, Stud, Screw, Washer, Rivet
MTC CertificateEN 10204 3.1 and 3.2
Thread SeriesUNC, UNF, Metric Coarse & Fine
Delivery TimeEx-Stock: Same Week • Made-To-Order: 3–5 Wks
Logistics BaseEx-Mumbai, Sea & Air Freight Worldwide
100% Traceable
Mill Test Certified
Heat-number chemistry and hardness records on every batch
Same-Week Dispatch
On Ex-Stock Sizes
Popular bolt and nut sizes leave our unit within days
ISO 9001:2015
Certified Manufacturer
Documented process control from bar to finished fastener
19 Countries
Export Track Record
GCC, Africa, Europe, Americas & Southeast Asia
Zero Middlemen
Mill-Direct Pricing
Direct ex-works pricing, no trader markup
Free Grade Check
Talk To Our Engineer
Confirm size, condition & hardness before you order
stainless steel 440c fasteners

 

0 · at glance

Mortec At A Glance

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 • GST, IEC & MSME

Clientele

100+ clients • India & export markets

Export Reach

19 countries • GCC, Africa & APAC

Testing Offered

Hardness, chemical & dimensional • MTC EN 10204 3.1 & 3.2

Shipment Documents

Invoice, Packing List • COO, COI, MTC, BL & Lab Report

ISO Approved AISI 440C Nuts & Bolt Manufacturer In India With MTC

AISI 440C is the hardest, most wear-resistant grade in stainless family. It outlasts ordinary stainless once heat treated. Buyers across Gulf, Africa and Americas trust us for ready stock. We supply bolts, nuts, studs and screws from in-house stock. Our in-house heat-treat and testing set-up keeps hardness consistent batch to batch.

Every 440C fastener leaves our facility with full mill documentation. Size and thread are verified before packing. Each order gets an export pack built for long-haul freight. As a direct manufacturer, we have no trading layer in between. We are SS 440C Fasteners Stockist Mumbai. Our grade desk confirms condition, hardness class and thread spec first. So what ships always matches what you specified.

01 · Specification

Stainless Steel 440C Fasteners Specification

Request direct quotes and original MTCs from an established worldwide AISI 440C fastener exporter.

stainless steel 440C fasteners specification  

SS 440C Fasteners Size Range

  • M3 to M42 metric
  • 1/8″ to 1.1/2″ dia (inch series)

UNS S44004 Thread & Dimensional Standards

  • ASME B18.2.1, B18.2.2, B18.3, B18.6.3
  • DIN 931/933/934/912, ISO 4014/4017/4032/4762

Type 440C Stainless Steel Base Material Standard

  • ASTM A276 Type 440C bar
  • UNS S44004 / AMS 5630

Martensitic Stainless 440C Supply Condition

  • Annealed, ≤269 HB
  • Hardened & Tempered, 58–60 HRC typical

AISI 440C Fastener Finish Options

  • Bright, passivated, black oxide
  • Electropolish on request

SUS 440C Testing & Documentation

  • Hardness, PMI, dimensional
  • MTC, salt-spray report, TPI on request

440C Stainless Steel Hex Nut Supporting Hardware

  • Matching nuts, washers, split pins
  • Anti-galling & anti-tarnish export pack

INOX 440C Manufacturing Origin

  • Indian & European mill bar stock
  • Origin certificate on request

Stainless Steel 440C Fasteners Manufacturer In Mumbai Since 2012

Send your drawing or size list - we quote ex-stock and made-to-order timelines the same day.

Request Quote Now
02 · Product Range

Stainless Steel 440C Fasteners Types

Stainless Steel 440C Fasteners manufacturer in India offering full ex-stock and made-to-order ranges.

AISI 440C Hex Bolt

440C Hex Bolt

DIN 931/933 • ASME B18.2.1
  • Full or partial thread
  • Hardened & tempered on request
Stainless Steel 440C Stud Bolt / Threaded Rod

440C Stud Bolt & Threaded Rod

Continuous & Double-End
  • Cut to any length
  • UNC, UNF or metric pitch
Stainless Steel 440C Hex Nut

440C Hex Nut

DIN 934 • ASME B18.2.2
  • Standard & heavy hex
  • Matched to bolt/stud pitch
Stainless Steel 440C Flat Washer

440C Flat Washer

DIN 125 • ISO 7089
  • Plain & spring washer
  • Load-spreading under head
Stainless Steel 440C Socket Head Cap Screw

440C Socket Head Cap Screw

DIN 912 • ISO 4762
  • High-torque internal hex drive
  • Compact head for tight bores
Stainless Steel 440C Machine Screw

440C Machine Screw

ASME B18.6.3
  • Slotted, Phillips or Torx drive
  • Fine thread for precision fit
Stainless Steel 440C U-Bolt

440C U-Bolt

Custom Radius & Length
  • Pipe, rail & clamp mounting
  • Supplied with nuts & plate
Stainless Steel 440C Rivet

440C Rivet

Solid & Blind Type
  • Permanent, high-wear joints
  • Custom head styles available
Stainless Steel 440C Dowel Pin

440C Dowel Pin

Ground & Hardened
  • Precision location & alignment
  • Tight h6/m6 tolerance available

Ready Stock Of UNS S44004 Stud And Socket Head Cap Screw For Food Service Applications At Best Prices

03 · Industries

Martensitic Stainless 440C Bolts Applications

Global industries prefer us as their 440C fastener supplier for fast, reliable dispatch.

Food Processing Equipment
Bearings & Precision Assemblies
Valves & Flow Control
Surgical & Dental Instruments
Pump & Compressor Components
Mold & Die Tooling
Marine Hardware, Mild Environments
Cutlery & Wear-Resistant Tooling
04 · Pricing

Stainless Steel 440C Fasteners Price Factors

For accurate quotes, share your variables with a trusted Stainless Steel 440C Fasteners supplier in India.

Chrome-Moly SurchargeBase bar cost tracks the ferrochrome and moly market.
Size & Thread PitchLarger diameter and finer thread raise machining time.
ConditionHardened & tempered costs more than annealed stock.
Testing LevelHardness reports, PMI or third-party inspection add cost.
05 · Size Chart

SS 440C fasteners Size Chart

Thread Dia (d)Coarse Pitch (mm)Wrench Size / AF (mm)Bolt Head Height (mm)
M30.505.52.0
M40.7072.8
M50.8083.5
M61.00104.0
M81.25135.5
M101.50177.0
M121.75198.0
M142.00229.0
M162.002410.0
M202.503013.0
M243.003615.0
M303.504619.0
M364.005523.0
M424.506526.0
06 · Cross-Reference

SA 193 Grade 440c Stud Bolt Material Equivalent

440C / UNS S44004 carries an equivalent designation in every major standard.

USAASTM / AMS (USA)

  • UNS S44004
  • ASTM A276 Type 440C
  • AMS 5630 (Bar)
  • AMS 5618 (Aerospace Bar)

GermanyDIN / EN (Germany)

  • Werkstoff 1.4125
  • X105CrMo17
  • EN 10088-3

JapanJIS (Japan)

  • SUS440C
  • JIS G4303

ChinaGB (China)

  • 9Cr18Mo
  • 95Cr18 (GB/T 1220)

FranceAFNOR (France)

  • Z100CD17
07 · Composition

440C Stainless Steel Hex Nuts Chemical Composition

ASTM A276 Type 440C's high-carbon composition unlocks exceptional hardness after heat treatment.

Chemical Composition - UNS S44004 (% by weight)
C0.95–1.20Carbon
Cr16.00–18.00Chromium
Mo0.75 maxMolybdenum
Mn1.00 maxManganese
Si1.00 maxSilicon
P0.040 maxPhosphorus
S0.030 maxSulfur
FeBalanceIron
08 · Strength Data

ASTM A193 Grade 440C Flat Washer Mechanical Properties

440C ships annealed for machining or hardened for service; typical property bands are below.

Annealed Condition (Typical)
Tensile Strength760 MPa / 110 ksi
Yield Strength (0.2%)450 MPa / 65 ksi
Elongation14% typical
Hardness269 HB max
Hardened & Tempered Condition (Typical)
Tensile Strength1970 MPa / 285 ksi
Yield Strength (0.2%)1895 MPa / 275 ksi
Elongation2% typical
Hardness58–60 HRC typical
09 · Physical Data

Type 440C Fasteners Physical Properties

Reference physical values for UNS S44004 bar stock, useful for thermal, electrical and design-load calculations.

Physical Properties - UNS S44004 (Annealed Condition)
ρ7.80 g/cm³Density
E200 GPaElastic Modulus
α10.2 µm/m·°CMean Coeff. of Thermal Expansion
k24.2 W/m·KThermal Conductivity
Cp460 J/kg·KSpecific Heat
Ω0.60 µΩ·mElectrical Resistivity
MP1450-1510°CMelting Range
μFerromagneticMagnetic Behaviour

AISI 440C Fastener Exporter In India Shipping To Durban & Rotterdam

Container-ready 440C fastener packing, hardness-tested and export-documented, for South Africa and European buyers alike.

Request Export Quote
10 · Heat Treatment

SS 440C Fasteners Heat Treatment & Hardness (HRC) Chart

Global buyers frequently request these 440C Rockwell hardness ranges by condition before finalizing orders.

Annealed (Soft, Machinable)≤269 HB • ∼27 HRC eq.
Hardened & Tempered (Service)58–60 HRC
Cryogenically Treated (Peak)Up to 60–62 HRC
11 · Reference Chart

440C Hardness Conversion Chart (HRC – HV – HB)

Rockwell C (HRC)Vickers (HV)Brinell (HB, 3000 kgf)Approx. Tensile (MPa)
60697—2400
58653615*2250
566135782110
545775431990
505134811770
464584321580
403923711350
363543361220
303052861050
282912711000
26277258955
12 · Comparison

440C vs 316 Stainless Steel Fasteners

440C (UNS S44004)

  • Structure: Martensitic, magnetic
  • Hardness: 58–60 HRC after heat treat
  • Corrosion Resistance: Moderate, mild environments
  • Best For: Wear surfaces, bearings, blades

316 (UNS S31600)

  • Structure: Austenitic, non-magnetic
  • Hardness: ∼95 HRB annealed, not hardenable
  • Corrosion Resistance: High, chloride & marine duty
  • Best For: Marine, chemical, general corrosion duty
13 · Field Behaviour

AISI 440C U Bolt Magnetic Response & Corrosion Rating

As a Stainless Steel 440C Fasteners exporter, we address buyer queries regarding expected corrosion resistance.

Ferromagnetic (Martensitic)
Passivated Per ASTM A967
Moderate Resistance, Fresh Water & Mild Acids
Not Rated For Chloride/Marine Immersion

ASTM A276 440C Fastener Supplier In Bengaluru, ISO 9001 Certified

Southern India buyers get the same mill-direct pricing and MTC pack as our export customers.

Get Supplier Quote
Turnaround

440C Fastener Delivery Estimate By Shipping Mode

Ex-Stock Dispatch

Ready 440C fasteners leave our Mumbai unit in 24–48 hours once payment clears

Sea Freight

Most economical route to your port, typically 10–25 days transit

Air Freight

Urgent breakdown or shutdown orders fly out in 3–6 days

Country-Specific ETA

Tell us your destination country and we confirm an exact delivery window

14 · Quality

INOX 440C Rivet Testing & Certification

Each of these checks is available on request and recorded on your mill test certificate.

PMI Testing
Rockwell Hardness
Chemical Analysis
Tensile & Proof Load
MTC 3.1
Salt Spray Test
Third-Party Inspection
Heat Number Traceability
Global Reach

440C Fasteners - Countries We Export To

Ex-stock supply lines serving buyers across the Gulf, Africa, Europe, the Americas and Southeast Asia.

UAE UAE Turkey Turkey Canada Canada UK United Kingdom Saudi Arabia Saudi Arabia Singapore Singapore USA United States Mexico Mexico Thailand Thailand Italy Italy Netherlands Netherlands Germany Germany Philippines Philippines Malaysia Malaysia Uganda Uganda Indonesia Indonesia South Africa South Africa Vietnam Vietnam Venezuela Venezuela
15 ·FAQs

Stainless Steel 440C Fasteners FAQs

Quick answers to the questions buyers ask us most before placing an order.

What is SS 440C Fasteners known for?

SS 440C Fasteners offer the highest hardness and wear resistance in stainless grades.

Are AISI 440C U Bolts magnetic?

Yes, AISI 440C U Bolts are magnetic since 440C is a martensitic stainless steel.

What hardness do 440C Stainless Steel Hex Nuts reach?

440C Stainless Steel Hex Nuts reach 58-60 HRC after hardening and tempering.

How does ASTM A193 Grade 440C Flat Washer differ from SA193 Grade 440C Stud Bolt?

Both follow ASTM/SA193 440C specs; washers resist wear, stud bolts need tensile strength.

Stainless Steel 440C Fasteners - Built On Trust With Mortec
Highest hardness of any stainless fastener grade we stock
Annealed & hardened stock held ex-Mumbai, M3 to M42
Every 440C batch hardness-checked with MTC EN 10204 3.1 & 3.2
Custom lengths and passivation packed for any port

Materials



Products

Certifications & Credentials
Certified to PED 2014/68/EU for the manufacture of forged steel products
Stock, distribute and trade Steel Flanges, Nuts and Bolts, and precision-machined parts in Nickel Alloys, High Temperature Alloys and Super Alloys
Since 2012, exporting Oil and Gas piping items built to NACE MR0175 / ISO 15156 across the Egypt, Tunisia, Netherlands, Azerbaijan, South Africa, Algeria, Saudi Arabia and Morocco
Hold the largest import and stock inventory of bolting accessories, in both ferrous and non-ferrous metals, in India

Authorized Supplier For The Following Companies - Material At Reseller Price For Traders

Associated Companies - ADNOC, SABIC, Saudi Aramco, GASCO, ORPIC, KNPC, QATARGAS

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