Duplex 2304 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, ADNOC • GST, IEC & MSME

Clientele

100+ clients • India & export markets

Export Reach

19+ countries • GCC, Africa & APAC

Testing Offered

Mechanical, chemical & PMI • MTC EN 10204 3.1 & 3.2

Shipment Documents

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

Table of Content

Duplex 2304 Fasteners Specification Duplex stainless steel 2304 fasteners Size Chart Duplex 2304 Bolt, Nut, Washer & Screw Dimension Charts Duplex 2304 Fasteners Types Lean Duplex 2304 Bolts Applications Duplex Steel 2304 Nut Governing Manufacturing Standards UNS S32304 Machine Screw Chemical Composition Alloy 2304 Anchor Screw Mechanical Properties SAF 2304 Stud Bolt Physical Properties Duplex Steel 2304 Anchor Screw Material Equivalent Grades WNR 1.4362 Eye Stud Bolt Magnetic Properties & PREN Rating Duplex 2304 vs Duplex 2205 vs SS 316 Fasteners DIN 1.4362 Socket Head Cap Screw Solution Annealing & Heat Treatment ASME SA479 Hex Bolt Passivation, Finish & Export Packing UNS S32304 Fastener Delivery Timeline By Shipping Mode Duplex 2304 Screw Testing & Certification Duplex 2304 Fasteners FAQs

Precision Duplex 2304 Nut and Bolts Manufacturer in India, Available Stocks from M6 to M100 Metric Sizes

We manufacture Duplex stainless steel 2304 fasteners at our own Mumbai forge. Each UNS S32304 Duplex Steel Machine Screw is cut on in-house CNC lathes. Every Duplex Steel 2304 Anchor Screw suits base-plate and structural fixing. ASME SA479 Duplex S32304 Hex Bolts carry 400 MPa minimum yield strength. Duplex 2304 Nuts are proof-load matched to that bolting. WNR. 1.4362 Eye Stud Bolts are forged for shackle and hook fitment. ASME SA479 Duplex S32304 Washers spread load and resist joint vibration.

2304 Duplex Stainless Steel Bolts stay ex-stock from M6 to M100. Alloy 2304 Hex Nuts ship in four finishes on request. SAF 2304 Heavy Hex Bolts move to South Africa, the UAE and Canada. UNS S32304 Heavy Hex Nuts leave Mumbai with EN 10204 3.1 certification. Any DIN 1.4362 Socket Head Cap Screw is gauged before packing. ASME SA182 F60 Threaded Rod is cut to your drawing length. Duplex S32304 Screws reach 19+ countries in export wooden crating.

01 · Specification

Duplex 2304 Fasteners Specification

Premium Quality UNS S32304 Heavy Hex Nuts Manufacturer in India.

Duplex 2304 Head & Drive Styles

Heavy hex, hex, socket, eye, ring
Custom head to drawing on request

UNS S32304 Fine & Special Threads

ISO 965 metric fine pitch
UNC, UNF, BSW on request

WNR 1.4362 Surface Finish & Passivation

Passivated per ASTM A967
Bright pickled or as-forged finish

Alloy 2304 Fastener Testing Methods

PMI, tensile, hardness
Third-party inspection on request

Grade 2304 Supporting Hardware

Matching Duplex 2304 washers & spring washers
Locknuts and split pins to order

2304 Duplex Fastener Manufacturing Origin

Indian & European mills
Origin certificate on request

Duplex 2304 Fasteners Manufacturer In Mumbai Since 2012

Share drive, size and heavy hex requirement - our forge and CNC shop return ex-stock and mill-order timelines the same day.

Request Quote Now

02 · Size Range

Duplex stainless steel 2304 fasteners Size Chart

Popular Sizes M8 M10 M12 M16 M20 M24

Metric Coarse Thread Pitch - ISO 261 (mm)

Nominal Size	Coarse Pitch (mm)	Nominal Size	Coarse Pitch (mm)
M6	1.00	M36	4.00
M8	1.25	M42	4.50
M10	1.50	M48	5.00
M12	1.75	M56	5.50
M16	2.00	M64	6.00
M20	2.50	M72	6.00
M24	3.00	M80	6.00
M30	3.50	M90	6.00

What Changes The Size On Order

Thread SeriesCoarse is default; fine pitch on request

LengthCut to drawing, any length within M100 range

Head/DriveChanges across-flats and head height, not thread

FormHeavy hex vs standard hex changes bearing width

Need An Exact Dimension Drawing?

Share your size, drive type and quantity for an instant ex-Mumbai price on Duplex 2304 fasteners, along with a dimensioned drawing for fitment checks.

Request Size Chart

03 · Dimension Charts

Duplex 2304 Bolt, Nut, Washer & Screw Dimension Charts

Working dimensions for UNS S32304 hex bolts, heavy hex nuts, washers, socket head cap screws and threaded rod, tabulated to ISO and DIN metric standards.

UNS S32304 Hex Bolt Dimensions (D, H, F, C) - M10 To M100

D = shank / nominal thread diameter, H = head height, F = width across flats, C = width across corners. Values follow ISO 4014 / DIN 931 product grade B for hexagon head bolts in Duplex 2304.

Duplex 2304 Hex Bolt Head Dimensions - ISO 4014 / DIN 931 (mm)

Size	D Max	D Min	H Max	H Min	F Max	F Min	C Max	C Min
M10	10.00	9.78	6.58	6.22	16.00	15.73	18.48	17.77
M12	12.00	11.73	7.68	7.32	18.00	17.73	20.78	20.03
M16	16.00	15.73	10.18	9.82	24.00	23.67	27.71	26.75
M20	20.00	19.67	12.72	12.29	30.00	29.67	34.64	32.95
M24	24.00	23.67	15.22	14.79	36.00	35.38	41.57	39.55
M30	30.00	29.67	19.12	18.28	46.00	45.38	53.12	50.85
M36	36.00	35.61	22.92	22.08	55.00	54.26	63.51	60.79
M42	42.00	41.61	26.42	25.58	65.00	64.26	75.06	71.30
M48	48.00	47.61	30.42	29.58	75.00	74.26	86.60	82.60
M56	56.00	55.54	35.50	34.50	85.00	84.13	98.15	93.56
M64	64.00	63.54	40.50	39.50	95.00	94.13	109.70	104.86
M72	72.00	71.54	44.50	43.50	105.00	104.13	121.24	115.71
M80	80.00	79.54	48.50	47.50	115.00	114.13	132.79	126.72
M90	90.00	89.46	54.50	53.50	130.00	129.13	150.11	143.20
M100	100.00	99.46	60.50	59.50	145.00	144.13	167.43	159.70

Duplex 2304 Heavy Hex Nut Dimensions - Across Flats, Across Corners & Thickness

UNS S32304 Hex Nut Dimensions - ISO 4032 / DIN 934 (mm)

Size	Across Flats Max	Across Flats Min	Across Corners Min	Thickness Max	Thickness Min
M10	16.00	15.73	17.77	8.40	8.04
M12	18.00	17.73	20.03	10.80	10.37
M16	24.00	23.67	26.75	14.80	14.10
M20	30.00	29.16	32.95	18.00	16.90
M24	36.00	35.00	39.55	21.50	20.20
M30	46.00	45.00	50.85	25.60	24.30
M36	55.00	53.80	60.79	31.00	29.40
M42	65.00	63.10	71.30	34.00	32.40
M48	75.00	73.10	82.60	38.00	36.40
M56	85.00	82.80	93.56	45.00	43.40
M64	95.00	92.80	104.86	51.00	49.10
M72	105.00	102.80	115.71	58.00	56.10
M80	115.00	112.60	126.72	64.00	62.10
M90	130.00	127.60	143.20	72.00	70.10
M100	145.00	142.60	159.70	80.00	78.10

ASME SA479 Duplex S32304 Washer Dimensions - ID, OD & Thickness

Duplex 2304 Plain Washer Dimensions - ISO 7089 / DIN 125A (mm)

Bolt Size	Inside Dia (ID)	Outside Dia (OD)	Thickness	Thickness Tolerance
M10	10.50	20.00	2.00	±0.20
M12	13.00	24.00	2.50	±0.20
M16	17.00	30.00	3.00	±0.25
M20	21.00	37.00	3.00	±0.25
M24	25.00	44.00	4.00	±0.30
M30	31.00	56.00	4.00	±0.30
M36	37.00	66.00	5.00	±0.40
M42	45.00	78.00	8.00	±0.50
M48	52.00	92.00	8.00	±0.50
M56	62.00	105.00	10.00	±0.60
M64	70.00	115.00	10.00	±0.60
M72*	78.00	125.00	12.00	±0.60
M80*	86.00	140.00	12.00	±0.60
M90*	96.00	160.00	14.00	±0.80
M100*	107.00	175.00	16.00	±0.80

DIN 1.4362 Socket Head Cap Screw Dimensions - DIN 912 / ISO 4762

Duplex 2304 Socket Head Cap Screw Dimensions - DIN 912 (mm)

Size	Head Dia Max	Head Dia Min	Head Height Max	Head Height Min	Hex Key Across Flats
M3	5.50	5.32	3.00	2.86	2.5
M4	7.00	6.78	4.00	3.82	3
M5	8.50	8.28	5.00	4.82	4
M6	10.00	9.78	6.00	5.70	5
M8	13.00	12.73	8.00	7.64	6
M10	16.00	15.73	10.00	9.64	8
M12	18.00	17.73	12.00	11.57	10
M16	24.00	23.67	16.00	15.57	14
M20	30.00	29.67	20.00	19.48	17
M24	36.00	35.61	24.00	23.48	19
M30	45.00	44.61	30.00	29.48	22
M36	54.00	53.54	36.00	35.38	27
M42	63.00	62.54	42.00	41.38	32
M48	72.00	71.54	48.00	47.38	36
M56	84.00	83.46	56.00	55.26	41
M64	96.00	95.46	64.00	63.26	46

Duplex Steel S32304 Stud Bolt & Threaded Rod Pitch Chart

UNS S32304 Stud Bolt & Threaded Rod Thread Data - ISO 261 / ISO 965 (mm)

Size	Coarse Pitch	Fine Pitch Options	Pitch Dia (Coarse)	Tensile Stress Area (mm²)
M10	1.50	1.25 / 1.00	9.026	58.0
M12	1.75	1.50 / 1.25	10.863	84.3
M16	2.00	1.50	14.701	157
M20	2.50	2.00 / 1.50	18.376	245
M24	3.00	2.00	22.051	353
M30	3.50	2.00	27.727	561
M36	4.00	3.00	33.402	817
M42	4.50	3.00	39.077	1121
M48	5.00	3.00	44.752	1473
M56	5.50	4.00	52.428	2030
M64	6.00	4.00	60.103	2676
M72	6.00	4.00	68.103	3460
M80	6.00	4.00	76.103	4344
M90	6.00	4.00	86.103	5591
M100	6.00	4.00	96.103	6995

04 · Product Range

Duplex 2304 Fasteners Types

A trusted Duplex 2304 fasteners Manufacturer in India supplying ready-to-ship components.

Duplex 2304 Heavy Hex Nut

ASME SA479 S32304 • M6–M100

Matched proof load to Duplex 2304 bolting
Best for structural and pressure joints

UNS S32304 Hex Bolt

ASTM A276 • M6–M100

Solution-annealed, non-hardenable bar
High clamp load without added alloy cost

Duplex Steel 2304 Machine Screw

ISO 965 • M3–M20

Pan, cheese & countersunk heads
Panel, bracket & enclosure fixing

WNR 1.4362 Eye Stud Bolt

Custom Length • Lifting & Anchor Points

Forged eye for shackle or hook fitment
Cut and threaded to drawing

ASME SA479 Duplex S32304 Washer

DIN 125 / DIN 127 • Custom OD

Load spread & vibration resistance
Matched thickness to bolt size

DIN 1.4362 Socket Head Cap Screw

DIN 912 • M3–M64

Compact head for tight bolt patterns
High clamp load in a small footprint

Duplex Steel S32304 Threaded Rod

ASTM A276 • Custom Length

Full or partial thread, cut to length
Used with double-ended tap fittings

Duplex Steel 2304 Anchor Screw

Concrete & Structural Fixing

Corrosion-resistant base-plate anchoring
Wedge, sleeve & chemical-stud options

Suppliers of UNS S32304 Eye Stud Bolts and Washers for High Stress Applications at Best Price

05 · Industries

Lean Duplex 2304 Bolts Applications

Industries across India rely on us for UNS S32304 Duplex Steel Machine Screw and prompt dispatch.

Pulp & Paper Digesters

Pressure Vessels & Storage Tanks

Chemical & Petrochemical Processing

Desalination Plants

Water & Wastewater Treatment

Mining & Mineral Processing

Food & Beverage Equipment

Structural & General Engineering

06 · Codes We Follow

Duplex Steel 2304 Nut Governing Manufacturing Standards

We inspect every Duplex 2304 fastener against governing specifications prior to dispatch.

ASTM A240

ASTM A276

ASME SA479

ASTM A182 Grade F68

DIN EN 10088-3

EN 10204 (MTC)

Client-Specific

07 · Composition

UNS S32304 Machine Screw Chemical Composition

ASTM A276 Grade UNS S32304's molybdenum-free composition yields high yield strength with 316L-level general corrosion resistance.

Chemical Composition - UNS S32304 (% by weight)

Cr21.50–24.50Chromium

Ni3.00–5.50Nickel

Mo0.05–0.60Molybdenum

N0.05–0.20Nitrogen

Cu0.05–0.60Copper

C0.030 maxCarbon

Mn2.50 maxManganese

Si1.00 maxSilicon

P0.040 maxPhosphorus

S0.030 maxSulfur

FeBalanceIron

08 · Strength Data

Alloy 2304 Anchor Screw Mechanical Properties

Values reflect ASTM A276 Condition A, solution-annealed bar; Duplex 2304 is not hardenable by heat treatment.

Tensile Strength (Condition A)600 MPa min

0.2% Yield Strength (Condition A)400 MPa min

Elongation (Condition A)25% min in 50mm

Hardness (Condition A)290 HB max

09 · Physical Data

SAF 2304 Stud Bolt Physical Properties

Room-temperature physical constants for UNS S32304 / WNR 1.4362 used in weight, thermal growth and bolt-load calculations.

Physical Properties - Duplex 2304 (UNS S32304 / 1.4362)

Property	Metric Value	Imperial Value
Density	7.75 g/cm³	0.280 lb/in³
Melting Range	1400–1450 °C	2550–2640 °F
Modulus of Elasticity (20 °C)	200 GPa	29 × 10⁶ psi
Modulus of Elasticity (200 °C)	180 GPa	26 × 10⁶ psi
Poisson's Ratio	0.30	0.30
Coefficient of Thermal Expansion (20–100 °C)	13.0 × 10^-6 /K	7.2 × 10^-6 /°F
Thermal Conductivity (20 °C)	17 W/m·K	118 BTU·in/hr·ft²·°F
Specific Heat Capacity (20 °C)	480 J/kg·K	0.115 BTU/lb·°F
Electrical Resistivity (20 °C)	0.80 µΩ·m	800 nΩ·m
Magnetic Permeability	Ferromagnetic, µr > 40	Weakly magnetic
Ferrite Content (Solution Annealed)	45–60 %	45–60 %
PREN (Cr + 3.3Mo + 16N)	24 min	24 min
Recommended Service Range	-50 to +300 °C	-58 to +570 °F

10 · Cross-Reference

Duplex Steel 2304 Anchor Screw Material Equivalent Grades

Grade 2304/UNS S32304 maintains identical lean-duplex chemistry across equivalent designations in major standards.

ASTM / ASME (USA)

UNS S32304
ASTM A240 (Plate)
ASTM A276 (Bar)
ASME SA479 (Bolting Bar)
ASTM A182 Grade F68 (Forgings)

DIN / EN (Germany)

Werkstoff 1.4362
EN X2CrNiN23-4
DIN EN 10088-3

AFNOR (France)

Z3 CN 23.04 Az

SS (Sweden)

SS 2327

BS (United Kingdom)

Follows EN 10088-3 (1.4362)
No separate legacy BS number in current use

Cross-Checking A DIN, AFNOR Or SS Callout?

Send your drawing reference and we confirm the matching Duplex 2304 designation before we quote.

Confirm My Standard

11 · Buyer Question

WNR 1.4362 Eye Stud Bolt Magnetic Properties & PREN Rating

Purchase Alloy 2304 Threaded Rod and Stud Bolts for B2B Industrial use at Competitive Price

Magnetic: Weakly

PREN: 24 Min

Vs Grade 316L: Comparable

Service Range: -50 To +300°C

SCC Resistance: Outperforms 304/316

Best Finish: Passivated, Smooth

12 · Comparison

Duplex 2304 vs Duplex 2205 vs SS 316 Fasteners

SS 316 (S31600)

Family: Austenitic, Cr-Ni-Mo
Yield Strength: Roughly half of Duplex 2304
Magnetic: No (typically)
Best For: Wetted parts, general chemical duty
Relative Cost: Higher (Ni/Mo content)

Duplex 2304 (S32304)

Family: Lean duplex, molybdenum-free
Yield Strength: 400 MPa min
Magnetic: Weakly (ferrite phase)
Best For: Pressure vessels, pulp & paper, weight savings
Relative Cost: Medium-low, entry duplex grade

Duplex 2205 (S32205)

Family: Standard duplex, Mo-bearing
Yield Strength: 450 MPa min
Magnetic: Weakly (ferrite phase)
Best For: Seawater, high-chloride, offshore duty
Relative Cost: Higher

UNS S32304 Duplex Fastener Exporter In India To Port Klang, Malaysia

Container-ready 2304 bolt, nut and stud pricing for Port Klang and Jakarta-bound shipments within days.

Request Export Quote

13 · Fabrication

DIN 1.4362 Socket Head Cap Screw Solution Annealing & Heat Treatment

Duplex 2304 is not hardenable by heat treatment - process control instead protects its ferrite-austenite balance.

Hot/Cold Forming

Hot form at 900–1150°C; cold form as for 304L/316L with higher force.

Solution Annealing

Heat to 950–1050°C, hold, then rapid water quench.

Phase Balance

Quenching restores the roughly 50/50 ferrite-austenite structure.

Finish & Inspect

Pickle, passivate, then hardness and dimensional check.

14 · Finish & Packing

ASME SA479 Hex Bolt Passivation, Finish & Export Packing

ASTM A967 Passivation

Bright Pickled Finish

Mill / As-Forged Finish

VCI Anti-Rust Wrap

Bin & Carton Packing

Export Wooden Crating

ASME SA479 Duplex S32304 Supplier In Chennai - ADNOC Approved

Chennai and Tamil Nadu process buyers get the same ADNOC-approved 2304 stock as our export accounts.

Get Supplier Quote

Global Reach

Where Our Duplex 2304 Fasteners Ship

Ex-stock and mill-order dispatch to buyers across the Gulf, Africa, the Americas and Asia-Pacific, alongside strong domestic demand from Mumbai, Ahmedabad, Bengaluru, Chennai and Pune.

Key Export Markets

UAE

Saudi Arabia

Turkey

Canada

United Kingdom

Singapore

United States

Mexico

Thailand

Italy

Netherlands

Germany

Philippines

Malaysia

Uganda

Indonesia

South Africa

Vietnam

Venezuela

15 · Turnaround

UNS S32304 Fastener Delivery Timeline By Shipping Mode

Confirmed Duplex 2304 orders ship from Mumbai within a week; chosen freight determines delivery.

Ex-Stock Dispatch

Ready-stock Duplex 2304 orders clear our warehouse in 2 to 5 working days

Sea Freight

Our most budget-friendly option, generally taking 1 to 4 weeks by destination port

Air Freight

3 to 7 days, ideal for urgent shutdown or spare-part replenishment orders

Country-Specific ETA

Tell us your delivery city or port and we'll confirm a fixed ETA

16 · Quality

Duplex 2304 Screw Testing & Certification

Your mill test certificate will detail all requested quality checks prior to dispatch.

PMI Testing

Tensile & Proof Load Test

Hardness Test

Dimensional Check

MTC 3.1

Chemical Analysis

Third-Party Inspection

Heat Number Traceability

17 · FAQs

Duplex 2304 Fasteners FAQs

Common buyer questions resolved by the actual Duplex 2304 fastener manufacturer.

What is equivalent to UNS S32304 Duplex Steel?

UNS S32304 equals WNR 1.4362, AFNOR Z3CN23.04Az, and SS 2327 across international standards.

Can Duplex 2304 Nuts handle high temperatures?

Duplex 2304 Nuts suit -50°C to +300°C; higher temperatures risk brittle phase precipitation.

Is SAF 2304 Heavy Hex Bolts magnetic?

Yes, SAF 2304 Heavy Hex Bolts show weak magnetism due to their ferrite-austenite duplex structure.

How do ASME SA479 Duplex S32304 Washers differ from Duplex 2205?

2205 adds molybdenum for higher strength; S32304 washers suit moderate corrosion at lower cost.

What sizes of Duplex Steel S32304 Threaded Rod are available?

We stock M6 to M100 ex-stock; other sizes available to mill order on request.

Duplex 2304 Fasteners Snapshot