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Inconel 625 Round Bars Supplier & Exporters

ASTM B446 UNS N06625 Rod and Nickel Alloy 625 Hex Bar supplier in India, Alloy 625 Forged Bar Stock, Inconel Alloy 625 Cold Finished Bars Suppliers in India.

Inconel 625 Round Bars
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Kalpataru Piping Solutions is a reliable supplier/ exporter of high quality nickel alloy steel products in the world and has a complete line of Inconel Alloy 625 Rods and Inconel 625 Round Bars which may be utilized in industries. Developed and composed of a highly-quality nickel-chromium-molybdenum alloy to deliver high-performance mechanical strength, corrosion resistance and stability in high temperatures. Our products are produced to international specifications, such as ASTM B446, ASME SB 446, AMS 5666, ASTM B564 and the products of the resultant quality and durability are also homogenous.

Inconel 625 Round Bars can be offered in standard and custom sizes in a variety of finishes (black, bright and polished) that can be used in many industries. We are a reputable Nickel Alloy 625 Round Bars stockholder and we can offer a big size between the small scale and heavy industry applications. Another product that we manufacture and market is Alloy 625 Rod 2.4856 that is fully compliant with the engineering and safety standard requirements in the world. Intensive testing on our ASTM B446 UNS N06625 Bar Stock all is done at government-accepted and third party labs. We have Inconel products under which we have Inconel 625 Round Bars that are applied in stressful industries like oil and gas, marine engineering and chemical process, and we have ready inventories in this category that can be easily exported to every corner of the world.

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Available Types of Inconel Alloy 625 Bars & Rods

Various Inconel 625 Round Bars, such as hot rolled, cold drawn, polished, annealed, bright, forged, Inconel 625 Tig Rod, Inconel 625 filler rod, Inconel 625 welding rod, threaded bars, available in a large range. Use the following list to identify the correct Alloy 625 bar to use in your industrial task.

alloy 625 flat bar

Alloy 625 Flat Bar

uns n06625 rod

UNS N06625 Rod

Alloy 625 hex bar

Alloy 625 Hex Bar

alloy 625 square bar

Alloy 625 Square Bar

alloy 625 forged bar

Alloy 625 Forged Bar

alloy 625 bright bar

Alloy 625 Bright Bar

Inconel 625 Round Bar Standards & Certifications (ASTM B446 / AMS 5666 / ASME SB446)

Kalpataru Piping Solutions has supplied Inconel 625 Round Bars to oil & gas, aerospace and chemical processing projects across 50+ countries since 1995. All Inconel 625 Round Bars are tested at NABL-approved laboratories. EN 10204 3.1 Mill Test Certificates are supplied as standard with every order.

Standard Specification Body Application
ASTM B446 ASTM International Rod & Bar — Chemical & Mechanical
ASME SB446 ASME Pressure vessel & boiler applications
AMS 5666 SAE Aerospace Aerospace Material Specification — Bar, Rod, Wire
AMS 5837 SAE Aerospace Welding wire — Aerospace
DIN 17752 / 2.4856 DIN / European German & European markets
ISO 9723 ISO Nickel alloy rod & bar international
BS 3076 NA21 British Standards UK / Commonwealth projects
EN 10095 European Norm Heat-resistant nickel alloys
VdTUV 499 German TUV Pressure equipment — Europe
ASME Code Case 1935 ASME Boiler & pressure vessel code approval
IBR 1950 Chief Inspector of Boilers, India Indian boiler & pressure vessel compliance

Procurement Note

AMS 5666 is mandatory for aerospace and defence procurement. Request AMS 5666-compliant bars with EN 10204 3.1 Mill Test Certificates. Our team will confirm which standards apply to your project before order confirmation.

Scope of Manufacturing and Supply

We manufacture our bars with great precision and tight dimensional control. We provide peeling, centerless grinding and polishing facilities so that the surface quality suits your specific requirement for machining or immediate usage.

Form Applicable Standards
Solid Rod ASME SB446, ASTM B446, VdTUV 499, ISO 9723, EN 10095, ASME Code Case 1935, DIN 17752, BS 3076 NA21
Solid Bar ASME Code Case 1935, ASME SB446, ISO 9723, AMS 5666, ASTM B446, BS 3076 NA21, VdTUV 499, DIN 17752, EN 10095, IBR 1950
Forging Stock DIN 17754, ASME SB564, ASME Code Case 1935, AMS 5666, ASTM B564, ISO 9725

Inconel 625 Bars Specifications

Parameter Details
International Specifications VdTüV 499, ISO 9723, ISO 9724, BS3076NA21, EN 10095, ISO 9725, DIN 17752, DIN 17754, DIN 17753, WERKSTOFF Nr 2.4856
Grade Inconel 625 – Nickel Alloy 625, ASTM B446, UNS N06625, AMS 5666, AMS 5837
Specification of Bar ASTM B446, AMS 5666, ASME SB446, VdTUV 499, ISO 9723, EN 10095, BS 3076 NA21, ASME Code Case 1935, DIN 17752
Specification of Rod ASME SB446, ASTM B446, VdTUV 499, ISO 9723, EN 10095, BS 3076 NA21, ASME Code Case 1935, DIN 17752
Hex Bar 2–100mm A/F
Flat Bar Thickness: 2–100mm | Width: 10 to 500mm
Channel Bar Section: 5.0 to 6.0 thick, 80×40mm to 150×75mm
Round Bar Diameter: 3–~800mm
Square Bar 4 to 100mm
Section 3 to 12mm thick
Rectangles 33×30 to 295×1066
Billet 1/2″ to 495 Dia.
Angle Bar 3×20×20 ~ 12×100×100mm
Hollow Bar 32mm OD × 16mm ID to 250mm OD × 200mm ID
Form Flat Bar, Hollow, Round, Square, Triangle, Rectangle, Half Round Bar, Rod, T-Bar, Precision Ground Bar, Hex (A/F), Blocks, Channel Bar, Threaded, Round Rod, Billet, Profiles, I/H Bar, Ingot, Rings, Forging etc.
Technique Hot Rolled, Cold Drawn, Rod, Forged Round Bar, Cold Rolled
Condition Annealed, Hardened & Tempered
Surface Bright, Cold Drawn, Hot Rolled Pickled, Sand Blasting Finished, Polished, Hairline

Chemical Composition of Inconel 625

Grade Fe Ni C Cr Si Mn Mo Al Co Ti P Nb + Ta S
Inconel 625 5.0 max 58.0 min 0.10 max 20.0–23.0 0.50 max 0.50 max 8.0–10.0 0.40 max 1.0 max 0.40 max 0.015 max 3.15–4.15 0.015 max

Equivalent Material Grade Chart for Inconel 625

Standard Designation
UNS N06625
WNR 2.4856
GOST ХН75МБТЮ
BS NA 21
EN NiCr22Mo9Nb
JIS NCF 625
AFNOR NC22DNB4M

Mechanical Properties of Inconel 625

Grade Tensile Strength Yield Strength (0.2% Offset) Density Melting Point Elongation
Inconel 625 Psi – 135,000 / MPa – 930 Psi – 75,000 / MPa – 517 8.4 g/cm³ 1350°C (2460°F) 42.5%

Physical Properties of Inconel 625 Bars

Thermal Conductivity

°C °F Thermal Exp. ×10⁻⁶ /°C Thermal Exp. ×10⁻⁶ /°F Conductivity W/m·K Conductivity Btu/(hr/ft²/in/°F)
-157 -250 — — 7.3 4.2
-73 -100 — — 8.3 4.8
21 70 — — 9.9 5.7
93 200 12.8 7.1 10.7 6.3
204 400 13.1 7.3 12.6 7.3
316 600 13.3 7.4 14.2 8.2
427 800 13.7 7.6 15.7 9.1
538 1000 14.0 7.8 17.5 10.1
649 1200 14.8 8.2 19.0 11.0
760 1400 15.3 8.5 20.8 12.0
871 1600 15.8 8.8 22.8 13.2
982 1800 — — 25.3 14.6

 Electrical Resistivity

Temperature °C Temperature °F Resistivity (microhm-cm)
21 70 128.9
93 200 131.9
204 400 133.9
316 600 134.9
427 800 135.9
538 1000 137.9
649 1200 137.9
760 1400 136.9
871 1600 135.9
982 1800 134.9
1093 2000 133.9

Inconel 625 Round Bars Supply Condition & Heat Treatment

The most common form of Inconel 625 bars is the Annealed form (Grade 1) which is typically heat-treated at temperatures equal to or less than 871degC to 1093degC. This gives optimum tensile property and corrosion resistance to be used generally. Grade 2 Solution Annealed material subjected to temperatures of 1093degC or higher are proposed when a high level of creep and rupture values is required at higher temperatures (over 593degC). We supply material under situations that would suit your process of fabrication. Bar annealed is easier to work with and cold-drawn bars have limitations and worth in smaller tolerances and surface finishing.

Machining Tips for Inconel 625 Round Bar

Inconel 625 Round Bars are described as high-strength and corrosion-resistant, and the nature is related to their hardness to machine. The right approach gets the right results and extends the life of tools.

Tip Benefit
Use carbide or ceramic tools Handles work hardening & heat
Use water-soluble coolants Reduces tool wear
Prefer low speed & high feed Avoids work hardening
Keep cuts continuous Improves tool life & finish

Machining Best Practices

  • Avoid Dwell Time: Keep the cutting tool moving to prevent work hardening at one spot.
  • Rigid Setup: Ensure the workpiece is firmly clamped to reduce vibration and chatter.
  • Sharp Tools: Replace or resharpen tools before they become dull to maintain cutting efficiency.
  • Adequate Cooling: Use high-volume coolant to dissipate heat and flush chips away.
  • Progressive Cuts: Take multiple light cuts rather than one heavy cut when possible.
  • Avoid Rubbing: Maintain positive cutting action; rubbing creates excessive heat and hardening.

Welding Methods for Inconel 625

Inconel 625 Round Bars are widely used in industries requiring high corrosion resistance and strength. Proper welding techniques ensure structural integrity and long-term performance. 

Welding Method Description
TIG Complete control over the input of heat and weld.
MIG Faster, suitable for thicker materials.
SMAW Versatile with a consumable electrode.
Plasma Arc Welding Similar to TIG, it uses a constricted arc.

Inconel 625 Round Bars & Rods Weight Chart

Size kg/m kg/ft Size kg/m kg/ft Size kg/m kg/ft
3mm 0.0055 0.0017 20mm 2.047 0.0753 3″ 35.08 10.09
1/8″ 0.0062 0.0019 22mm 2.098 0.0908 3-1/4″ 41.10 12.08
5/32″ 0.0095 0.0029 7/8″ 3.004 0.0926 3-1/2″ 48.08 14.09
4mm 0.0098 0.0030 24mm 3.054 1.008 3-3/4″ 55.08 17.00
3/16″ 0.0141 0.0043 25mm 3.087 1.018 4″ 63.03 19.03
5mm 0.0154 0.0047 1″ 3.097 1.021 4-1/4″ 72.02 21.09
6mm 0.0223 0.0068 26mm 4.017 1.027 4-1/2″ 80.03 24.04
7mm 0.0298 0.0091 27mm 4.049 1.037 4-3/4″ 90.02 27.04
8mm 0.0398 0.0120 30mm 5.055 1.069 5″ 99.09 30.05
9mm 0.0498 0.0152 32mm 6.031 1.089 5-1/2″ 121.00 36.07
10mm 0.0620 0.0189 35mm 7.055 2.039 6″ 143.09 43.09
12mm 0.0889 0.0271 38mm 8.090 2.079 7″ 196.00 59.04
14mm 1.021 0.0368 40mm 9.087 3.001 8″ 254.06 77.06
16mm 1.058 0.0481 45mm 12.06 3.081 10″ 397.01 121.00
18mm 2.000 0.0610 50mm 15.04 4.070 — — —

Inconel 625 Round Bar Size Chart — Diameter, Length & ISO Tolerance Class (h8 to k12) 

Standard Size Range

Bar Form Diameter / Size Range Standard Length Tolerance Class
Cold Drawn Round Bar 3 mm – 100 mm 2–6 m (random) h9 / h10
Hot Rolled Round Bar 20 mm – 200 mm 2–6 m (random) h11 / k12
Peeled / Turned Round Bar 16 mm – 350 mm 2–6 m / cut-to-length h10 / h11
Forged Round Bar 80 mm – 800 mm+ Cut-to-length on request k10 / k12
Centreless Ground Bar 6 mm – 150 mm 2–6 m / fixed lengths h8 / h9
Bright Drawn Bar 3 mm – 80 mm 2–4 m h9
Hollow Bar OD: 32–250 mm 500 mm – 6000 mm h10 / h11

 

ISO Tolerance Class Reference (ISO 286-2)

Tolerance Class Typical Deviation (50 mm dia.) Surface Condition Common Application
h8 0 / −0.039 mm Centreless Ground Precision shafts, pumps
h9 0 / −0.062 mm Bright Drawn / Ground General precision use
h10 0 / −0.100 mm Peeled / Cold Drawn Standard machining stock
h11 0 / −0.160 mm Hot Rolled Peeled Rough machined components
k12 −0.100 / −0.400 mm Hot Rolled Black Forged & rough stock

 Custom tolerances tighter than h8 are available on request for pump shafts, valve spindles and precision components. Specify the required tolerance class in your enquiry. If unsure, our technical team will recommend the appropriate class based on your end application.

Inconel 625 Round Bar Surface Finish Guide — BD, HRAP, CG, BA & Polished Options

Inconel 625 Round Bars are available in seven surface finishes to suit different machining, corrosion and application requirements. Specify the correct finish code in your enquiry — surface finish directly affects dimensional tolerance, delivery cost and lead time.

Finish Code Finish Name Description Best For Tolerance
BD Bright Drawn Cold drawn through a die — smooth, bright metallic surface General machining, tight dimensional control h9
HF / HR Hot Rolled Black Mill finish with oxide scale — as-rolled, no further processing Rough stock; further machining expected k12
HRAP Hot Rolled Annealed & Pickled Hot rolled, then annealed & acid pickled to remove scale Chemical processing, marine — corrosion-critical h11
RT Rough Turned / Peeled Light mechanical removal of surface layer; smooth matte finish Forged stock ready for machining h10 / h11
CG Centreless Ground Precision ground to tight OD — superior surface roughness Ra Pump shafts, valve spindles, close-fit assemblies h8 / h9
POL Polished Fine mechanical polish — low Ra, bright appearance Pharmaceutical, food-grade, visual inspection components h9 / h10
BA Bright Annealed Annealed in controlled atmosphere — retains bright surface post-heat-treatment Aerospace, nuclear — clean surface + annealed properties required h9 / h10

Which Finish Should You Specify?

Not sure which finish to specify? For most machining applications, Bright Drawn (BD) or Rough Turned (RT) is standard. For corrosion-critical service, specify HRAP. For precision shaft applications, request Centreless Ground (CG) with h8 tolerance.

Inconel 625 Hollow Bar — Sizes, Specifications & Cost Advantages Over Solid Bar

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alt=’Inconel 625 Hollow Bar UNS N06625 OD 32-250mm Kalpataru Piping Solutions Mumbai’

Inconel 625 Hollow Bar is a precision-machined tubular bar form manufactured from solid UNS N06625 alloy. It is used as a direct alternative to machining from solid round bar wherever a bore is required — reducing material waste, machining time and cost significantly.

Hollow Bar Size Range

Parameter Min Max Unit
Outside Diameter (OD) 32 250 mm
Inside Diameter (ID) 16 200 mm
Wall Thickness 8 50 mm
Length (Standard) 500 6000 mm
Length (Custom cut) Available on request    

Why Choose Hollow Bar Over Solid Bar?

Benefit Hollow Bar Machined from Solid
Material Waste Minimal High — bore machined away
Machining Time Reduced significantly Long — full bore drilling
Cost Efficiency Lower total cost Higher cost per part
Typical Uses Pump shafts, valve bodies, bushings, sleeves Solid shafts, flanges, studs, general bar stock where no bore is required

Inconel 625 Hollow Bar is available ex-stock for common OD/ID combinations. Send us your OD, ID, wall thickness and required length — we will confirm stock availability and lead time within one business day.

Applications of Inconel 625 Round Bars

  • Seawater Components: Corrosion-resistant springs, seals, bellows, fasteners and oceanographic instruments.
  • Offshore Marine Equipment: Pumps, valves and structural components of harsh offshore environments.
  • Aerospace: Aircraft ducting, engine exhausts, fuel/hydraulic lines, spray bars and bellows.
  • Bellows: Expansion joints and flexible connectors that need a high level of strength and resistance to corrosion.
  • Chemical Processing: Reactors, heat exchangers and high-temperature and acid-exposed pipes.
  • Flare Stacks: Oil and gas plant components of high temperature and resistance to oxidation.
  • Nuclear Applications: Used in radiation and corrosion-resistant components of the reactor, heat exchangers, and piping systems.

Quality Assurance & Testing of Inconel 625 Round Bars

At Kalpataru Piping Solutions, strict quality checks and tests are done on all Inconel 625 Round Bars to guarantee that they match international standards and can perform as expected in high-pressure applications. 

Testing Methods

Testing Method Typical Use
Brinell Larger samples; average hardness.
Rockwell Quick, common for metals (HRC, HRB).
Vickers Versatile, wide range of materials.
Knoop Brittle materials; thin films.
Leeb Portable, large components.

 Documents Provided

  •       Manufacturer Test Certificate (MTC) as per EN 10204 3.1
  •       NABL Approved Lab Test Reports
  •       Certificate of Conformity
  •       Heat Treatment Charts (if applicable)

Inconel 625 Round Bar Price in India 2026 — INR/kg Rates, Payment Terms & Export Details

Indicative Inconel 625 Round Bar prices in India are listed below by bar form and surface finish condition. All prices are LME-linked and reviewed monthly. For a firm price valid for 7–14 business days, submit a quote request with your diameter, quantity, finish requirement and delivery destination. 

Indicative Price — Inconel 625 Round Bars (India)

Bar Form / Condition Size Range Indicative Price (INR/kg) Indicative Price (USD/kg)
Hot Rolled Black Bar 20 mm – 100 mm OD ₹ 3,200 – ₹ 4,000 USD 38 – 48
Bright Drawn / Peeled Bar 12 mm – 80 mm OD ₹ 4,200 – ₹ 5,200 USD 50 – 62
Centreless Ground Bar 6 mm – 100 mm OD ₹ 5,000 – ₹ 6,500 USD 60 – 78
Forged Bar 80 mm – 350 mm OD ₹ 4,500 – ₹ 6,000 USD 54 – 72
Hollow Bar OD 32–250 mm ₹ 5,500 – ₹ 7,500 USD 66 – 90

Prices are indicative only and subject to change based on LME Nickel rates, order quantity, finish and testing requirements. Submit an RFQ for a firm price valid for 7–14 business days. 

Get a Quote for Inconel 625 Round Bars

Tell us your diameter, length, quantity and delivery location. Our technical team will confirm availability and send a firm price within one business day.

Email: export@kalpatarupiping.com  |  sales@kalpatarupiping.com

Phone: 022-66337137 / 022-66394276 / 022-66394285

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FAQ

What is ASTM B446 for Inconel 625 round bars?

ASTM B446 is the standard specification for Nickel-Chromium-Molybdenum-Columbium alloy (UNS N06625) rod and bar. It covers the chemical and mechanical requirements of the material.

What is UNS N06625?

UNS N06625 is the Unified Numbering System designation for Inconel 625, a nickel-chromium-molybdenum alloy known for high strength and excellent corrosion resistance.

What is the maximum service temperature of Inconel 625?

Inconel 625 retains excellent mechanical properties up to 2,000°F (1093°C), making it suitable for high-temperature aerospace and industrial applications.

Is Inconel 625 weldable?

Yes. Inconel 625 is readily weldable by TIG, MIG, SMAW and plasma arc welding. It is commonly used as a filler material for welding dissimilar metals.

Do you provide EN 10204 3.1 MTC?

Yes. EN 10204 3.1 Mill Test Certificates are supplied as standard with every order. NABL-approved lab test reports are also available on request.

What finishes are available?

We supply Inconel 625 Round Bars in Bright Drawn (BD), Hot Rolled Black (HF/HR), HRAP, Rough Turned (RT), Centreless Ground (CG), Polished (POL) and Bright Annealed (BA) finishes.

What are the lead time and delivery options?

Ex-stock items ship within 3–7 business days. Custom or non-stock items are available within 3–6 weeks from order confirmation. We export via JNPT (Mumbai) and Mundra Port.

What are the lead time and delivery options?
Stock products are normally on hand ready to dispatch immediately. Lead time might be necessary to meet the production schedules of custom sizes or special conditions of heat treatment.
What tests are done before dispatch?

All bars are subject to chemical analysis, mechanical testing, hardness testing, dimensional inspection and surface finish verification. Third-party inspection by SGS, Bureau Veritas or Lloyd’s Register is available on request.

Which industries use Inconel 625 round bars?

Key industries include oil & gas, offshore marine, aerospace, chemical processing, nuclear, pharmaceutical and power generation.

Explore Other Inconel 625 Products We Offer

Inconel Products

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Bhopal, Lahore, Milan, Hyderabad, Pune, Vadodara, Pimpri-Chinchwad, Aberdeen, Howrah, Jeddah, Riyadh, Bogota, Petaling Jaya, Dallas, Lagos, Nagpur, Houston, Brisbane, Busan, Karachi, Coimbatore, Seoul, Caracas, Atyrau, Perth, Haryana, Bengaluru, Jaipur, Al Jubail, Kuwait City, Al Khobar, Sydney, Ranchi, Chiyoda, Noida, Chandigarh, Secunderabad, Ahvaz, Port-of-Spain, Singapore, Gurgaon, Rajkot, Rio de Janeiro, Abu Dhabi, Hong Kong, Surat, Sharjah, Hanoi, London, Muscat, Jakarta, Navi Mumbai, Istanbul, Kolkata, Cairo, Mumbai, Santiago, Montreal, Faridabad, Vung Tau, Bangkok, Ankara, Ahmedabad, Granada, Melbourne, Tehran, Visakhapatnam, New Delhi, Los Angeles, Ho Chi Minh City, Edmonton, La Victoria, Baroda, Thane, Nashik, Kuala Lumpur, Moscow, Ernakulam, Courbevoie, Calgary, Geoje-si, Indore, New York, Mexico City, Gimhae-si, Ludhiana, Kanpur, Ulsan, Thiruvananthapuram, Manama, Doha, Chennai, Madrid, Jamshedpur, Algiers, Dammam

Countries We Deliver

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