When your application demands an alloy that simply refuses to corrode — whether it is sitting in a brine-flooded offshore platform, a hydrofluoric acid pickling line, or a high-pressure marine heat exchanger Monel round bar is the material engineers reach for first. A nickel-copper alloy with 63–70% nickel content, Monel delivers a rare combination of high tensile strength, outstanding corrosion resistance in reducing environments, and exceptional performance across a wide temperature range, from cryogenic lows to over 600°C.
At Kalpaturu Piping, we manufacture and supply ASTM B164 / ASME SB164 Monel round bars in grades Monel 400 and Monel K500, covering diameters from 2 mm to 500 mm in hot-rolled, cold-drawn, forged, and precision-ground finishes. Every bar leaves our facility with full mill test certificates, third-party inspection reports, and compliance documentation certified to NACE MR0103 and NACE MR0175 — so your procurement and quality teams have everything they need from day one. Request a quote or download our current Monel round bar price list to compare today.
Table of Contents
- ASTM B164 Monel Round Bar Specifications
- Monel Round Bar Chemical Composition (ASTM B164)
- Monel Round Bar Mechanical Properties
- Monel Round Bar Price List
- Monel Round Bar Weight Chart (Monel 400 — Selected Sizes)
- Monel Round Bar Applications
- Monel Round Bar Applications
- Key Metallurgical Advantages of Monel
- Why Kalpaturu Piping
- Quality, Testing & Certifications
- Testing Methods
- Documentation Supplied
- Standards & Approvals
- FAQs – Monel Round Bar
Monel Round Bars And Monel Wires
Kalpaturu Piping stocks and exports Monel round bars under ASTM B164 / ASME SB164, covering both the commercially pure nickel-copper grade (Monel 400 / UNS N04400) and the precipitation-hardenable age-hardened variant (Monel K500 / UNS N05500). These bars are produced via hot-rolling, cold-drawing, or forging and are available in the following product forms:
|
Product Form |
Description |
|---|---|
|
Monel Round Bar |
Standard cylindrical rod, hot rolled or cold drawn |
|
Monel Precision Ground Bar |
Centreless-ground for tight diameter tolerances |
|
Monel Hex Bar |
Hexagonal section for valve stems and machined parts |
|
Monel Square Bar |
Square section for tooling and fabrication |
|
Monel Flat Bar |
Flat profile for structural and machined applications |
|
Monel Forged Bar |
Forged billet for high-integrity pressure applications |
|
Monel Threaded Rod |
Ready-to-use studding in Monel 400 or K500 |
|
Monel Bright Bar |
Cold-finished, smooth surface for precision machining |
All bars conform to ASTM B164 (standard) and ASME SB164 (pressure vessel code), with additional compliance to AMS 4731, AMS 4675, AMS 4730, BS3076 NА13, QQ-N-281, VdTUV 263, and DIN 17743 where required by the end application.
Related Monel products from Kalpaturu Piping: Monel Pipes & Tubes · Monel Flanges · Monel Fasteners · Monel Fittings · All Monel Products
ASTM B164 Monel Round Bar Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM B164 / ASME SB164 |
| Grades | Monel 400 (UNS N04400, 2.4360) · Monel K500 (UNS N05500, 2.4375) |
| Round bar diameter | 2 mm to 500 mm (custom billets on request) |
| Flat bar size | 3–800 mm (dia) × 10–500 mm (width) |
| Hex bar | 3/16" to 3" (across flats); metric 5 mm to 100 mm |
| Square bar | 5 mm to 200 mm |
| Hollow bar | OD 32–250 mm × ID 16–200 mm |
| Length | Standard 3–6 m; cut-to-length up to 6,500 mm |
| Tolerance | K11, H8, H9, H11, H12, H13, H10, H9, K9, K10, H11 or as agreed |
| Surface finish | Hot-rolled (HR), Cold-drawn bright (CD), Centreless ground (CG), Peeled & turned (P&T), Polished, Satin, Black |
| Condition | Annealed (ANN), Hardened & Tempered (H&T), Precipitation Hardened (PH) |
| Technique | Hot rolled, Cold rolled, Cold drawn, Forged |
| Processing | Cutting, Machining, Heat treatment, Welding, Cold working, Hot working |
| International equiv. | DIN 2.4360 (Monel 400) · DIN 2.4375 (Monel K500) · JIS NW 4400 · BS NA 13 · GOST MHNKMts28-2.5-1.5 · AFNOR NU-30M · EN NiCu30Fe |
Inspection & Test Certificates supplied:
- EN 10204 / 3.1B mill test report
- Raw material test certificate
- 100% radiographic test report (on request)
- Third-party inspection (Bureau Veritas, SGS, TUV, Lloyds) on request
- NACE MR0103 / NACE MR0175 compliance
Monel Round Bar Chemical Composition (ASTM B164)
| Element | Monel 400 (UNS N04400) | Monel K500 (UNS N05500) |
|---|---|---|
| Nickel (Ni) + Cobalt | 63.0% min | 63.0% min |
| Copper (Cu) | 28.0–34.0% | 27.0–33.0% |
| Iron (Fe) | 2.5% max | 2.0% max |
| Manganese (Mn) | 2.0% max | 1.5% max |
| Carbon (C) | 0.30% max | 0.25% max |
| Silicon (Si) | 0.50% max | 0.50% max |
| Sulfur (S) | 0.024% max | 0.010% max |
| Aluminum (Al) | — | 2.30–3.15% |
| Titanium (Ti) | — | 0.35–0.85% |
Monel Round Bar Mechanical Properties
| Property | Monel 400 (Annealed) | Monel K500 (Age-hardened) |
|---|---|---|
| Tensile Strength (Ultimate) | 550 MPa (80 ksi) min | 930 MPa (135 ksi) min |
| Yield Strength (0.2% offset) | 240 MPa (35 ksi) min | 620 MPa (90 ksi) min |
| Elongation at Break | 35% min | 20% min |
| Hardness (Brinell) | ≤ 149 HB | ≤ 300 HB |
| Density | 8.80 g/cm³ | 8.44 g/cm³ |
| Melting Range | 1,300–1,350°C | 1,315–1,350°C |
| Modulus of Elasticity | 179 GPa | 179 GPa |
| Max Service Temperature | 480°C (continuous) | 540°C (age-hardened) |
Monel Round Bar Price List
Prices below are indicative reference rates based on prevailing LME nickel and copper rates as of October 2026. Final pricing depends on grade, diameter, length, quantity, surface finish, and delivery destination. Contact Kalpaturu Piping for a firm quote.
| Description | Per Unit (INR) | Price (USD) | Price (EUR) |
|---|---|---|---|
| Monel 400 Round Bar — Dia 12.2 × 3500 mm (ASTM B164) | ~1,060 | ~14.50 | ~11.96 |
| Nickel Alloy Round Bar Grade Monel 400, UNS N04400 | ~869 | ~11.79 | ~9.72 |
| Monel 400 Round Bars (Re-export, No Ex-Bonding), small qty | ~37,404 | ~507 | ~418 |
| Monel 400 Round Bars (Re-export, No Ex-Bonding), large qty | ~1,06,270 | ~1,442 | ~1,189 |
| Nickel Copper Bar Monel 400 Dia 14.28 × 3000 mm H12 | ~1,234 | ~17.01 | ~14.03 |
| Nickel Alloy Round Bar Monel (Ni≥65%, Cu≥32%) | ~447 | ~6.06 | ~5.00 |
| Round Bar Monel 400 Dia 12.2 × 3500 mm H12 (ASTM B164) | ~1,212 | ~16.44 | ~13.56 |
Prices are ex-Mumbai warehouse, excluding GST, freight, and packing. Minimum order quantity applies. Request a current quote →
Factors affecting Monel round bar price per kg:
- Grade (Monel 400 vs K500 — K500 typically commands a 20–30% premium)
- Diameter (larger diameters = higher per-kg cost for precision-ground finishes)
- Surface condition (bright/cold-drawn costs more than hot-rolled)
- Quantity (mill direct pricing available for orders above 1 MT)
- Delivery format (cut-to-length vs standard length)
Monel Round Bar Weight Chart (Monel 400 — Selected Sizes)
| Diameter | kg/m | Diameter | kg/m | Diameter | kg/m |
|---|---|---|---|---|---|
| 3 mm | 0.062 | 20 mm | 2.470 | 50 mm | 15.41 |
| 5 mm | 0.154 | 25 mm | 3.871 | 60 mm | 22.21 |
| 6 mm | 0.223 | 30 mm | 5.548 | 75 mm | 34.68 |
| 8 mm | 0.398 | 35 mm | 7.553 | 100 mm | 55.48 |
| 10 mm | 0.620 | 40 mm | 9.872 | 125 mm | 86.68 |
| 12 mm | 0.899 | 45 mm | 12.56 | 150 mm | 124.9 |
| 16 mm | 1.578 | 48 mm | 14.21 | 200 mm | 221.9 |
| 18 mm | 2.001 | 50 mm | 15.41 | 250 mm | 346.7 |
Density used: 8.82 g/cm³ (Monel 400). Formula: W (kg/m) = (D² × 0.006165) × density factor.
Monel Hex Bar Weight Chart (Selected Sizes)
| Hex Size (inches) | kg/m | kg per 12 ft |
|---|---|---|
| 1/4" | 0.160 | 2.160 |
| 3/8" | 0.625 | 4.920 |
| 1/2" | 0.740 | 8.880 |
| 3/4" | 1.660 | 19.92 |
| 1" | 2.90 | 34.80 |
| 1-1/4" | 4.625 | 55.20 |
| 1-1/2" | 6.625 | 79.20 |
| 2" | 11.80 | 141.6 |
| 3" | 26.53 | 318.4 |
Standard Length Options
| System | Standard Length |
|---|---|
| Metric | 3 m, 6 m, 9 m, 12 m |
| Imperial (US) | 12 ft (3.66 m), 20 ft (6.10 m), 40 ft |
| Cut-to-length | Up to 6,500 mm on request |
Use our pipe and tube weight calculator or contact us for a custom weight confirmation before ordering.
Monel Round Bar Applications
Monel round bar is specified across demanding industries wherever conventional stainless steel falls short. Here is where you will find it in service:
| Industry | Typical Application |
|---|---|
| Oil & Gas / Offshore | Pump shafts, valve stems, drill collars, subsea fasteners |
| Marine Engineering | Propeller shafts, rudder pins, sea-water piping, heat exchangers |
| Chemical Processing | Agitator shafts, reaction vessel internals, HF acid service equipment |
| Power Generation | Condensers, feedwater heaters, turbine components |
| Desalination Plants | Brine pump shafts, evaporator tube sheets, saline water handling |
| Pharmaceutical Equipment | Autoclave fittings, reaction vessels, hygienic shafts |
| Pulp & Paper | Bleach plant shafts, washer drums, press rolls |
| Aerospace & Defence | Aircraft fuel system components, structural fasteners |
| Specialty Chemicals | HF alkylation units, sulfuric acid coolers, brine service |
| Nuclear Industry | Reactor components, control rod drive mechanisms |
Why Monel outperforms in these environments: Monel 400’s corrosion rate in flowing seawater is virtually zero — under 25 μm/year. In hydrofluoric acid at all concentrations, it is one of only a handful of alloys that remain stable. Its passive film, unlike stainless steel, does not break down in chloride-rich environments, making crevice corrosion and stress-corrosion cracking in seawater a non-issue.
Key Metallurgical Advantages of Monel
- Superior corrosion resistance in seawater, brine, HF acid, alkaline solutions, and reducing environments
- No pitting or crevice corrosion in chloride environments — where 316L stainless would fail
- High strength-to-weight ratio compared to nickel 200 and copper alloys
- Wide service temperature range: cryogenic (−200°C) to +480°C continuous; K500 to +540°C
- Excellent machinability in annealed condition; machinable to fine tolerances for pump shafts
- Non-magnetic in annealed state (Monel 400) — suitable for compass bearings and sensitive instruments
- Low corrosion rate in fast-flowing seawater — less than 0.025 mm/year at velocities up to 4 m/s
- Biofilm and MIC resistance in marine environments due to copper content
Why Kalpaturu Piping
| Factor | What We Deliver |
|---|---|
| Stock availability | Ready stock of Monel 400 round bars from 6 mm to 200 mm dia, Mumbai |
| Mill traceability | Every heat lot traceable; MTCs supplied as standard |
| Custom cutting | Cut-to-length up to 6,500 mm; same-day despatch for stocked sizes |
| Export experience | Export to 50+ countries; MSDS, packing lists, fumigation certs included |
| Quality system | ISO 9001 processes; in-house chemical & dimensional lab |
| Competitive pricing | Direct-from-mill sourcing reduces costs vs. trading intermediaries |
| Technical support | Dedicated metallurgical team for grade selection and application queries |
Quality, Testing & Certifications
Every Monel round bar dispatched by Kalpaturu Piping is backed by a rigorous quality assurance process. Our testing capabilities and the documentation package we supply with each order:
Testing Methods
| Test Type | Method / Standard |
|---|---|
| Chemical Analysis | Optical Emission Spectrometry (OES) to ASTM B164 |
| Tensile & Yield Strength | Universal Testing Machine per ASTM E8 |
| Hardness Testing | Brinell (HB) / Rockwell (HRC) |
| Radiographic Testing | 100% RT on request (per ASTM E94) |
| Ultrasonic Testing | UT to ASTM A388 for forged bars |
| Eddy Current Testing | Surface and subsurface defect detection |
| Pitting Corrosion Test | ASTM G48 Method A/B on request |
| Positive Material Identification | Handheld XRF (PMI) per heat |
Documentation Supplied
- EN 10204 / 3.1 Mill Test Report
- Raw Material Test Report
- Certificate of Origin (legalized/attested by Chamber of Commerce or Embassy)
- Test certificates certifying NACE MR0103, NACE MR0175
- Material Traceability Records
- Packing list (net weight, gross weight, number of boxes, marks & numbers)
- Quality Assurance Plan (QAP)
- Fumigation Certificate (for wood packaging)
- Heat Treatment Charts
- Commercial Invoice with HS Code
Standards & Approvals
| Standard | Description |
|---|---|
| ASTM B164 | Standard specification for Monel round, square, hexagonal bar and wire |
| ASME SB164 | ASME Boiler & Pressure Vessel Code equivalent |
| AMS 4731 / 4675 / 4730 | Aerospace Material Specifications for Monel |
| BS 3076 NA13 | British Standard for Monel alloy bar |
| QQ-N-281 | US Military specification |
| VdTUV 263 | German approval for pressure equipment |
| DIN 17743 | German standard for nickel-copper alloys |
Related Products
FAQs – Monel Round Bar
Q1: What is a Monel round bar?
Q2: What is the difference between Monel 400 and Monel K500 round bar?
Q3: What is the price of Monel round bar per kg in India?
Q4: What standard does ASTM B164 cover?
Q5: Which size Monel round bars does Kalpaturu Piping stock?
Q6: Can Monel round bar be used in seawater service?
Q7: What finishes are available for Monel round bar?
Request a Quote — Monel Round Bar Price List
Get the Best Monel Round Bar Price in India — Direct from Manufacturer & Stockist
Kalpaturu Piping maintains ready stock of Monel 400 and Monel K500 round bars in Mumbai. Whether you need a single piece for a repair job or a bulk order for a project shutdown, we deliver on time, every time.
Why source from Kalpaturu Piping?
- Mill-direct pricing — no middlemen, lowest price guarantee
- Same-day quotation on standard sizes in stock
- Export-ready documentation: EN 10204 3.1 MTC, CoO, fumigation, packing list
- Worldwide shipping: UAE, Saudi Arabia, UK, USA, Singapore, Australia, and 50+ countries
- NACE MR0175 / MR0103 compliant material always available
- Third-party inspection: BV, SGS, TUV, Lloyds on request
To receive a firm price, share with us:
- Grade — Monel 400 or Monel K500
- Diameter (mm) and length (mm or feet)
- Quantity (kg or pieces)
- Surface finish required (HR / CD / Ground / Polished)
- Delivery destination (city / port)
- Required certifications / test reports
Not sure which grade you need? Our metallurgical team can help you select the right Monel alloy for your application. Explore our full range of Monel products including Monel pipes & tubes, Monel flanges, Monel fasteners, and Monel fittings.
Response guaranteed within 24 business hours. For urgent requirements, call or WhatsApp directly.
