Monel K500 Seamless Pipe | UNS N05500

por admin / domingo, 05 Julio 2026 / Publicado en tubo de aleación

ASTM B163 · B165 · QQ-N-286

Monel K500
Tubo sin soldadura

UNS N05500 · W.Nr. 2.4375 — precipitation-hardened nickel-copper alloy with tripled yield strength vs. Monel 400. Engineered engineered for marine, aceite & Gas, y procesamiento químico.

Resistencia a la tracción (aged): ≥ 1100 MPa

⚙️ Dureza: 26–32 HRC

Densidad: 8.44 g/cm³

Premium Manufacturer

LTDPIPELINE

Hebei, China · EN 10204 3.1

Verified Heavy Industrial Supplier

ℹ️
What is Monel K500 Seamless Pipe?

Seamless Monel K500 Pipe (UNS N05500) is a high-performance nickel-copper alloy pipe known for its exceptional strength, Resistencia a la corrosión, and reliability in extreme environments. Unlike Monel 400, Monel K500 is an age-hardenable alloy. Through the addition of controlled amounts of aluminum (Alabama) y titanio (Ti), the material undergoes precipitation hardening, significantly increasing its mechanical strength. XinZhe manufactures seamless K500 piping that strictly complies with ASTM B163, ASTM B165, and QQ-N-286, delivering optimal dimensional tolerance and maximum resistance to stress-corrosion cracking in sour-gas environments.

Número UNS

N05500

Alloy System

Ni-Cu-Al-Ti

Hardening Type

Precipitation

Max Service Temp

480 ° C

Density Metric

8.44 g/cm³

Tabla 1: Chemical Composition of Monel K500

The elemental composition of Monel K500 is precision balanced to trigger precipitation hardening. Data in wt%.

Grado	C	MN	S	Si	Ni	Cu	Fe	Ti	Alabama
Monel 400	≤0.3	≤2.0	≤0.024	≤0.5	≥63.0	28.0-34.0	≤2.5	-	-
Monel K-500	≤0.2	≤1.5	≤0.015	≤0.5	≥63.0	27.0-34.0	0.5-2.0	0.3-1.0	2.2-3.5

Tabla 2: Typical Mechanical Properties of Monel K500

High performance yields under massive physical pressure metrics.

Resistencia a la tracción	Fuerza de producción	Alargamiento	Hardness Range
≥ 1100 MPa	≥ 758 MPa	≥ 20%	26-32 HRC

Tabla 3: Typical Physical Properties of Monel K500

Thermal and electronic characteristics under benchmark environments.

Densidad	Punto de fusion	Expansión térmica	Conductividad térmica	Módulo de elasticidad	Resistividad eléctrica
8.44 g/cm³	1315 – 1350 ° C	13.7 µm/m·°C (20-100° C)	17.5 W/m·K (20° C)	179 Tubería	0.62 x 10⁻⁶ Ω·m (20° C)

Tabla 4: Seamless Monel K500 Pipe ASTM B829 Size Tolerance Chart

Standardized metric size variance constraints (mm).

Nominal de (en. / mm)	OD Tolerance ±	la pared (Nominal) ±%	la pared (min) ±%
Sobre 0.400 (10) a 5/8 (16), excl	0.005 (0.13)	15	30
5/8 (16) a 1 1/2 (38), incl	0.0075 (0.19)	10	22
Sobre 1 1/2 (38) a 3 (76), incl	0.010 (0.25)	10	22
Sobre 3 (76) a 4 1/2 (114), incl	0.015 (0.38)	10	22
Sobre 4 1/2 (114) a 6 (152), incl	0.020 (0.51)	12.5	28
Sobre 6 (152) a 6 5/8 (168), incl	0.025 (0.64)	12.5	28
Sobre 6 5/8 (168) a 8 5/8 (219), incl	0.031 (0.79)	12.5	28

Monel K500 — Precipitation-Hardened Nickel-Copper Alloy Matrix

Monel K500 (UNS N05500) is a precipitation-hardenable nickel-copper alloy developed as a high-strength variant of Monel 400. The alloy maintains the same corrosion-resistant Ni-Cu matrix but incorporates aluminum (2.30–3.15%) y titanio (0.35–0.85%) additions that form gamma-prime Ni₃(Alabama,Ti) precipitates during age-hardening heat treatment. The result is a material that delivers roughly double the yield strength of annealed Monel 400 while preserving its outstanding resistance to seawater, hydrofluoric acid, and reducing chemical environments.

The Al and Ti additions also shift the Curie point down to approximately −101°C, keeping K500 non-magnetic across all practical service temperatures. Monel 400, por el contrario, can show weak ferromagnetism near room temperature because its Curie point sits around 21–49°C. This non-magnetic character, combined with NACE MR0175-compliant hardness (HRC ≤ 35) in the age-hardened condition, makes K500 the standard choice for downhole drilling tools, non-magnetic drill collars, and subsea valve components in sour-service environments.

Key differentiator: Monel K500 offers Monel-level seawater and HF acid resistance plus high mechanical strength — unique in the nickel alloy space.

Detailed Composition & Role of Elements

Per ASTM B865 / Ams 4676 Especificaciones. Weight percent metrics highlighting structural tasks.

ELEMENTO	min (%)	máximo (%)	Role in Alloy Matrix
níquel (Ni)	63.0	70.0	Elemento base. Provides high-temperature strength, Dureza, and electrochemical nobility.
Cobre (Cu)	27.0	33.0	Corrosion resistance driver — HF acid immunity and seawater resistance.
Aluminio (Alabama) ★	2.30	3.15	Gamma-prime former; lowers Curie point; reduces overall density footprint.
Titanio (Ti) ★	0.35	0.85	Co-forms gamma-prime precipitates; advances long-term creep resistance.
Planchar (Fe)	-	2.00	Residual from melting; strictly managed to prevent Curie point elevation.
manganeso (MN)	-	1.50	Deoxidizer agent; improves overall hot working operational capabilities.
Carbón (C)	-	0.25	Minor solid solution strengthener; limited to prevent micro carbide precipitation.
Silicio (Si)	-	0.50	desoxidante; supports high-temperature structural oxidation resistance.
azufre (S)	-	0.010	Tightly controlled to avoid hot cracking liabilities during welding procedures.

★ Elements exclusive to K500 variant (not existing in standard Monel 400 setups)

Mechanical Properties by Processing Condition

Select your pipe composition variant based on structural fabrication requirements.

Propiedad	de solución de solución	Age-Hardened	Cold-Worked + Aged	unidad
Resistencia a la tracción	620 min	965 min	1100 min	MPa
Fuerza de producción (0.2%)	275 min	690 min	790 min	MPa
Elongation Rate	25 min	20 min	10 min	%
Hardness Value	75–95 HRB	27–35 HRC	30–38 HRC	-

Elastic / Physical Constants (Age-Hardened status): Módulo de elasticidad 179 GPa · Shear Modulus 66 GPa · Poisson’s Ratio 0.32 · Fatigue Strength ~340 MPa (at 10⁷ cycles)

Propiedades físicas (Age-Hardened State)

Property Standard	Value Charted	Unit Metric
Density Matrix	8.44	g/cm³
Melting Range Limits	1315 – 1350	° C (2400–2460 °F)
Conductividad térmica (a 20 ° C)	17.5	W/m·K
Specific Heat Constant (a 20 ° C)	419	J/kg·K
Electrical Resistivity Profile (a 20 ° C)	0.62	µΩ · m
Coeficiente de expansión térmica (20–100°C)	13.7	µm/m·°C
Curie Temperature Threshold (Condición recocida)	−101	° C (No magnético)

Age-Hardening Behavior & Heat Treatment Guidelines

Getting parameters right is critical for predictable final structural performance metrics.

Process Step	Temperature Scope	tiempo / Cooling Specs	Metallurgical Transformation Effect
1. Solution Anneal	870 – 980 ° C	~1 hr per 25mm thickness, apagón de agua	Dissolves Al/Ti completely into solid solution; suave, highly machinable (75–95 HRB).
2. Cold Work (opcional)	-	10% a 20% total reduction	Introduces high dislocation density → drives finer γ’ precipitates for extreme strength.
3. Age Harden Treatment	580 – 600 ° C	6 a 16 horas, furnace or still air cooling	Triggers Gamma-prime Ni₃(Alabama,Ti) precipitation; peak structural hardness at ~595°C.

⚠ Overaging Hazard Limit: Sustained operational exposure above 480°C (or short excursions above 540°C) coarsens γ’ precipita. For applications above this thermal threshold, standard solid-solution strengthened Monel 400 is advised.

Corrosion Resistance Performance Matrix

Al and Ti components remain isolated within precipitates, keeping the Ni-Cu base immune to structural degradation.

Environment Profile	Performance Grade	Technical Field Remarks
agua de mar & Marine Operations	Outstanding Rating	Immune to chloride-induced SCC. Maintain minimum flow rates >0.6 m/s in stagnant environments.
Hydrofluoric Acid (HF)	Total Immunity	Resists all concentrations up to boiling thresholds. Standard for chemical processing shafts.
Servicio agrio (H₂S) — NACE MR0175	Certified Compliance	Age-hardened processing restricted to HRC ≤ 35 qualifies for intense downhole tools.

Monel K500 vs. Alternative Commercial Grades

K500 sits alone as the premier age-hardenable selection providing high yield resilience above 690 MPa.

Grado de aleación	fuerza	agua de mar	HF Acid	soldabilidad	Rel. Costo	Engineering Application Case
Monel K500	★★★★★	★★★★	★★★★★	★★	$$$$	High-strength marine & deep-well downhole
Monel 400	★★	★★★★	★★★★★	★★★★★	$$$	Weldable process equipment & core piping
Inconel 625	★★★★	★★★★★	★	★★★★	$$ $$$	Extreme oxidizing process environments
Inconel 718	★★★★★	★★	★	★★★	$$ $$ $	Aerospace engineering & high gas temps
17-4 PH SS	★★★★	★	★	★★★	$$	Budget option for dry/mild environments

Typical Field Deployments Across Core Industries

Sector Verticals	Aplicaciones típicas & Engineered Systems Forms
Marina & Costa afuera	Propeller shafts, heavy-duty pump shafts, valve stems, marine grade fasteners, specialty subsea springs, non-corrosive wire rope, high-load thrust washers.
aceite & Gas Infrastructure	Downhole oilfield drilling tools, non-magnetic drill collars, directional logging instrument components, subsea control valve trims, sour service wellhead bolting configurations.
Procesamiento químico	HF alkylation system pump impellers, hazardous acid mixer blades, industrial centrifuges, deep reactor pressure vessel internals.
Generación de energía	High pressure steam turbine anchoring bolts, cooling tower condenser support components, nuclear reactor control mechanisms.
Aerospace Systems	Heavy load landing gear hydraulic components, fluid fuel delivery actuators, specialized lock wire, high shear rate fasteners.

Applicable International Specifications & Normas

Standard ID	Formulario de producto / Operational Scope	Technical Field Context Notes
ASTM B865	Bar stock, Rod tracks, Wire profiles, Heavy Forgings, Ring tracks	Primary universal benchmark spec for K500 material forms.
ASTM B564 / ASME SB-564	Forjas de aleación de níquel (Pipeline Flanges, Heavy Fittings, Valve Bodies)	Standard pressure vessel service parameters validation.
Ams 4676	Bar stocks, Rings — Aerospace structural grade (Pre-Age Hardened)	Premium aviation field verification metrics enforcement.
QQ-N-286	Federal Specification for Ni-Cu-Al Hard Alloy Matrix	Defense / Heavy naval military structural build standards.
Nace Mr0175 / ISO 15156	Sour gas deployment environments — SSC Stress Crack Resistance	Limits maximum system hardness down to HRC ≤ 35 profiles.

Manufacturing Excellence & Quality Assurance Metrics

XinZhe employs advanced cold-drawing and precise age-hardening heat treatment to ensure every Monel K500 seamless pipe delivers optimal dimensional tolerance and maximum resistance to stress-corrosion cracking in sour-gas environments. Our production facility in Hebei, China, is equipped with state-of-the-art testing equipment including PMI (Identificación Positiva de Materiales), Prueba de ultrasonido, and hydrostatic testing to guarantee compliance with ASTM B163, ASTM B165, and QQ-N-286.

All pipes are supplied with EN 10204 3.1 Certificación, and we offer full traceability from melt to final delivery. Nuestra calidad control system includes dimensional inspection, Pruebas de dureza (HRC), and mechanical property verification (Resistencia a la tracción, Rendimiento, Alargamiento) on every lot. For sour service applications, we provide NACE MR0175-compliant certification with hardness ≤ 35 HRC upon request.

✅ Complete Facility Supply Scope Available: Seamless structural piping · Ground Round bars · Heavy Forge parts · Pipe Flanges · Custom Machined downhole components.

Approximate Weight Reference Chart – Monel K500 Seamless Pipe

Calculations evaluated based on baseline mass densities of 8.44 g/cm³ (kg/m metric parameters).

OD (mm)	WT 3 mm	WT 5 mm	WT 8 mm	WT 10 mm	WT 15 mm
21.3	1.36	2.01	2.89	-	-
33.4	2.25	3.50	5.10	6.10	-
48.3	3.35	5.34	8.10	9.90	14.20
60.3	4.23	6.82	10.52	12.95	18.90
88.9	6.35	10.35	16.20	20.10	29.80
114.3	8.20	13.50	21.10	26.30	39.20

Why Choose LTDPIPELINE for Monel K500 Seamless Pipe Requirements?

With decades of deep metallurgy knowledge in premium nickel alloy manufacturing, XinZhe delivers high-integrity seamless piping platforms complying with strict global benchmarks. Our Monel K500 pipes are engineered for critical severe conditions where ultimate load capability, Resistencia a la corrosión, and structural dependability are absolute requirements. We support projects with complete verification testing loops, competitive wholesale export pricing structures, and secure logistics paths.

✉️ Corporate Sales Email: [email protected]

Global Portal: www.ltdpipeline.com

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