Name: NiCr Pellets
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NiCr Pellets

NiCr pellets are precision-engineered nickel-chromium alloy particles manufactured through vacuum melting, gas atomization, and precision sizing processes. These pellets exhibit excellent oxidation resistance, stable electrical properties, and high-temperature strength, making them ideal for heating elements, resistance applications, and thermal spray coatings.

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◉ PRODUCT SPECIFICATION

1. Material Standards & Grades

Primary Standards:

ASTM B344 - Nickel-Chromium Alloy Electrical Heating Elements
IEC 60240 - Dimensions and Characteristics of Electric Heating Alloys
GB/T 1234 - High Resistance Alloys

Common Alloy Grades:

Grade	Ni Content (%)	Cr Content (%)	Other Elements	Key Characteristics
NiCr 80/20	78-80	19-21	Fe ≤ 1.0, Mn ≤ 1.0	Excellent oxidation resistance, high resistivity
NiCr 70/30	68-72	28-32	Fe ≤ 1.0, Mn ≤ 1.0	Higher temperature capability
NiCr 60/15	58-62	14-16	Fe 20-24, Mn ≤ 1.5	Cost-effective alternative
NiCr 35/20	34-36	18-20	Si 1.5-2.5, Fe balance	Special high-temperature applications

2. Chemical Composition (% by weight)

Element	NiCr 80/20	NiCr 70/30	NiCr 60/15	NiCr 35/20
Nickel	78-80%	68-72%	58-62%	34-36%
Chromium	19-21%	28-32%	14-16%	18-20%
Iron	≤ 1.0%	≤ 1.0%	20-24%	Balance
Manganese	≤ 1.0%	≤ 1.0%	≤ 1.5%	≤ 1.5%
Silicon	≤ 0.5%	≤ 0.5%	≤ 1.0%	1.5-2.5%
Carbon	≤ 0.08%	≤ 0.08%	≤ 0.10%	≤ 0.10%
Aluminum	≤ 0.5%	≤ 0.5%	≤ 0.5%	≤ 0.5%

3. Physical Properties

Property	NiCr 80/20	NiCr 70/30	NiCr 60/15	Test Standard
Density (g/cm³)	8.40	8.20	8.20	ASTM B328
Melting Point (°C)	1400	1380	1390	-
Electrical Resistivity (μΩ·cm)	108	112	105	ASTM B193
Thermal Conductivity (W/m·K)	12.5	11.8	13.2	ASTM E1225
Thermal Expansion Coefficient (10⁻⁶/K)	13.0	13.5	14.0	ASTM E228
Specific Heat Capacity (J/kg·K)	460	450	470	-

4. Mechanical Properties

Property	NiCr 80/20	NiCr 70/30	NiCr 60/15
Tensile Strength (MPa)	650-850	700-900	600-800
Yield Strength (MPa)	300-450	350-500	280-400
Elongation (%)	25-40	20-35	25-40
Hardness (HV)	150-200	170-220	140-190
Modulus of Elasticity (GPa)	190	195	185

5. Pellet Specifications

Parameter	Standard Sizes	Tolerance	Available Customization
Diameter	2mm, 3mm, 5mm, 8mm	±0.1mm	1-15mm available
Length	3-20mm (cylindrical)	±0.2mm	Custom lengths
Weight per Pellet	0.1g - 5.0g	±5%	Custom weights
Sphericity	≥90% (spherical pellets)	-	Various shapes available
Surface Roughness	Ra ≤ 3.2μm	-	Ra ≤ 1.6μm (precision)

6. Electrical Properties

Property	NiCr 80/20	NiCr 70/30	NiCr 60/15
Resistivity at 20°C (μΩ·cm)	108	112	105
Temperature Coefficient (10⁻⁶/°C)	100	90	110
Maximum Operating Temperature (°C)	1150	1200	1100
Recommended Operating Temperature (°C)	800-1000	900-1100	700-900

7. Packaging & Storage

Packaging Options:

Package Type	Capacity	Protection	Shelf Life
Vacuum Sealed Bags	1kg, 5kg	Nitrogen atmosphere	24 months
Sealed Plastic Jars	500g, 1kg	Desiccant included	18 months
Metal Cans	10kg, 25kg	Double sealing	36 months
Custom Packaging	As required	Special requirements	Custom

Storage Conditions:

Temperature: 15-25°C
Relative Humidity: < 40%
Environment: Clean, dry, ventilated
Special Requirements: Avoid direct sunlight and corrosive gases

8. Applications

Primary Applications:

Heating Elements: Industrial furnaces, household appliances
Resistance Materials: Precision resistors, electrical components
Thermal Spray: Protective coatings, surface engineering
Welding Materials: Filler metals, hardfacing applications
Electronics: Thin film circuits, electronic pastes
Research: Material science, experimental studies

Industry Applications:

Electrical and electronic industry
Heating equipment manufacturing
Aerospace and automotive
Industrial furnace construction
Research and development

9. Quality Control & Testing

Testing Methods:

Chemical Analysis: ICP-OES, XRF
Size Distribution: Laser particle size analysis
Surface Quality: Microscopic examination
Electrical Properties: Four-point probe measurement
Microstructure: Metallographic analysis
Purity Verification: GD-MS for high-purity grades

Quality Certification:

Material Certificate with full analysis
RoHS Compliance Certificate
REACH Compliance Statement
Custom test reports available
Batch traceability maintained

Technical Advantages:

Consistent composition and quality
Excellent high-temperature performance
Stable electrical characteristics
Good oxidation resistance
Reliable batch-to-batch consistency

All products are supplied with complete quality documentation and can be customized to meet specific application requirements and processing needs.

◉ Surfcae selection

SURFACE	CHARACTERISTIC	SUMMARY OF MANUFACTURING METHOD	APPLICATION
NO.1	Silvery white	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.1	lackluster	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.2D	Silvery white	After cold rolling, heat treatment and pickling are carried out	General material, deep material
NO.2B	Gloss is stronger than No.2D	After No.2D treatment, the final light cold rolling is carried out through the polishing roller	The general material
BA	As bright as a sixpence	No standard, but usually a bright annealed surface with high reflectivity.	Building materials, kitchen utensils
NO.3	Rough lapping	Grind with 100~200# (unit) strop tape	Building materials, kitchen utensils
NO.4	Intermediate grinding	Polished surface obtained by grinding with 150~180# strop abrasive tape	Building materials, kitchen utensils
NO.240	Fine lapping	Grinding with 240# strop abrasive tape	kitchenware
NO.320	Very fine grinding	Grinding was carried out with 320# strop abrasive tape	kitchenware
NO.400	The luster is close to BA	Use 400# polishing wheel to grind	General timber, building timber, kitchen appliances
HL	Hairline grinding	Suitable particle material for hair stripe grinding (150~240#) with many grains	Building, construction material
NO.7	It's close to mirror grinding	Use a 600# rotary polishing wheel to grind	For art or decoration
NO.8	Mirror ultrafinish	The mirror is ground with a polishing wheel	Reflector, for decoration