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{"title":"25 * 20mm Pressureless Sintered SiC Roller","imgUrl":"https:\/\/img.chinax.com\/nimg\/99\/b5\/6f13036b160ed21265b991ffd333-200x200-1\/25_2a_20mm_pressureless_sintered_sic_roller.jpg","attrs":{"Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Minimum Order Quantity":"Negotiable","Place of Origin":"China","Packaging Details":"Strong wooden box for Global shipping"}}
{"title":"14*11 Pressureless Sintered SiC Roller","imgUrl":"https:\/\/img.chinax.com\/nimg\/4a\/4f\/3a1b020de27f6492ed960ccdb4f9-200x200-1\/14_2a11_pressureless_sintered_sic_roller.jpg","attrs":{"Minimum Order Quantity":"Negotiable","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Model Number":"Customizable","Place of Origin":"China"}}
{"title":"Pressureless Sintered SSiC Mechanical Seal Rings with 1650\u00b0C Max Service Temp","imgUrl":"https:\/\/img.chinax.com\/nimg\/93\/b2\/0aa180e09cc5b38b9916cdc6a71d-200x200-1\/pressureless_sintered_ssic_mechanical_seal_rings_with_1650_c2_b0c_max_service_temp_zero_free_silicon_and_high_purity.jpg","attrs":{"Minimum Order Quantity":"Negotiable","Delivery Time":"Negotiable","Model Number":"Customizable","Brand Name":"KEGU"}}
{"title":"Premium-Grade Sintered Silicon Carbide (SSiC) Structural Beams 30\u202fmm\u202f\u00d7\u202f40\u202fmm\u202f\u00d7","imgUrl":"https:\/\/img.chinax.com\/nimg\/77\/9c\/4660317dc063f8f070c9b4193768-200x200-1\/premium_grade_sintered_silicon_carbide_28ssic_29_structural_beams_30_e2_80_afmm_e2_80_af_c3_97_e2_80_af40_e2_80_afmm_e2_80_af_c3_9.jpg","attrs":{"Minimum Order Quantity":"Negotiable","Price":"Negotiable","Delivery Time":"Negotiable","Packaging Details":"Strong wooden box for Global shipping"}}
{"title":"8-9mm Pressureless Sintered Silicon Carbide Grinding Balls with 2000-2500 Hv","imgUrl":"https:\/\/img.chinax.com\/nimg\/f1\/3a\/6d66a911bd2e44c59cdddf68b969-200x200-1\/8_9mm_pressureless_sintered_silicon_carbide_grinding_balls_with_2000_2500_hv_hardness_2c_1600_c2_b0c_max_service_temperature_2c_an.jpg","attrs":{"Price":"Negotiable","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Place of Origin":"China","Model Number":"Customizable"}}
{"title":"Black Silicon Carbide Refractory Bricks with High-Temp Abrasion and Thermal","imgUrl":"https:\/\/img.chinax.com\/nimg\/9e\/0f\/ffaec3f17d4bc47603a77361b043-200x200-1\/black_silicon_carbide_refractory_bricks_with_high_temp_abrasion_and_thermal_shock_resistance_for_extreme_industrial_use.jpg","attrs":{"Brand Name":"KEGU","Place of Origin":"China","Price":"Negotiable","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram"}}
{"title":"High-Performance Silicon Carbide Rollers with 1650\u00b0C Service Temperature, 196 W","imgUrl":"https:\/\/img.chinax.com\/nimg\/0a\/3c\/31e233b3a869adadec6c4d58d5fb-200x200-1\/high_performance_silicon_carbide_rollers_with_1650_c2_b0c_service_temperature_2c_196_w_2fm_2ak_thermal_conductivity_2c_and_380mpa_.jpg","attrs":{"Delivery Time":"Negotiable","Usage":"Industry Usage","Chemical Composition":"Al2O3, SiO2","Sic Content":"85%"}}
This product is manufactured from high-purity pressureless sintered silicon carbide (SSiC) with an outer diameter of 25 mm and an inner diameter of 20 mm. Through precision grinding, both the outer and inner diameter tolerances are controlled to within ±0.15 mm (total tolerance 0.3 mm), meeting demanding dimensional accuracy requirements for industrial applications.
SSiC Material Properties
Property Category
Parameter
Value / Range
Key Advantage
Material Purity
SiC Content
≥98.5 Vol%
High purity, stable performance
Densification
Density at 20°C
≥3.05 g/cm³
Dense structure, no visible pores
Densification
Open Porosity
≈0 Vol%
Fully dense, excellent impermeability
Hardness & Wear Resistance
Rockwell 45N Hardness
93 R45N
Extremely high hardness, excellent wear resistance
Hardness & Wear Resistance
Vickers HV1 Hardness
2350 kg/mm²
Far exceeds ordinary ceramics and metals
Mechanical Strength
Flexural Strength at 20°C
≥380 MPa
Strong room-temperature rigidity
Mechanical Strength
Flexural Strength at 1300°C
≥420 MPa
Strength does not decrease at high temperature
Mechanical Strength
Elastic Modulus at RT
410 GPa
Excellent resistance to deformation
Thermal Properties
Coefficient of Thermal Expansion
4.0×10⁻⁶ /K
Good dimensional stability
Thermal Properties
Thermal Conductivity at 20°C
116 W/(m*K)
Outstanding thermal dissipation
Thermal Properties
Thermal Conductivity at 1200°C
35 W/(m*K)
Maintains good thermal conductivity at high temperature
Thermal Properties
Thermal Shock Resistance
ΔT > 350°C
Resists rapid heating/cooling, not prone to cracking
Thermal Properties
Maximum Service Temperature in Air
1650°C
Suitable for long-term ultra-high temperature use
Corrosion Resistance
Based on measured comparative data, the SSiC rod/tube exhibits an annual corrosion weight loss of <0.2 mg/cm²/yr in the following aggressive corrosive media (highest corrosion resistance level):
Comparative advantage: In strong alkali (50% NaOH) and hydrofluoric acid (53% HF) environments, reaction-bonded SiC and alumina show corrosion losses >1000 mg/cm²/yr (failure within days), whereas SSiC exhibits virtually no corrosion and can be used for long periods.
Machining and Tolerance Control
Parameter
Nominal Value
Tolerance Capability
Remarks
Outer Diameter
25 mm
±0.15 mm
Total tolerance 0.3 mm, precision ground
Inner Diameter
20 mm
±0.15 mm
Total tolerance 0.3 mm, coaxial machining available
Wall Thickness
2.5 mm
Concentricity ≤0.2 mm
Ensures uniform wall thickness
Length
Customized
±0.5 mm per 500 mm
Maximum machinable length 1500 mm
Straightness
≤0.8‰
Over full length
Meets kiln transport and sealing requirements
End Face Perpendicularity
≤0.1 mm
Relative to OD datum
Facilitates installation and connection
The outer and inner diameter tolerances are controlled within 0.3 mm. High-precision internal grinding machines and centerless grinders are used to ensure dimensional consistency along the entire length of the rod/tube. Custom end chamfering, stepped profiles, flanges, and other structures are available upon request.
Surface Quality and Appearance Requirements
Surface roughness: OD ground to Ra ≤0.8 μm; ID can be fine-ground to Ra ≤0.4 μm upon request.
Visual defects: No cracks, no pores or impurity spots larger than 0.5 mm in diameter. No edge chipping on end faces.
Dye penetrant inspection (optional): Performed according to ASTM E1417 to detect surface-opening defects, ensuring no through-wall cracks.
Quick Comparison with Rods/Tubes Made of Other Materials
Parameter
SSiC (This Product)
Reaction-Bonded SiC (RSiC)
Alumina (Al₂O₃)
Tungsten Carbide (WC)
Density (g/cm³)
≥3.05
3.02
3.8-3.9
14.9
Max. Service Temperature (°C)
1650
1380
1650 (but strength degrades)
800
Free Silicon Content
None
~10-20%
None
None
Alkali Corrosion Resistance (50% NaOH)
<0.2 mg/cm²/yr
>1000 (failure within days)
>1000 (severe corrosion)
Good
Hydrofluoric Acid Corrosion Resistance
Excellent (<0.2)
Poor
Poor
Moderate (8.0)
Volume Resistivity (Ω*cm)
>10¹⁰
Conductive
Insulating
Conductive
Relative Cost
Medium-High
Medium
Low
Very High
This product offers outstanding combined performance in high-temperature, strong-corrosion, and wear-resistant applications, making it particularly suitable for harsh conditions such as strong alkalis, hydrofluoric acid, and high-temperature oxidizing atmospheres.
Typical Application Scenarios
High-temperature roller kilns: Sintering of lithium battery materials, rapid firing of ceramics, debinding of electronic ceramics
Chemical heat exchangers: Sulfuric acid concentration, phosphoric acid production, hydrofluoric acid regeneration units
Thermocouple protection tubes: Temperature measurement in aluminum melting furnaces, glass melting furnaces, incinerators
Mechanical seals: Wear-resistant sealing sleeves for chemical pumps handling media containing solid particles
For further information or to discuss your specific requirements, please contact us directly.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2017
Total Annual:
800-850
Employee Number:
60~70
Ecer Certification：
Verified Supplier
Founded in 2017, Kegu is a leading advanced materials developer based in China’s Xixian New District, Qinhan New City—strategically positioned near major transport links including the Xianyang East Expressway. With a registered capital of 35.5 million RMB (approx. 5 million USD), we o...
Founded in 2017, Kegu is a leading advanced materials developer based in China’s Xixian New District, Qinhan New City—strategically positioned near major transport links including the Xianyang East Expressway. With a registered capital of 35.5 million RMB (approx. 5 million USD), we o...
