Office Line
+86-15763932413
+86-15763932413
English  |
Carbon Steel Casting for Construction Machinery stands as the backbone of heavy-duty equipment performance, engineered to withstand the harshest operating conditions in construction, mining, and infrastructure development.
Chifine
These castings serve as critical components in excavators, bulldozers, cranes, and loaders, where reliability directly impacts project timelines and operational safety. Unlike wrought steel parts, our carbon steel castings offer superior design flexibility, enabling the production of complex geometries such as gear housings, bucket teeth, and pivot brackets that integrate multiple functions into a single, robust component. With a monthly production capacity of 10,000 units, we cater to global OEMs and aftermarket suppliers seeking consistent quality and on-time delivery for high-demand construction applications.
Our construction machinery castings are manufactured using premium carbon steel grades compliant with ASTM A27/A27M-19 standards, specifically Grade 70-40 (485-275 MPa) which delivers an optimal balance of strength and weldability. The chemical composition is precisely controlled: carbon (C) 0.20-0.30%, manganese (Mn) 0.70-1.00%, silicon (Si) 0.15-0.35%, with strict limits on sulfur (≤0.04%) and phosphorus (≤0.04%) to prevent brittleness. This formulation undergoes quenching and tempering heat treatment, resulting in a minimum tensile strength of 70 ksi (485 MPa) and yield strength of 40 ksi (275 MPa)—critical properties for withstanding dynamic loads and shock impacts in construction environments. Each batch is subjected to spectrometric analysis to ensure compliance with material specifications, providing traceable quality assurance for every component.
The castings exhibit excellent wear resistance due to their fine-grained microstructure, reducing downtime caused by component failure. Field tests show a 30% longer service life compared to standard cast steel in high-friction applications like bucket edges and hinge pins.
Utilizing advanced sand casting techniques with ISO 8062 CT10 tolerance grade, our castings achieve dimensional accuracy of ±0.53 mm for lengths up to 175 mm, ensuring seamless integration with mating components. Surface finishes of 25-50 μm Ra minimize friction and facilitate easier maintenance.
These carbon steel castings maintain structural integrity across a temperature range of -40°C to 300°C, making them suitable for operation in cold climates and desert environments alike. Their high impact resistance (≥20 J at -20°C) prevents catastrophic failure during sudden load shifts.
The optimized chemical composition allows for easy on-site welding and repair, a crucial advantage in remote construction sites. Post-weld heat treatment restores material properties without compromising structural integrity.
We offer end-to-end customization to meet unique project requirements, starting with rapid prototyping within 15 business days using 3D scanning and CAD modeling. Our engineering team collaborates with clients to optimize designs for casting manufacturability, reducing production costs by up to 15%. Material grades can be tailored—from Grade 60-30 for lower-stress applications to Grade 70-40 for high-load components—with additional options for corrosion-resistant coatings like galvanizing or epoxy painting. Production volumes range from 50-piece small batches to 10,000-unit mass production, supported by ISO 9001:2015 certification and full material traceability documentation. Our quality control includes non-destructive testing (ultrasonic and magnetic particle inspection) and mechanical property verification through tensile and impact testing, ensuring each delivery meets exacting industry standards.
These castings serve as critical components in excavators, bulldozers, cranes, and loaders, where reliability directly impacts project timelines and operational safety. Unlike wrought steel parts, our carbon steel castings offer superior design flexibility, enabling the production of complex geometries such as gear housings, bucket teeth, and pivot brackets that integrate multiple functions into a single, robust component. With a monthly production capacity of 10,000 units, we cater to global OEMs and aftermarket suppliers seeking consistent quality and on-time delivery for high-demand construction applications.
Our construction machinery castings are manufactured using premium carbon steel grades compliant with ASTM A27/A27M-19 standards, specifically Grade 70-40 (485-275 MPa) which delivers an optimal balance of strength and weldability. The chemical composition is precisely controlled: carbon (C) 0.20-0.30%, manganese (Mn) 0.70-1.00%, silicon (Si) 0.15-0.35%, with strict limits on sulfur (≤0.04%) and phosphorus (≤0.04%) to prevent brittleness. This formulation undergoes quenching and tempering heat treatment, resulting in a minimum tensile strength of 70 ksi (485 MPa) and yield strength of 40 ksi (275 MPa)—critical properties for withstanding dynamic loads and shock impacts in construction environments. Each batch is subjected to spectrometric analysis to ensure compliance with material specifications, providing traceable quality assurance for every component.
The castings exhibit excellent wear resistance due to their fine-grained microstructure, reducing downtime caused by component failure. Field tests show a 30% longer service life compared to standard cast steel in high-friction applications like bucket edges and hinge pins.
Utilizing advanced sand casting techniques with ISO 8062 CT10 tolerance grade, our castings achieve dimensional accuracy of ±0.53 mm for lengths up to 175 mm, ensuring seamless integration with mating components. Surface finishes of 25-50 μm Ra minimize friction and facilitate easier maintenance.
These carbon steel castings maintain structural integrity across a temperature range of -40°C to 300°C, making them suitable for operation in cold climates and desert environments alike. Their high impact resistance (≥20 J at -20°C) prevents catastrophic failure during sudden load shifts.
The optimized chemical composition allows for easy on-site welding and repair, a crucial advantage in remote construction sites. Post-weld heat treatment restores material properties without compromising structural integrity.
We offer end-to-end customization to meet unique project requirements, starting with rapid prototyping within 15 business days using 3D scanning and CAD modeling. Our engineering team collaborates with clients to optimize designs for casting manufacturability, reducing production costs by up to 15%. Material grades can be tailored—from Grade 60-30 for lower-stress applications to Grade 70-40 for high-load components—with additional options for corrosion-resistant coatings like galvanizing or epoxy painting. Production volumes range from 50-piece small batches to 10,000-unit mass production, supported by ISO 9001:2015 certification and full material traceability documentation. Our quality control includes non-destructive testing (ultrasonic and magnetic particle inspection) and mechanical property verification through tensile and impact testing, ensuring each delivery meets exacting industry standards.
