Company Process Advantages
Lost Foam Casting Technology
As the core technology at Changzhou SeaYao, Lost Foam Casting allows for the production of complex-shaped and high-precision castings, particularly suitable for high-temperature, wear-resistant, and corrosion-resistant environments. This process offers high precision, low post-processing costs, and excellent material utilization.
Centrifugal Casting Technology
Centrifugal casting is widely used for producing round and tubular castings, particularly for heat-resistant steel, wear-resistant steel, and other alloy steels. The centrifugal force ensures high density and superior mechanical properties of the castings, ensuring their stability in high-strength applications.
Precision Casting Technology
We employ precision casting technology to produce high-precision castings with fine details, widely used for high-end products requiring strict dimensional tolerances and intricate structures.
















Ability to Supply a Variety of High-Performance Materials
|
Material Grade |
International Standard |
Product Category |
Chemical Composition |
Main Element Content |
Usage Temperature |
|
ZG40Cr27Ni4 |
1.4823 |
HD |
Cr: 24.00-28.00, Ni: 4.00-6.00 |
Cr: 24.00-28.00, Ni: 4.00-6.00 |
1050℃ |
|
ZG40Cr22Ni10 |
1.4826 |
HF |
Cr: 19.00-23.00, Ni: 8.00-12.00 |
Cr: 19.00-23.00, Ni: 8.00-12.00 |
950℃ |
|
ZG30Cr28Ni10 |
- |
HE |
Cr: 26.00-30.00, Ni: 8.00-11.00 |
Cr: 26.00-30.00, Ni: 8.00-11.00 |
1050℃ |
|
ZG40Cr25Ni12 |
1.4837 |
HH |
Cr: 24.00-27.00, Ni: 11.00-14.00 |
Cr: 24.00-27.00, Ni: 11.00-14.00 |
1050℃ |
|
ZG30Cr28Ni16 |
- |
HI |
Cr: 26.00-30.00, Ni: 14.00-18.00 |
Cr: 26.00-30.00, Ni: 14.00-18.00 |
1100℃ |
|
ZG40Cr25Ni20Si2 |
1.4848 |
HK |
Cr: 23.00-27.00, Ni: 19.00-22.00 |
Cr: 23.00-27.00, Ni: 19.00-22.00 |
1100℃ |
|
ZG30Cr20Ni25 |
- |
HN |
Cr: 19.00-23.00, Ni: 23.00-27.00 |
Cr: 19.00-23.00, Ni: 23.00-27.00 |
1100℃ |
|
ZG40Cr19Ni39 |
1.4865 |
HU |
Cr: 17.00-21.00, Ni: 37.00-41.00 |
Cr: 17.00-21.00, Ni: 37.00-41.00 |
1020℃ |
|
ZG40Cr15Ni35 |
1.4806 |
HT |
Cr: 15.00-19.00, Ni: 33.00-37.00 |
Cr: 15.00-19.00, Ni: 33.00-37.00 |
1000℃ |
|
ZG40Cr25Ni35Nb |
1.4852 |
HPCb |
Cr: 24.00-28.00, Ni: 33.00-37.00, Nb: 0.8-1.8 |
Cr: 24.00-28.00, Ni: 33.00-37.00, Nb: 0.8-1.8 |
1100℃ |
|
ZG40Cr19Ni38Nb |
1.4849 |
- |
Cr: 18.00-21.00, Ni: 36.00-39.00, Nb: 1.2-1.8 |
Cr: 18.00-21.00, Ni: 36.00-39.00, Nb: 1.2-1.8 |
1020℃ |
|
ZG40Cr24Ni24Nb |
1.4855 |
- |
Cr: 23.00-25.00, Ni: 23.00-25.00, Nb: 0.8-1.8 |
Cr: 23.00-25.00, Ni: 23.00-25.00, Nb: 0.8-1.8 |
1050℃ |
|
ZG40Cr25Ni35 |
1.4857 |
HP |
Cr: 24.00-28.00, Ni: 33.00-37.00 |
Cr: 24.00-28.00, Ni: 33.00-37.00 |
1100℃ |
|
ZG1Cr20Ni32Nb |
1.4859 |
- |
Cr: 19.00-21.00, Ni: 31.00-33.00, Nb: 0.5-1.5 |
Cr: 19.00-21.00, Ni: 31.00-33.00, Nb: 0.5-1.5 |
1050℃ |
|
ZG45Cr12Ni60 |
- |
HW |
Cr: 10.00-14.00, Ni: 58.00-62.00 |
Cr: 10.00-14.00, Ni: 58.00-62.00 |
1100℃ |
|
ZG45Cr18Ni66 |
- |
HX |
Cr: 15.00-19.00, Ni: 64.00-68.00 |
Cr: 15.00-19.00, Ni: 64.00-68.00 |
1100℃ |
|
ZG1Cr28Co50 |
2.4778 |
- |
Cr: 27.00-30.00, Co: 48.0-52.0 |
Cr: 27.00-30.00, Co: 48.0-52.0 |
1200℃ |
|
ZG30Cr28Co50Nb |
2.4779 |
- |
Cr: 27.00-29.00, Co: 48.0-52.0, Nb: 1.50-2.50 |
Cr: 27.00-29.00, Co: 48.0-52.0, Nb: 1.50-2.50 |
1200℃ |
|
ZG40Cr28Ni48W5 |
2.4879 |
- |
Cr: 27.00-30.00, Ni: 47.00-50.00, W: 4.0-5.5 |
Cr: 27.00-30.00, Ni: 47.00-50.00, W: 4.0-5.5 |
1150℃ |
We offer a comprehensive range of alloy steel materials to meet the diverse needs of various applications and industries. Our products include heat-resistant steel, corrosion-resistant steel, wear-resistant steel, and can be custom-produced based on customer specifications.
Pre-sales Service Advantages
Professional Consultation
Our experienced technical team provides detailed product consultations and selection guidance. We help clients choose the most suitable alloy steel materials and processes based on their needs and application scenarios, ensuring precise and accurate choices.
Customized Solutions
We offer personalized services tailored to clients' specific requirements. Whether it's product size, material, functional needs, or special design requests, we provide bespoke solutions to meet every need.
3D Drawings and Technical Support
We provide precise 3D drawings, allowing clients to visualize product designs and structures clearly. Our engineering team follows up throughout the process, ensuring the design meets customer needs and solving any technical challenges.
Quick Response
We understand the importance of fast communication and decision-making in the pre-sales phase. Our sales and technical teams respond to inquiries promptly, ensuring no delays in providing solutions.
After-sales Service Advantages
Worry-free Assurance
We commit to providing comprehensive after-sales support. If clients encounter any issues during product usage, we will quickly offer solutions to ensure uninterrupted production.
01
Technical Support
Our technical team offers 24/7 online support, helping clients resolve technical issues to ensure long-term stable operation of the products.
02
Maintenance and Upgrade Services
For long-term clients, we offer regular product maintenance and technical upgrades to ensure equipment and products continue to perform at their best.
03
Rapid Response and Timely Feedback
Our after-sales service team is equipped with an efficient response mechanism, ensuring clients receive quick support and solutions when issues arise. Our goal is to minimize downtime and maximize production efficiency.
04
Precision Machining and Strict Quality Control
To ensure the highest quality for every casting, we have equipped our factory with state-of-the-art machining equipment, including CNC machines, precision milling machines, and other advanced processing tools. This modern equipment allows us to perform precision machining to meet the tightest tolerances and surface finish requirements.
From the initial inspection of raw materials to the final quality control checks before shipment, every step of the manufacturing process is carefully monitored. Our rigorous quality control system ensures that all products meet international standards, including ASTM, EN, and JIS, and are fully compliant with customer specifications.
Our quality control team conducts in-depth tests and inspections at every stage of production, including:
- Raw Material Inspection: Ensuring that all raw materials are sourced from reliable suppliers and meet strict chemical composition standards.
- In-Process Monitoring: Continuous quality checks during the casting and machining processes to prevent defects and ensure dimensional accuracy.
- End-of-Line Testing: Final inspections, including mechanical properties testing, non-destructive testing (NDT), and performance simulations to ensure that the product performs under the required operating conditions.
- Packaging and Shipping Inspection: Before products leave our facility, they undergo final visual inspections and are carefully packed to ensure safe and secure delivery.
This meticulous approach guarantees that our castings deliver exceptional performance, reliability, and durability, meeting the needs of industries that require the highest standards of quality. With a commitment to continuous improvement and a customer-focused approach, we are dedicated to delivering products that exceed expectations.
Other Services We Offer
★ Flexible Payment Options:
We understand the importance of smooth and secure financial transactions in international trade. To accommodate the needs of our global clients, we offer a variety of payment methods, including:
Telegraphic Transfer (T/T): Fast and secure bank transfer services for timely payments.
Letter of Credit (L/C): We accept letters of credit, providing added security for both parties in the transaction.
Platform Transactions: For added convenience, we can also facilitate transactions via trusted online platforms.
★ Comprehensive International Logistics System:
Our company has a robust international logistics network that ensures the safe and timely delivery of products to our clients worldwide. We collaborate with reliable logistics partners and shipping agents to ensure efficient transportation, handling, and customs clearance.
CIF (Cost, Insurance, and Freight): If clients prefer, we can offer CIF pricing, where we handle the cost of shipping, insurance, and freight to the destination port. This ensures that our customers receive hassle-free delivery with full protection during transit.
FOB (Free On Board): For clients who prefer to manage their own shipping and logistics, we also offer FOB pricing. In this case, the cost of shipping is borne by the buyer once the goods are loaded onto the vessel at the port of departure.
★ Custom Solutions for Shipping and Delivery:
We offer tailored shipping solutions to suit the specific requirements of each client. Whether it's ensuring the correct packaging, managing sensitive deliveries, or providing door-to-door services, we work with our customers to find the best logistics arrangements.
★ Dedicated Customer Support for International Transactions:
Our professional customer service team is available to assist with any questions or issues related to shipping, payment, and logistics. From the moment your order is placed until it reaches its destination, we ensure constant communication and provide updates on the status of your order.
By offering these flexible and comprehensive services, we aim to provide a seamless and efficient experience for our international customers, ensuring that all your needs are met with professionalism and reliability.

