Metallurgical & Steel Industry
Slag pots, slag ladles, rolling mill housings and bearing chocks for steel plants worldwide. Our steel casting foundry pours slag pots from 5m³ to 20m³+ in ZG230-450 and GS-20Mn5, with LF-refined steel, 100% UT/MT inspection and full EN 10204 3.1 certification.
Rolling Mill Bearing Housing (Chock)
- Weight:
- 5 – 60 T
- Material:
- ZG270-500, ZG35CrMo
Material Bell (Blast Furnace)
- Weight:
- 10 – 80 T
- Material:
- ZG230-450, heat-resistant alloy
Hopper (Blast Furnace)
- Weight:
- 10 – 90 T
- Material:
- ZG230-450, heat-resistant alloy
Metallurgy & Steel Castings — Domande frequenti
Advanced Materials for Slag Ladle Manufacturing
Slag pots live through brutal thermal cycling — molten slag at 1,500°C on the inside, water quenching on the outside. We pour them in fine-grained ZG230-450 or GS-20Mn5 with strictly limited sulfur and phosphorus (LF refining), which preserves ductility and resists thermal fatigue. For mill housings and chocks, ZG270-500 and ZG35CrMo provide the stiffness and fatigue strength rolling lines demand.
How We Eliminate Thermal Cracking in Heavy Castings
Cracking starts with stress concentration and poor steel cleanliness. Our process attacks both: casting simulation optimizes riser and chill placement; generous fillets and uniform wall transitions are verified at design review; LF refining removes inclusions; and stress-relief heat treatment after rough machining brings residual stress down before the casting ever sees service. The result is documented service lives 30%+ longer than as-cast, unrefined equivalents.
How do you prevent internal defects like blowholes, sand inclusions, and cracks in large steel castings?
We eliminate internal defects through a multi-stage control system. First, we use Ladle Furnace (LF) refining to degas and purify the molten steel, strictly limiting sulfur and phosphorus levels. Second, we optimize the gating system using casting simulation software. Finally, every critical area undergoes 100% Non-Destructive Testing (NDT), including Ultrasonic (UT) and Magnetic Particle (MT) testing, ensuring zero critical defects before shipment.
What in-house Non-Destructive Testing (NDT) capabilities do you have?
Our in-house NDT laboratory is fully equipped and certified. We perform Ultrasonic Testing (UT), Magnetic Particle Testing (MT), and Liquid Penetrant Testing (PT). For special requirements, Radiographic Testing (RT) can also be arranged. All our NDT inspectors hold international certifications (Level II or Level III) to guarantee inspection accuracy.
How do you guarantee the stability and consistency of mechanical properties across different batches?
Consistency comes from standardized heat treatment and digital microstructural analysis. We utilize large, computer-controlled natural gas heat treatment furnaces to perform precise annealing, normalizing, and tempering. Every heat code is tracked, and samples from the same pouring batch are tested for tensile strength, yield strength, impact toughness, and hardness to ensure they perfectly match your specifications.
Can you provide full material traceability and Material Test Reports (MTR)?
Absolutely. Every casting is stamped with a unique Heat Number for lifetime traceability. With each shipment, we deliver a comprehensive document package including Material Test Reports (MTR) complying with EN 10204 3.1, chemical analysis reports (via direct-reading spectrometer), mechanical testing data, and NDT clearance certificates.
What is your typical lead time for a custom heavy steel casting like a slag pot or girth gear?
For large customized castings, the lead time generally ranges from 45 to 75 days, depending on the geometric complexity, pattern-making requirements, and the level of final machining needed. Once the engineering drawings are approved, we provide a detailed project timeline and send weekly progress photos/videos to keep you updated.
Can you manufacture castings that strictly comply with our local standards (e.g., ASTM, DIN, EN, JIS)?
Yes. We are highly experienced in international standard conversions. Whether your project specifies American standards (ASTM A27, ASTM A148), European standards (EN 10213, DIN GS-20Mn5), or Japanese standards (JIS G5101), our metallurgical engineers will configure the exact chemical composition and heat treatment parameters to meet or exceed those requirements.
Want a Custom Metallurgy & Steel Casting? Talk to Our Engineers.
Submit your 3D/2D engineering drawings (STEP, PDF) today. Our metallurgical engineers will review your specs and provide a comprehensive, transparent quote within 24 hours.
- Engineering reply within 24 hours
- NDA before you send drawings, on request
- ASTM · EN · DIN · JIS standards supported