CrMnN Furnace Base Plate, with the Chinese standard grade ZG30Cr18Mn12Si2N (GB/T 8492), is an independently developed nickel-saving austenitic heat-resistant cast steel in China. Specifically designed for long-term high-temperature (950–1050℃), heavy-load, and frequent start-stop working conditions, it uses manganese and nitrogen to replace expensive nickel, achieving performance comparable to high-nickel alloys (310S/HP40) while reducing costs by 30–40%. It is the most cost-effective and reliable solution for trolley furnaces, box furnaces, walking beam furnaces, and various heat treatment equipment.
Material Composition (GB/T 8492, wt%)
C: 0.26–0.36 (Carbide strengthening, balancing strength and toughness)
Cr: 17–19 (Forms dense Cr₂O₃ film, core of oxidation resistance)
Mn: 11–13 (Stabilizes austenite, improves toughness, replaces nickel)
Si: 1.5–2.5 (Enhances oxidation resistance and carburization resistance)
N: 0.2–0.3 (Solid solution strengthening, creep resistance, grain refinement)
P/S: ≤0.04 (Low impurities, improving high-temperature stability)
International Equivalent: No exact equivalent grade; for export, it can be marked as "Equivalent to DIN G-X30CrMnSiN18-12-2 / Custom ASTM A743" with chemical composition and mechanical property reports.
Core Advantages
✅ High Temperature Resistance, Creep Resistance & Long-Term Non-Deformation
Long-term service temperature: 950–1050℃; short-term peak temperature: 1200℃. Creep rupture strength at 1000℃ ≥ 45MPa/1000h, excellent creep resistance. Thermal expansion coefficient is only 14.5×10⁻⁶/℃, minimal thermal deformation. Solves industry pain point: ordinary cast iron/carbon steel deforms in 6 months, while CrMnN can be used for 3–5 years.
✅ Strong Oxidation Resistance, No Scaling & No Slagging
Oxidation loss at 1000℃ < 0.1%/1000h. Composite oxide film of Cr₂O₃+SiO₂, resistant to oxidation and sulfur corrosion. Avoids oxide scale falling off to contaminate workpieces, improving product cleanliness.
✅ Thermal Shock Resistance, Fatigue Resistance & No Cracking
Not easy to crack under repeated rapid cooling and heating (Δt > 800℃). Integral casting + reinforcing rib design, no welding seams or splicing, eliminating welding cracks. Thermal fatigue life is 2–3 times higher than traditional materials.
✅ High Hardness, Wear Resistance & Strong Load-Bearing Capacity
Hardness up to HV500+ (≈HRC50), wear resistance better than high manganese steel. High-temperature load-bearing capacity: 6–10 t/㎡, meeting the needs of heavy workpiece heat treatment.
✅ Nickel-Saving & Cost-Effective
Nickel-free design, cost 30–40% lower than 310S/HP40. Long service life, low maintenance, and low shutdown loss, achieving the optimal total life cycle cost.
Typical Application Scenarios
Suitable Furnace Types: Trolley heat treatment furnaces, box resistance furnaces, walking beam furnaces, heating furnaces, annealing furnaces, quenching furnaces.
Applicable Industries: Metallurgy, auto parts, machinery manufacturing, forging, heat treatment plants.
Working Condition Matching: Temperature: 850–1100℃; Atmosphere: Air, oxidizing, neutral, weakly reducing; Load: Heavy load, frequent in and out, periodic heating and cooling.
Manufacturing Process (Determines Service Life)
High-purity batching + precision smelting (1580–1620℃)
Lost foam integral casting (one-piece molding, no welding seams, precise size)
Solution heat treatment (key: stabilize structure, eliminate stress, improve toughness)
Finishing + machining + non-destructive testing (UT/MT)
Dimensional inspection + material report + factory certificate
Structural Features: Thick plate + reinforcing ribs integral casting; available in flat plate, strip, grid, porous breathable types; fully customizable according to drawings.
Specifications & Customization
Thickness: 20–50 mm; Width: 1000–1250 mm; Length: 6000–6500 mm; Structure: Flat plate, reinforcing ribs, porous, special-shaped; Delivery: Customized according to drawings, fast delivery, 12-month warranty.
Export Service: Provide material certificate, mechanical property report, non-destructive testing report, English COC, supporting global delivery.
Why Choose Our CrMnN Furnace Base Plate?
✔ Original Factory Casting: Full-process control, no middlemen
✔ Stable Material: Strictly comply with GB/T 8492, uniform composition and consistent performance
✔ Precision Process: Lost foam + solution heat treatment, service life 30%+ higher than ordinary factories
✔ Non-Standard Customization: Any size/structure can be produced
✔ Export Experience: Products exported to the EU, Southeast Asia, the Middle East, Africa, with good reputation
✔ Technical Support: Free selection advice and working condition adaptation solutions
Conclusion
CrMnN Furnace Base Plate (ZG30Cr18Mn12Si2N) is the ideal load-bearing solution for high-temperature heat treatment furnaces. It features long-term stability at 1050℃, deformation resistance, cracking resistance, oxidation resistance, cost saving of 30–40% by replacing high-nickel alloys, integral casting with 3–5 years service life, and global standards for export. Stop production due to frequent furnace base plate replacement! Choose CrMnN for one-time investment, long-term stability, cost reduction and efficiency improvement.
Contact Us
📧 Email: Hongsheng@hsmachineryparts.com
🌐 Website:https://www.hsmachineryparts.com/
📍 Address: Qingyun, Shandong, China
