types of CNC machining
1.4776 cast metal bar for boilers, also marked as GX40CrSi28 per EN 10295 standard, is the most widely used austenitic heat resistant cast alloy blank for industrial boiler high-temperature components. As a physical factory with more than 10 years focused on heat resistant casting steel production, Juhe Yulong Special Steel Co., Ltd. provides standard 1.4776 boiler cast bars and fully personalized custom cast alloy bars for all types of boiler thermal equipment.
Different from middlemen who only stock finished 1.4776 cast bars, our core competitiveness lies in independent multi-alloy formula customization and full-category casting product customization. Apart from standard 1.4776 cast metal bar for boiler grates, furnace supports, combustion chamber brackets, we can adjust chemical composition, casting shape, dimensional tolerance, heat treatment state and surface finish according to customers' boiler operating temperature, thermal cycle frequency, flue gas corrosion environment and load bearing requirements.
All 1.4776 cast boiler bars and custom heat resistant cast alloys strictly follow DIN, EN, ASTM, GB industrial standards. Every batch of boiler cast metal bar is equipped with full spectral composition test reports, high-temperature tensile test data, hardness inspection records and metallographic analysis certificates, all test results are traceable and verifiable, no exaggerated virtual high-temperature performance.
Professional Introduction to DIN 1.4776 (GX40CrSi28) Cast Metal Bar for Boilers
DIN 1.4776 (GX40CrSi28) belongs to high chromium silicon heat resistant cast steel specified under EN 10295 heat resistant casting standard, specially developed for long-term service under 950°C continuous high-temperature boiler working conditions.
Fixed chemical composition basis (ladle spectral inspection standard):
Carbon: 0.30–0.50%, Silicon: 1.0–2.5%, Chromium: 26–30%, Manganese ≤0.8%, Nickel ≤1.0%
Verified mechanical performance (factory lab test data, no false propaganda):
- Tensile strength: 520–670 MPa
- Yield strength ≥205 MPa
- Elongation ≥40%
- Stable hardness range HB 220–320 after stress relief annealing
Core boiler application advantages supported by material characteristics
Excellent high-temperature oxidation resistance
High Cr-Si alloy layer forms dense anti-oxidation film under boiler flue gas, effectively preventing bar surface peeling and oxidation loss during long-term boiler start-stop thermal cycling
Strong anti-creep performance
Maintains stable structural strength under long-term high-temperature static load, avoids bending, deformation and fracture of boiler grate bars and support frames
Good flue gas corrosion resistance
Resists sulfur-containing flue gas, acid flue gas corrosion produced by coal-fired, biomass-fired, waste incineration boilers
Superior casting formability
Suitable for integral casting of long strip bars, special-shaped brackets, curved furnace supports, reduces secondary welding failure risk of boiler parts
Full Customizable Product Forms of 1.4776 Boiler Cast Metal Bar
We realize all-round shape customization based on 1.4776 heat resistant cast alloy, all specifications can be adjusted according to customer drawings or samples, no fixed mold restriction for small batch custom orders:
Straight cast bar
Custom round bar, square bar, flat bar, rectangular bar, hexagonal bar; customizable diameter, cross-section width, total length, two-end chamfer, flat cutting
01
Curved boiler cast bar
Custom arc grate bar, U-shaped furnace support bar, bent heat resistant casting strip for boiler superheater protection
02
Special-shaped cast blanks
Custom irregular bracket castings, multi-hole fixing cast bar, split boiler combustion frame castings integrated with bar structure
03
Deep machined finished cast parts
CNC drilling, tapping, surface grinding, polishing for 1.4776 cast bars, finished boiler assembly components directly available for installation
04
Composite casting assemblies
Integral casting of 1.4776 cast bar + alloy base, one-piece forming for boiler internal support system to reduce customer secondary processing cost
05
Multi-Material Customization Service
While 1.4776 cast metal bar is our core boiler casting product, our independent smelting & casting workshop supports full multi-material heat resistant alloy customization for all boiler high-temperature parts, covering standard grades and exclusive custom alloy formula development:
Conventional customizable boiler heat resistant casting steel grades:
- 1.4776 (GX40CrSi28): Standard boiler grate bar, furnace support bar material
- 1.4777 (GX40CrSi13): Medium-temperature boiler castings below 800°C
- 1.4848, 1.4855, 1.4823: High-nickel high-temperature cast alloys for ultra-high temperature industrial boilers
- 310S, 309S cast stainless steel: Corrosion-resistant boiler flue pipe brackets
- Cr-Mo cast alloy steel (15CrMo, 12Cr1MoV): Medium-temperature pressure boiler cast components
- High-temperature nickel-based casting alloys (Inconel series): Special waste incineration boiler, chemical thermal furnace cast bars
Two flexible multi-material customization modes for global buyers:
- Standard grade customization: Select above international standard heat resistant casting steel, only customize casting shape, size, heat treatment and machining based on existing alloy composition
- Exclusive custom alloy development: Our metallurgical engineers adjust Cr, Ni, Si, Mo, V alloy element ratio according to customer's special boiler working conditions (ultra-high temperature, strong acid flue gas, heavy impact load), develop exclusive custom boiler cast alloy material, provide full composition test report for new alloy formula
All custom multi-material boiler cast bars pass full spectral inspection before delivery, completely avoiding material mismatch caused by unknown boiler operating environment.
Juhe Yulong Special Steel Co., Ltd. is a professional heat resistant casting & special steel manufacturing factory with more than 10 years independent production experience. We are not an intermediate trading company; all casting workshops, heat treatment production lines, precision machining equipment and testing laboratories are self-owned, forming obvious competitive advantages compared with small casting workshops and steel traders:
01
Over 10 years professional boiler heat resistant casting production experience
Our core technical team has long-term metallurgical casting experience, familiar with boiler material standards of European, American, Southeast Asian, Middle Eastern thermal power markets. We can quickly judge matching alloy schemes according to different boiler fuel types (coal, biomass, gas, waste incineration), avoid premature failure of cast bars caused by improper material selection
02
Complete independent supporting production workshops
Equipped with alloy smelting workshop, sand casting workshop, investment casting workshop, constant temperature heat treatment workshop, CNC precision machining workshop and independent physical & chemical inspection lab. All production links are self-operated without outsourcing processing, fully control customization cycle, casting quality and exclusive alloy formula confidentiality
03
Flexible Custom Order Policy (Small Batch Samples & Mass Production Supported)
Most large foundries only accept bulk orders measured in tons. Our factory provides small-batch sample customization services for new boiler equipment clients, with samples delivered within 15 working days. Once customers confirm the samples, we can swiftly shift to stable mass production. Our sufficient monthly casting capacity is capable of meeting the long-term bulk procurement demands of power station boiler manufacturers.
04
Free one-to-one professional technical customization support
Provide exclusive metallurgical engineer consultation service, free boiler material selection guidance, drawing optimization suggestion, post-installation maintenance guide for 1.4776 cast bars. For customers without clear material parameter requirements, we recommend cost-effective custom cast alloy solutions combined with actual boiler operating conditions
Application Scenarios of 1.4776 Cast Metal Bars & Custom Heat-Resistant Alloys for Boilers
Our standard 1.4776 cast metal bar for boilers and multi-material custom heat resistant casting bars are widely purchased by global thermal equipment manufacturers, covering all mainstream boiler and high-temperature furnace industries:
- Industrial steam boiler manufacturers: Biomass boiler, coal-fired boiler, gas boiler grate bar, furnace support frame
- Thermal power station boiler supporting factories: Superheater protection cast bars, boiler combustion chamber fixed castings
- Waste incineration furnace & garbage thermal treatment equipment factories: High-temperature anti-corrosion cast alloy bars
- Chemical thermal furnace, oil refining heating furnace manufacturers: High-temperature furnace bracket cast blanks
- New energy biomass pellet boiler, heat recovery boiler component suppliers
- Metallurgical sintering furnace, heat treatment furnace, kiln equipment casting parts
Whether you need standard stock 1.4776 cast metal bar for boiler grate replacement, or non-standard fully custom heat resistant cast bars for new boiler R&D and transformation, our factory can provide targeted multi-material full-range customization schemes matching your equipment temperature, flue gas corrosion and load requirements.
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