What This Part Is And Why It Is Made This Way
Biomass fuel varies from batch to batch, and with it the ash chemistry that attacks the furnace internals. That variability is why biomass castings are specified in heat resistant alloys rather than in ordinary heat treated steel.
Furnace bodies and internals are cast in 1.4777, 1.4776, 1.4823 and 1.4855 using lost wax, lost foam or shell moulding.
What You Get From This Route
Stable production base supports repeat supply of low annual volumes.
Heat resistant grades matched to biomass duty rather than generic furnace use.
Standard delivery supported by quotation against real material consumption.
Application Scenarios
- Biomass boiler combustion chambers
- Pellet boiler internals
- Agricultural residue combustion equipment
- Small scale thermal plant furnaces
Who It Is For
- Biomass boiler manufacturers
- Energy plants running biomass fuel
- Service companies maintaining biomass installations
Technical Features
- Heat resistant alloys 1.4777 / 1.4776 / 1.4823 / 1.4855
- Lost wax, lost foam and shell moulding routes
- Stable production supply for standard delivery
- Quotation based on actual material consumption
What Buyers Run Into Without This Specification
- Fuel changes and castings that lasted a season now fail in months.
- Volumes are too small for a foundry to take seriously.
- Thermal cycling cracks parts chosen only on strength.
Published Material Weight And Process Data
Figures below are the published capability for high alloy parts. Part specific values — tolerance on individual features, finish, packing — are confirmed at drawing review and marked TBC until then.
| Food Machinery Material | 1.4308 / 1.4309 / 1.4340 |
|---|---|
| Food Machinery Weight | 9 kg - 800 kg |
| Grate Bar Material | 1.4777 / 1.4776 / 1.4823 / 1.4743 / LH26 / EN-GJL-200 + 3%Cr |
| Grate Bar Weight | Typical products 2 kg - 50 kg; some grate bars and liners around 10 kg - 50 kg |
| Biomass Material | 1.4777 / 1.4776 / 1.4823 / 1.4855 |
| Working Temperature | Typical maximum around 1050 °C - 1150 °C depending on material and duty |
| Process | Shell moulding, lost wax and lost foam casting, plus CNC machining |
| Tolerance | Shell moulding normally CT9-10; lost wax normally CT8; surface roughness about Ra 12.5 |
| Part Specific Tolerance | TBC — confirmed against the customer drawing |
| Minimum Order Quantity | TBC — depends on the process route selected |
| Lead Time | TBC — confirmed with the production base at quotation |
How The Part Is Made And Checked
- Inspection — Dimensions, flatness, assembly clearance, 3D scanning, RT, PT, hardness, chemical composition and tensile testing.
- Material Control — Chemical analysis on each melt, sampling from the product body and third party testing for special elements.
- Heat Treatment — Rotors are annealed to 20-35 HRC before machining, then quenched at about 1020 °C to 59-63 HRC.
Quality management is based on ISO 9001 and covers supplier management, raw material inspection, production process control and final inspection. Inspection results are archived and traceable.
Options And Alternatives
Parts are produced to the customer drawing rather than to a fixed catalogue item, so material grade, machining scope, surface treatment and packing are all specified per order. Machining, dimensional control, surface treatment and necessary pre-assembly can be added to the same supply route.
Where another process family would suit the part better — for example a forging in place of a casting for a shock loaded connector — that comparison is raised during drawing review rather than after tooling is committed.
How To Specify This Part
Describe the fuel as precisely as you can — wood chip, pellet, straw or mixed residue — along with the working temperature. Ash chemistry differs sharply between these fuels and it changes which heat resistant grade is the sensible choice.
- Send the drawing with material, quantity, quality standard and target delivery date.
- State the inspection class and the zones it applies to, rather than a general note.
- Confirm the packing requirement and the lifting equipment available at the destination.
Related Guides
Other Parts In This Range
Stainless Steel Vessel Components
Cast and machined stainless vessel bodies
View specifications
Rotating and Drive Components
Stainless shafts and drive parts for hygienic equipment
View specifications
Assembled Machinery Components
Multi part stainless assemblies
View specifications
Precision Machined Structural Parts
Close tolerance stainless structures
View specificationsBiomass Furnace Castings — Frequently Asked Questions
Can you supply small annual quantities?
Yes. Supply is based on a stable production base that supports standard delivery for this product family, including repeat low volume requirements.
How is the price calculated?
Quotations for heat resistant biomass castings are based on actual material consumption, in line with the requirements of heat resistant castings.
What do you need to prepare a quotation?
Drawings, material, quantity, quality standard and target delivery date.
Which inspection is included?
The inspection scope is agreed during drawing review. Rotors are annealed to 20-35 HRC before machining, then quenched at about 1020 °C to 59-63 HRC.
Get A Quotation For Biomass Furnace Castings
Send the drawing and the application. We will confirm the process route, the production base and the inspection scope before quoting.