FH® Welded Fan Blades for High-Temperature Furnace Fans – 1.4848, Anti-Creep, Dynamic Balancing, ISO 9001 Suppliers, Wholesale Factory - Wuxi Junteng Fanghu Alloy Technology Co., Ltd.

FH® Welded Fan Blades for High-Temperature Furnace Fans – 1.4848, Anti-Creep, Dynamic Balancing, ISO 9001

Brand: FH®

Certification: ISO9001, ISO14001

Material: Heat-resistant Steel

Material Grade: HK

Size: Customized According to your Drawings

Operating Temperature: 1100℃

MOQ: 2 Pieces

FH® Welded Fan Blades & Impellers | High-Temperature Furnace Circulation

Key Benefits

Precision Laser Welding
Hybrid laser + TIG welding process – minimal heat input, full penetration, and spatter-free seams that resist thermal fatigue cracking.
High-Temperature Strength
Fabricated from heat-resistant alloys – maintains blade geometry and structural integrity at furnace operating temperatures up to 1150°C.
Dynamic Balancing
Each impeller is dynamically balanced before shipment (ISO 1940 G6.3 or better) – reduces vibration, extends bearing life, and ensures quiet operation.
Custom Blade Profiles
Radial, backward-curved, forward-curved, or axial flow – designed for your specific airflow and pressure requirements.
Rugged Construction
Reinforced blade-to-hub attachments and stress-relieved welds – withstands thermal cycling and high centrifugal forces.

Technical Specifications

Parameter	Value
Materials	310S, 1.4828, 1.4849, Inconel 600/625, Hastelloy
Max. continuous temp.	650°C – 1150°C (depending on material)
Blade types	Radial, backward-curved, forward-curved, axial
Hub types	Keyed, tapered, split, or custom bore
Diameter range	200 mm – 1500 mm
Max. tip speed	Up to 100 m/s (design dependent)
Balancing grade	ISO 1940 G6.3 standard (G2.5 available)
Welding standard	EN ISO 5817 / AWS D1.1
Surface finish As-welded / shot-blasted / high-temp coating

Why Choose FH® Welded Fan Blades?
1. The Critical Role of Circulation Fans
In heat treatment furnaces, circulation fans are the heart of temperature uniformity. Poorly fabricated fan blades:

Create vibration that damages bearings and motor mounts
Generate uneven airflow – temperature variations across the load
Crack at welds – catastrophic failure possible
Deform at temperature – reduced efficiency and increased energy consumption

FH® welded impellers solve these problems.

2. Material Selection Guide

Material	Max Temp	Best For
310S	950°C	Tempering, low-temp carburizing, general circulation
1.4828	1000°C	Higher temperature annealing, good oxidation resistance
1.4849	1050°C	High-temp carburizing, heavy-duty circulation
Inconel 600	1100°C	Severe thermal cycling, corrosive atmospheres
Inconel 625	1150°C	Extreme temperatures, high-strength requirements

3. Manufacturing Process

Step	Process
1	Blade profile laser-cut from certified plate
2	Hub machined to customer shaft specification
3	Blades positioned in precision welding fixture
4	Laser/TIG welding – minimal distortion, no spatter
5	Post-weld stress relief (required for high-temp service)
6	Rough balancing – material addition/removal
7	Dynamic balancing – ISO 1940 G6.3 minimum
8	Final dimensional inspection and surface finishing

Blade Types Available

Type	Airflow Pattern	Best For
Radial (straight)	High pressure, moderate flow	High-static pressure applications, dense loads
Backward-curved	High flow, good efficiency	General circulation, energy efficiency
Forward-curved	High flow at low speed	Low-speed, high-volume applications
Axial (propeller)	High flow, low pressure	Through-flow furnaces, cooling fans

Applications
Furnace Types:

Box furnace roof circulation fans
Pit furnace recirculation fans
Car bottom furnace fans
Bell furnace circulation
Continuous furnace cross-flow fans
Tempering furnace circulation
Annealing furnace fans
Sintering furnace fans
Drying oven circulation

Industries:

Heat treatment shops
Automotive parts manufacturing
Aerospace heat treating
Forging and foundry
Steel and aluminum processing
Ceramic and glass kilns
Chemical processing furnaces

Material Grade Table:

Heat-resistant Steel
/	GB	DIN	ASTM	JIS	Chemical Composition (%)								Maximum Operation Temperature
/	GB	DIN	ASTM	JIS	C	Si	Mn	Cr	Ni	Nb/Cb	Mo	Other	Maximum Operation Temperature
1	ZG40Cr27Ni4	1.4823	HD	SCH11	0.30 - 0.50	≤2.00	≤1.00	24.00 - 28.00	4.00 - 6.00	-	≤0.50	-	1050℃
2	ZG40Cr22Ni10	1.4826	HF	SCH12	0.30 - 0.50	1.00 - 2.50	≤2.00	19.00 - 23.00	8.00 - 12.00	-	≤0.50	-	950℃
3	ZG30Cr28Ni10	-	HE	SCH17	0.20 - 0.50	≤2.00	≤2.00	26.00 - 30.00	8.00 - 11.00	-	-	-	1050℃
4	ZG40Cr25Ni12	1.4837	HH	SCH13	0.30 - 0.50	1.00 - 2.50	≤2.00	24.00 - 27.00	11.00 - 14.00	-	≤0.50	-	1050℃
5	ZG30Cr28Ni16	-	HI	SCH18	0.20 - 0.50	≤2.00	≤2.00	26.00 - 30.00	14.00 - 18.00	-	-	-	1100℃
6	ZG40Cr25Ni20Si2	1.4848	HK	SCH21	0.30 - 0.50	≤1.75	≤1.50	23.00 - 27.00	19.00 - 22.00	-	≤0.50	-	1100℃
7	ZG30Cr20Ni25	-	HN	SCH19	0.20 - 0.50	≤2.00	≤2.00	19.00 - 23.00	23.00 - 27.00	-	-	-	1100℃
8	ZG40Cr19Ni39	1.4865	HU	SCH20	0.35 - 0.75	≤2.50	≤2.00	17.00 - 21.00	37.00 - 41.00	-	-	-	1020℃
9	ZG40Cr15Ni35	1.4806	HT	SCH15	0.35 - 0.70	≤2.00	≤2.00	15.00 - 19.00	33.00 - 37.00	-	≤0.50	-	1000℃
10	ZG40Cr25Ni35Nb	1.4852	HPCb	SCH24Nb	0.30 - 0.50	≤2.00	≤2.00	24.00 - 28.00	33.00 - 37.00	0.80 - 1.80	≤0.50	-	1100℃
11	ZG40Cr19Ni39Nb	1.4849	-	-	0.30 - 0.50	1.00 - 2.50	≤2.00	18.00 - 21.00	36.00 - 39.00	1.20- 1.80	≤0.50	-	1100℃
12	ZG40Cr24Ni24Nb	1.4855	-	-	0.30 - 0.50	1.00 - 2.50	≤2.00	23.00 - 25.00	23.00 - 25.00	0.80 - 1.80	≤0.50	-	1050℃
13	ZG40Cr25Ni35	1.4857	HP	SCH24	0.35 - 0.50	1.00 - 2.50	≤2.00	24.00 - 28.00	33.00 - 37.00	-	≤0.50	-	1100℃
14	ZG1Cr20Ni32Nb	1.4859	-	-	0.06 - 0.15	0.50 - 1.50	≤2.00	19.00 - 21.00	31.00 - 33.00	0.50 - 1.50	≤0.50	-	1050℃
15	ZG45Cr12Ni60	-	HW	-	0.35 - 0.75	≤2.00	≤2.00	10.00 - 14.00	58.00 - 62.00	-	-	-	1100℃
16	ZG45Cr18Ni66	-	HX	-	0.35 - 0.75	≤2.00	≤2.00	15.00 - 19.00	64.00 - 68.00	-	-	-	1100℃
17	ZG1Cr28Co50	2.4778	-	-	0.05 - 0.25	0.50 - 1.00	≤1.50	27.00 - 30.00	≤1.00	≤0.50	≤0.50	Co:48.0 - 52.0	1200℃
18	ZG30Cr28Co50Nb	2.4779	-	-	0.25 - 0.35	0.50 - 1.50	0.50 - 1.50	27.00 - 29.00	-	1.50 - 2.50	≤0.50	Co:48.0 - 52.0	1200℃
19	ZG40Cr28Ni48W5	2.4879	-	SCH42	0.35 - 0.55	1.00 - 2.00	≤1.50	27.00 - 30.00	47.00 - 50.00	-	≤0.50	W:4.0 - 5.5	1200℃

Genuine Photos of FH® Welded Fan Blades

Ordering Process
1. Provide:

Existing fan drawing or dimensions (diameter, shaft size, blade type)
Operating temperature and atmosphere
Motor power and RPM
Desired material grade (or let us recommend)
Balancing grade required (G6.3 standard, G2.5 optional)

2. FH® proposes:

Material recommendation based on your conditions
Blade profile optimization for efficiency
CAD drawing for approval
Price and lead time

3. Production: 10–25 working days

4. Delivery includes:

Dynamic balancing report
Material test certificate (MTC)
Dimensional inspection report
Installation and care guide

FAQ:

Q1: How long will FH® welded fan blades last?
A: Service life depends on temperature and atmosphere. Typical expectations: 310S at ≤700°C: 5–10 years; 1.4849 at 950°C: 2–5 years; Inconel at 1050°C+: 1–3 years. Regular inspection every 6–12 months is recommended.

Q2: What material do you recommend for my furnace?
A: For ≤700°C tempering: 310S. For 950°C carburizing: 1.4849. For >1000°C or aggressive atmospheres: Inconel 600/625. FH® provides free material recommendations based on your specific conditions.

Q3: Why is dynamic balancing important?
A: Unbalanced fan blades cause bearing wear, furnace vibration, noise, reduced efficiency, and risk of cracking. FH® balances every set to ISO 1940 G6.3 minimum (G2.5 available) and includes a balancing report.

Q4: Can you repair or reverse-engineer my existing fan blades?
A: Yes. For repair: we can re-weld cracks or replace damaged blades. For reverse-engineering: send us your worn blades or drawings – we will measure, improve material if possible, and produce a direct replacement.

Q5: What is your warranty?
A: 12 months against manufacturing defects (weld cracks, material flaws, balancing issues). Normal wear, thermal fatigue, and corrosion are not covered – but FH® will recommend the right material for your conditions to maximize life.