1CR21AL4 Large Diameter Iron Chromium Aluminum Alloy

The 1CR21AL4 large-diameter iron-chromium-aluminum alloy has a chromium content ranging from 17.0% to 21.0%. In a high-chromium environment, the oxide film formed on the alloy surface is not only of moderate thickness but also possesses extremely high resistivity. This film exhibits a very low ion migration rate at the maximum continuous operating temperature of 1100°C, effectively inhibiting further oxidative degradation of the metal substrate. The processing challenge for large-diameter materials lies in the internal stress during bending. 1Cr21Al4 maintains an elongation rate of over 12%, allowing engineers to process heavy-gauge wires into U-shaped, corrugated, or helical large-diameter coils without frequent intermediate annealing.

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Specification
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Grade		1Cr13Al4	10Cr21Al4	0Cr21Al6	0Cr23Al5	0Cr25Al5	0Cr21Al6Nb	0Cr27Al7Mo2
Main chemical composition (%)	Cr	12.0–15.0	17.0–21.0	19.0–22.0	20.5–23.5	23.0–26.0	21.0–23.0	26.5–27.8
	Al	4.0–6.0	2.0–4.0	5.0–7.0	4.2–5.3	4.5–6.5	5.0–7.0	6.0–7.0
	Fe	Bal	Bal	Bal	Bal	Bal	Bal	Bal
	Re	Opportune	Opportune	Opportune	Opportune	Opportune	Opportune	Opportune
	Mn	≤0.7	≤0.7	≤0.7	≤0.7	≤0.7	≤0.7	≤0.2
							Nb0.5	Mo:1.8–2.2
Max continuous service temp. of element (℃)		950	1100	1300	1250	1300	1350	1400
Melting point (℃)		1450	1500	1500	1500	1500	1510	1520
Density (g/cm³)		7.4	7.35	7.16	7.25	7.1	7.1	7.1
Resistivity (μΩ·m at 20℃)		1.25±0.08	1.23±0.06	1.42±0.07	1.35±0.06	1.45±0.07	1.45±0.07	1.53±0.07
Tensile strength (Mpa)		588–735	637–784	637–784	637–784	637–784	637–784	686–784
Elongation (%)		>16	>12	>12	>12	>12	>12	>10
Bending frequency		>5	>5	>5	>5	>5	>5	>5
Accelerated life test (h/℃)		-	≥80/1250	≥80/1300	≥80/1300	≥80/1300	≥50/1350	≥50/1350
Specific heat (J/g·℃)		0.49	0.49	0.52	0.46	0.494	0.494	0.494
Thermal conductivity (k J/m·h·℃)		52.7	46.9	63.2	60.1	46.1	46.1	45.2
Coefficient of linear expansion (20–1000℃, ×10⁻⁶/℃)		15.4	13.5	14.7	15	16	16	16
Hardness (HB)		200–260	200–260	200–260	200–260	200–260	200–260	200–260
Micro structure		Ferrite F	Ferrite F	Ferrite F	Ferrite F	Ferrite F	Ferrite F	Ferrite F
Magnetic		Yes	Yes	Yes	Yes	Yes	Yes	Yes

Danyang Haiven Electric Heating Alloy Co., Ltd. is located in Lucheng Town, Danyang City, Jiangsu Province, China. The company was established in 2010 based on the original company "Danyang Huakang Electric Heating Alloy Co., Ltd." and has been in operation for over 40 years. Since its expansion, the company's total area has reached 30,000 square meters. The company has production lines for a series of products including FeCrAl, Kanthal, CuNi, NiCr, CuMn, Kangtong, Monel, Incoloy, Hastelloy, etc. We have equipped with advanced equipment and processes, capable of providing a complete product range from raw material melting, steel rolling, stretching, heat treatment to finished products and packaging. Standardization work and strict inspections run through every stage of the product. As Haiven people, we have always adhered to the goal of "building a first-class brand and a first-class enterprise". We uphold the spirit of "quality first, reputation foremost", providing customers with the highest quality products and competitive prices. Welcome new and old customers at home and abroad to visit and patronize. Let us achieve long-term win-win cooperation.