What is the Chinese equivalent of NiCr 40/20 or Ni40Cr20?

GB Cr20Ni35. NiCr 40/20 has Ni ≥37.0%, Cr 18–22%, Si 1.8–3.0% and resistivity ≈1.05 μΩ·m; GB Cr20Ni35 has Ni 34.0–37.0%, Cr 18.0–21.0%, Si 1.00–3.00% and resistivity 1.04 μΩ·m. The two overlap across the composition range.

Is there a grade called Cr20Ni40 in the Chinese standard?

No. GB/T 1234 does not define Cr20Ni40. Some Chinese suppliers use it as a commercial name, but the standardised grade is Cr20Ni35.

Does NiCr 40/20 have an ASTM or DIN number?

No. It has no ASTM, UNS, Werkstoff or DIN designation — it is an industry trade grade.

Can NiCr 40/20 be used in a sulphur-bearing atmosphere?

No. All nickel-chromium grades are unsuitable in sulphur atmospheres. Use FeCrAl instead.

Home › Products › FeCrAl Heating Wire & Strip (Iron-Chromium-Aluminium)

FeCrAl Heating Wire & Strip (Iron-Chromium-Aluminium)

Short answer: we produce FeCrAl heating wire and strip in 1Cr13Al4, 0Cr23Al5, 0Cr25Al5, 0Cr21Al6Nb and 0Cr27Al7Mo2, covering 950 °C to 1400 °C, in wire from φ0.03 mm and strip from 0.05 mm.

1. FeCrAl or NiCr — the one-minute decision

If your situation is…	Use	Why
Above 1250 °C	FeCrAl	NiCr tops out around 1250 °C; 0Cr21Al6Nb reaches 1350 °C, 0Cr27Al7Mo2 reaches 1400 °C
Sulphur in the atmosphere or the charge	FeCrAl	NiCr is destroyed by sulphur; FeCrAl is not
Frequent thermal cycling, needs ductility	NiCr	NiCr stays ductile; FeCrAl becomes brittle with age
Element has to be bent or re-bent at room temperature	NiCr	FeCrAl is brittle cold; it must be formed warm
Cost per kilogram matters more than element life	FeCrAl	No nickel content
Long element, wide span, sagging is a risk	FeCrAl with Nb	Niobium pins the grain boundaries and resists creep

2. Grades

Grade	Cr %	Al %	ρ20 (μΩ·m)	Max service temp.	Positioning
1Cr13Al4	12-15	3.5-4.5	1.25 ±0.05	950 °C / 1742 °F	Entry grade, low temperature
0Cr23Al5	20-23	4.5-6.0	1.35 ±0.05	1250 °C / 2282 °F	Workhorse grade
0Cr25Al5	23-26	4.5-6.5	1.40 ±0.05	1300 °C / 2372 °F	Most common high-temperature grade
0Cr21Al6Nb	20-22	5.0-7.0 + Nb	1.45 ±0.05	1350 °C / 2462 °F	Niobium-bearing, resists sag
0Cr27Al7Mo2	26-28	6.0-7.0 + Mo	1.53 ±0.05	1400 °C / 2552 °F	Top of the range

3. Weight per metre

Form	Weight per metre (0Cr25Al5)
Wire φ1.0 mm	5.23 g/m
Wire φ3.0 mm	47.1 g/m
Strip 1.0 × 20 mm	100.3 g/m
Strip 3.0 × 20 mm	300.9 g/m

Basis: density 7.1 g/cm³ for 0Cr25Al5. FeCrAl is markedly lighter than NiCr for the same volume — worth remembering when the element's own weight is what makes it sag.

4. Forming FeCrAl — read this before you bend anything

FeCrAl is brittle at room temperature. This is not a material defect.
Every FeCrAl grade is brittle cold. Warm it to 200-250 °C before bending, keep the inside bend radius at 2.5 × thickness or more, and never re-bend a used element. A used FeCrAl element that has been through a heating cycle is grain-coarsened and will snap — if you must remove it, do it while it is still warm.

5. Please confirm these 4 points before ordering

Working temperature and temperature range — a furnace that runs at 1250 °C needs a different grade from one that occasionally touches it.
Atmosphere — this is where FeCrAl earns its place. Sulphur is fine; chlorine is not, for any grade.
Span between supports — over 400 mm and we will quote 0Cr21Al6Nb rather than 0Cr25Al5.
Form and bend radius — if we pre-form the element we need the drawing with bend radii marked.

Need a quotation?

Send grade, form, size with tolerance and quantity — we reply within one working day (GMT+8).

WhatsApp +86 136 6174 5686 Enquiry form

About Shanghai Xinxiang Alloy

Shanghai Xinxiang Alloy Materials Co., Ltd. was founded in 2014 and is a source manufacturer of electric heating alloys and nickel-based precision alloys. Production base in Taixing, Jiangsu, approximately 20,000 m², 48+ pieces of melting, forging, rolling, drawing, heat-treatment and testing equipment, 200+ staff, annual capacity about 7,500 tonnes.

Contact: Tel +86 136 6174 5686 / +86 21 6911 6339 | Email shryhjcl@126.com

Grade cross-references are commercial equivalents, not a guarantee of interchangeability. Final acceptance is subject to the composition sheet agreed at order.