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Chromel - 2.4870 - Nicrosil® tape

Chromel - 2.4870 - Nicrosil® tape

AvekGlob company sells a chromium ribbon at reasonable prices from the manufacturer (other names for the alloy are Nicrosil®, alloy 2.4870) in a wide range of thickness and width. The supplier ensures the timely delivery of rolled products to any address specified by the consumer.

Composition and application

Chromel alloy (foreign analogs — Nicrosil®, 2.4870) refers to the number of alloys intended for the manufacture of flat thermocouples, extension cords and compensating conductors / connections. When heated on pokeryhnosti formed oxide film, which does not affect the operational properties of thermocouples, so the tape from chromel can be used in corrosive atmospheres.

The ribbon from the alloy in question is used in oxidizing, inert or dry reducing atmospheres. The effect of vacuum is limited to short periods of time. The surface of a flat thermocouple must be protected from a sulphurous and slightly oxidizing atmosphere. The alloy is characterized by reliability and accuracy at high temperatures: long — up to 1200 0 С, for a short time — up to 1300 0 С. The lower limit of application is — 40 0 С.

Specifications of chromel (Nicrosil®, alloy 2.4870) meet the requirements and norms of foreign standards ASTM E 230 and ANSI MC 96.1 and domestic GOST 5189−75. The alloy’s chemical composition is as follows:

Nickel — 89… 91%;

Chromium — 8,7… 10,0%;

Iron — no more than 0,3%;

Aluminum — no more than 0,15%;

Silicon — no more than 0,4%;

Manganese — no more than 0,3%.

The total amount of impurities should not exceed 1.4%, in nickel it can contain up to 0.6… 1.2% cobalt.

Buy at an economical price tape made of alloy chromel (Nicrosil®, alloy 2.4870), offers the company AvekGlob. The Supplier organizes prompt dispatch of the rental to any point set by the client.

Properties

Basic physical characteristics of the alloy:

Density, kg / m 3 — 8720;

Melting point, 0 С — 1450… 1500;

Coefficient of thermal expansion, in the temperature range 20… 600 0 С, μm / deg — 15,6;

The coefficient of thermal conductivity, in the temperature range 20… 100 0 С W / mgrad — 19,7;

Specific electrical resistance, Ohmm 2 / m — 0.68.

Basic mechanical characteristics of the alloy:

The limit of time resistance, MPa — 490;

Yield strength, MPa —

Relative elongation at tension,% — 15;

Hardness in Brinell, HB, not more than — 210.

Technological features: the temperature range of the processes of hot deformation is 1120… 1200 0 С. When heated above 1000 0 С, a film of greenish color is formed on the surface of the tape, which is not a defective feature.

Company Avecglob proposes to purchase at a reasonable price from the manufacturer a ribbon from the alloy of nickel-chromium alloy chromel (Nicrosil®, alloy 2.4870). The supplier makes immediate delivery of products to any point. stipulated by the customer.