GOST 492-73

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  ГОСТ 492-73

GOST 492−73 Nickel, alloys Nickel and copper-Nickel, processed by pressure. Stamps (with Amendments No. 1, 2, 3, 4)

GOST 492−73

Group B51

STATE STANDARD OF THE USSR

NICKEL, ALLOYS NICKEL AND COPPER-NICKEL
PRESSURE TREATED

Brand

Nickel, nickel and copper-nickel alloys treated under pressure. Grades

Date of introduction 1975−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

DEVELOPERS

L. P. Seleznev, candidate.tech.Sciences; A. A. Bulk, I. A. Vorobyev

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 28.05.73 N 1330

3. The standard complies with international standards: ISO 429−83 in terms of alloys MN25, Mnzhmc10−1-1, Mnzhmc30−1-1 and ISO 430−83 in terms of grades MNC18−20, MNC18−27, MNC15−20, MNC12−24

4. REPLACE GOST 492−52

5. Limitation of actions taken by the decision of the Interstate Council for standardization, Metrology and certification (I & C 5−93)

6. REISSUE with Amendments No. 1, 2, 3, 4, approved in November 1976, February 1979, August 1981, may 1988 (IUS 11−76, 4−79, 11−81, 8−88)


1. This standard covers Nickel, Nickel and copper-Nickel alloys treated by pressure applied to various products in mechanical engineering, vehicle building, instrument making and other industries.

The standard complies with international standards ISO 429−83 in terms of alloys MN25, Mnzhmc10−1-1, Mnzhmc30−1-1 and ISO 430−83 in terms of grades MNC18−20, MNC18−27, MNC15−20, MNC12−24.

(Changed edition, Rev. N 2, 3, 4).

2. Brand chemical composition and the approximate assignment of Nickel shall be as specified in table.1, Nickel alloys — in table.2 and copper-Nickel alloys in the table.3.

Table 1

Extension table 1

Notes:

1. By agreement between manufacturer and consumer in the Nickel marks NP2 permitted zinc content of up to 0.02%. At the request of the consumer in the brand NP1 Nickel silicon content should be not more than 0,006%.

2. Mass fraction of cobalt in the Nickel marks NP2 should be no more than 0.20%, and Nickel is the brand NP4 to 0.60% Nickel brand NPA1 — 0,15%, Nickel brand NPAN to 0.50%, Nickel brand NPA2 — 0,70%.

Table 2

Extension table 2

Notes:

1. By agreement with the consumer allowed to Marche Nmc2,5 the content of iron not more than 0.4%, copper not more than 0.20%, sulphur less than 0.015% carbon and not more than 0.10%; in the Marche Nmc5 — content of copper not more than 0.20%, sulphur less than 0.015% carbon and not more than 0.15%.

2. The asterisk indicates the alloys used in legal relations on cooperation.

3. Mass fraction of cobalt in the alloys Nmc1, Nmc2, Nmc2,5, and Nmc5 should not exceed 0.5%.

4. In alloys Nmc1 and Nmc2 mass fraction of carbon should be not more than 0.05%.

5. Total mass fraction of volatile impurities lead, zinc, cadmium, arsenic, antimony, bismuth and phosphorus in alloys Nmc1 and Nmc2 shall not exceed 0.008%, including mass fraction of zinc 0.002%.

6. The grades NH9,5 and NH9 in new developments is not recommended.

Table 3

Extension table 3

Extension table 3

Extension table 3

Notes:

1. By agreement between manufacturer and consumer in the brand Mngmt 30−1-1 carbon content shall not exceed 0,03%.

2. For grades MN19, MN25, Mnzhmc10−1-1, Mnzhmc30−1-1, MNZH5−1, MNC12−24, MNC15−20, MNC18−27, MNC18−20 due to the Nickel content allowed the content of cobalt up to 0.5%.

3. The alloys MN25, Mnzhmc10−1-1, MNC12−24, MNC18−27, MNC18−20 in agreement with the user can determine the content of impurities of silicon, magnesium, arsenic, bismuth, phosphorus, tin, antimony.

4. In coordination with the consumer in the alloys of MN19, MNC15−20, Mnzhmc30−1-1 may be determined by the contents of the tin.

5. The characteristic properties of the alloys are given in Appendix 2.

(Changed edition, Rev. N 1, 2, 3, 4).


3. The cupronickel MN19 brand used for the manufacture of coins allowed a higher content of manganese or iron is more than indicated in table.3, but the sum should not exceed 1.3 percent. The cupronickel MN19 brand used for the manufacture of tapes for special purposes, the following impurities: manganese, not more than 0.01%, magnesium not more than 0.01%, silicon not exceeding 0.15%, iron not more than 0.3% and sum of impurities not more than 0.6%.

4. The Constantan brand Mnmc40−1,5 used in electronics, the zinc content shall be not more than 0.03%.

ANNEX 2*
Reference

_____________
* Annex 1 are excluded, Rev. N 4.

(Added, Rev. N 3).