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1、 U S S R S T A T E S T A N D A R D ALLOYED CONSTRUCTION STEEL SPECIFICATIONS GOST 4543 71 Official Edition USSR STATE COMMITTEE FOR STANDARDS Moscow Group B32 U S S R S T A T E S T A N D A R D ALLOYED CONSTRUCTION STEEL Specifications OKP (All-Union Product Classification Code) 09 5040 GOST 4543 71
2、Term from 01.01.73 to 01.01.95 regarding the first category, until 01.01.90 Failure to comply with this Standard will result in legal proceedings This Standard applies to alloyed construction hot-rolled and forged gauged steel with diameter or thickness up to 250 mm, and steel with a special surface
3、 finish, used in a thermally treated condition and produced in the form of bars, strips and hanks. Regarding the standards for chemical composition this Standard applies to all other types of rolled stock, ingots, and forged and punched pieces. The indicators of technological level, established by t
4、his Standard, shall be stipulated for premium and first categories of quality. The rolled stock with standardized quality indicators shall be considered as premium category of quality. (Amended Wording, Amendments Nos. 1, 2 and 4). 1. CLASSIFICATION 1.1. Depending on chemical composition and propert
5、ies, structural steel shall be divided into categories: quality; high quality-A; extra high quality-. Notes: 1. The steel of electroslag remelt shall be considered as extra high quality steel. 2. (Removed, Amendment No. 2). Official Edition Reprinting is prohibited ? *See Notes of “STANDARTINFORM” a
6、t the end of this Standard Standards Publishing House, 1988 STANDARTINFORM, 2008 p. 2 GOST 4543-71 1.2. Depending on the basic alloying elements, steel shall be subdivided into groups: chromium, manganese, chromomanganese, chromosiliceous, chromomolybdenum and chromomolybdenum-vanadium, chromovanadi
7、um, nickel-molybdenum, chromonickel and chromonickel with boron, chromosilicomanganese and chromosilicomanganese-nickel, chromomanganese-nickel and chromomanganese-nickel with titanium and boron, chromonickel-molybdenum, chromonickel-molybdenum-vanadium and chromonickel- vanadium, chromoaluminum and
8、 chromoaluminum with molybdenum, chromomanganese- nickel with molybdenum and titanium. (Amended Wording, Amendment No. 3). 1.3. Depending on treatment mode, the steel shall be divided into: hot-rolled and forged (including steel with turned or stripped surface); gauged; round steel with special surf
9、ace finish. (Amended Wording, Amendment No. 2). 1.4. Depending on purpose, hot-rolled and forged steel shall be divided into subgroups: a for hot working under pressure (except for setting, heading and punching); for cold machine working (turning, gouging, milling, etc.) on the whole surface; for co
10、ld drawing (semi-finished rolled products); for hot setting, heading and punching. Notes: 1. By agreement between the manufacturer and the customer the round bars designed for hot working under pressure and cold drawing, shall be produced with turned or stripped surface. 2. By agreement between the
11、manufacturer and the customer the production of rolled stock with surface quality of subgroup “a” for hot punching and setting shall be allowed until 01.01.90. (Amended Wording, Amendments Nos. 1, 2, 3 and 4). 1.5. Depending on condition of material, the steel shall be produced: without heat treatme
12、nt; heat-treated-T; cold-hardened-H (for gauged steel and for steel with special surface finish). (Subsequently Inserted, Amendment No. 2). 2a. ASSORTMENT 2a.1. The steel assortment shall comply with the requirements of GOST 2591-71, GOST 2590-71, GOST 2879-69, GOST 103-76, GOST 1133-71, GOST 7417-7
13、5, GOST 8559-75; GOST 8560-78, GOST 14955-77 and other specifications and technical documentation. GOST 4543-71 p. 3 Note. The manufacture of hot-rolled square steel with quadrate side up to 100 mm in compliance with GOST 2591-71 with angles, rounded in radius, not exceeding 0.15 of quadrate side, s
14、hall be allowed. Section 2a. (Subsequently Inserted, Amendment No. 2). Examples of identification numbers: Hot-rolled steel, square, with the quadrate side of 46 mm, of usual rolling accuracy B in compliance with GOST 2591-71, of grade 18, for hot working under pressure (subgroup a), heat-treated T:
15、 71454318 71259146 The same as above, but round, 80 mm in diameter, of usual rolling accuracy B in compliance with GOST 2590-71, of grade 18X2H4MA, for hot setting (subgroup ), version of mechanical properties 2, heat-treated T: 71454324218 71259180 The same as above, but a strip, 20 mm thick, 75 mm
16、 wide in compliance with GOST 103- 76, of grade 25, for cold machine working (subgroup ), version of mechanical properties 1, without heat treatment: 714543125 761037520 Gauged steel, round, 15 mm in diameter, with maximum deviations h11 in compliance with GOST 7417-75, of grade 40XH2MA, with surface quality of group in compliance with GOST 1051-73, with control of mechani
