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1、 I N T E R S T A T ES T A N D A R DLOW-ALLOWED STRUCTURAL ROLLED STOCK FOR BRIDGE BUILDING TECHNICAL SPECIFICATIONS GOST 6713-91 Official Edition English Version Approved by Interstandard STANDARDS PUBLISHING HOUSE Mosco
2、w ГОСТ 6713-91 2Angular equal-channel rolled products of usual accuracy of rolling (Б), with dimensions of 100·100·10 mm from steel 16Д: Б-100·100·10 ГОСТ 8509-86 Уголок 16Д ГОСТ 6713-91 Wide-strip
3、(general-purpose) rolled products of usual accuracy with edging curvature of class A, with dimensions of 15·250 mm from steel of grade 10XCHД, category 1: А-15·250·ГОСТ 82-70 Уголок 10ХСНД ГОСТ 6713-91
4、2. TECHNICAL REQUIREMENTS 2.1. Rolled products shall be manufactured in accordance with the requirements of this Standard and from production schedule approved in accordance with the established procedure. 2.2. Character
5、istics 2.2.1. Chemical composition of steel shall meet norms given in table 1. T a b l e 1 Mass fraction of elements, % Phosphorus Sulfur Grade of steel Carbon Silicon Manganese Chromium Nickel Copper No more tha
6、n 16Д 0.10 — 0.18 0.12 — 0.25 0.40 — 0.70 Up to 0.30 Up to 0.30 0.20 — 0.35 0.035 0.040 15XCНД 0.12 — 0.18 0.40 — 0.70 0.40 — 0.70 0.60 — 0.90 0.30 — 0.60 0.20 — 0.40 0.035 0.035 10XCHД Up to 0.12 0.80—1.10 0.50
7、 — 0.80 0.60 — 0.90 0.50 — 0.80 0.40 — 0.60 0.035 0.035 N o t e s : 1. In steel deoxidized by aluminum, the residual content of acid-soluble aluminum shall be of no less than 0.02 %. It is allowed to use other deoxid
8、izers, provided that all requirements of this Standard are observed. 2. Rolled products from steel of grade 16Д shall be analyzed for chromium and nickel, and all grades of rolled products shall be analyzed for arsenic a
9、nd nitrogen on demand of the customer. 3. In rolled products of bridge constructions of northern modification, the mass fraction of sulfur shall not be of more than 0.030 %; that of phosphorus shall not be of more than 0
10、.025 %; this requirement shall be specified in the order. By agreement between the manufacturer and the customer, it is allowed to manufacture steel of electroslag remelting; here, character III separated with a dash sh
11、all be added to the grade denotation of steel. 4. In the ready rolled products from steel of grade 15XCHД, of category 3, the mass fraction of carbon shall be of no more than 0.18 %. In steel of grade 15XCHД, of category
12、 3, the lower limit of mass fraction of carbon shall not be the rejection characteristic, if mechanical characteristics are satisfactory. 5. In rolled products from steel of grade 10XCHД, of category 3, the mass fractio
13、n of silicon shall be from 0.70 to 1.00 %. 6. In rolled products from steel of grade 16Д with the mass fraction of carbon from 0.10 to 0.12 %, an increased mass fraction of manganese of up to 0.80 % is allowed. 2.2.2.
14、The mass fraction of nitrogen in steel shall not exceed 0.008 %; that of arsenic shall not exceed 0.08 %. The mass fraction of nitrogen in the ready rolled products of up to 0.012 % is allowed. 2.2.3. In the ready rolle
15、d products, deviations of mass fraction of elements from values given in table 1 are allowed, provided that mechanical characteristics are ensured and other requirements of this Standard are observed. The allowable limi
16、ting deviations are given in table 2. 2.2.4. Rolled products shall be manufactured with guarantees of weldability. Weldability of steels shall be ensured by manufacturing process and observing of all requirements for che
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