Приложение В (обязательное). Параметры марочных полос (пределы колебания твердости HRC и HRB по длине торцового образца)

Приложение В
(обязательное)

Параметры марочных полос (пределы колебания твердости HRC и HRB по длине торцового образца)

Таблица В.1

Расстояние от торца, мм	Твердость для полос прокаливаемости стали марок
	35		40		45
	макс.	мин.	макс.	мин.	макс.	мин.
1,5	57,0 HRC	49,5 HRC	58,0 HRC	50,5 HRC	59,0 HRC	50,5 HRC
3,0	55,0 HRC	44,0 HRC	57,0 HRC	45,5 HRC	57,0 HRC	45,5 HRC
4,5	49,0 HRC	27,0 HRC	52,5 HRC	29,0 HRC	54,0 HRC	29,0 HRC
6,0	38,0 HRC	23,0 HRC	37,5 HRC	26,0 HRC	42,5 HRC	26,0 HRC
7,5	31,0 HRC	20,0 HRC	33,5 HRC	24,0 HRC	36,5 HRC	24,0 HRC
9,0	30,0 HRC	94,0 HRB	32,0 HRC	22,0 HRC	33,0 HRC	22,0 HRC
10,5	29,0 HRC	93,0 HRB	30,0 HRC	20,0 HRC	32,5 HRC	21,0 HRC
12,0	28,0 HRC	92,0 HRB	29,0 HRC	94,0 HRB	31,0 HRC	20,0 HRC
13,5	27,5 HRC	91,0 HRB	28,0 HRC	93,0 HRB	30,0 HRC	94,0 HRB
15,0	27,0 HRC	90,0 HRB	27,5 HRC	92,0 HRB	29,5 HRC	93,0 HRB
16,5	26,5 HRC	89,0 HRB	27,0 HRC	91,0 HRB	29,0 HRC	92,0 HRB
18,0	26,0 HRC	88,0 HRB	26,5 HRC	89,0 HRB	28,5 HRC	91,0 HRB
19,5	25,5 HRC	87,0 HRB	26,0 HRC	88,0 HRB	28,0 HRC	90,0 HRB
21,0	25,0 HRC	86,0 HRB	25,5 HRC	87,0 HRB	27,0 HRC	89,0 HRB
24,0	24,0 HRC	85,0 HRB	25,0 HRC	86,0 HRB	26,0 HRC	88,0 HRB
27,0	23,0 HRC	84,0 HRB	24,0 HRC	85,0 HRB	25,0 HRC	87,0 HRB
30,0	22,0 HRC	83,0 HRB	23,0 HRC	84,0 HRB	24,0 HRC	86,0 HRB
33,0	+	+	22,5 HRC	83,0 HRB	+	+
36,0	+	+	22,0 HRC	82,0 HRB	+	+
Примечание - Знак "+" означает, что контроль твердости проводят для набора статистических данных, результаты контроля заносят в документ о качестве.