ГОСТ 1050-2013. Межгосударственный стандарт. Металлопродукция из нелегированных конструкционных качественных и специальных сталей. Общие технические условия

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.