STAS 8121/3-85

Type 1 = DIN 2510 NF ; Type 2 = DIN 2510 TF

1.7218 / 25CrMo4+QT (KG)

1.7709 / 21CrMoV5-7+QT (GA)

1.7225 / 42CrMo4+QT (GC)

SA193/320-B7/L7, B7M/L7M, B16, B8, B8M, B8T

1.7225 / 42CrMo4+QT (GC)

1.4980 / X6NiCrTiMoVB25-15-2+QT (SD)

1.4923 / X22CrMoV12-1+QT (V,VH

all materials

Romania National standard

Table of Sizes

d	e	s	m	d2 - type 1	d2 - type 2
M12	min 23.91	21.67 - 22.00	12.00 - 12.43	20.67 - 21.00	14.23 - 14.50
M16	min 29.56	26.67 - 27.00	16.00 - 16.43	25.67 - 26.00	18.17 - 18.50
M20	min 35.03	31.61 - 32.00	20.00 - 20.52	30.61 - 31.00	22.17 - 22.50
M24	min 39.55	35.38 - 36.00	24.00 - 24.52	34.61 - 35.00	26.17 - 26.50
M27	min 45.20	40.38 - 41.00	27.00 - 27.52	39.61 - 40.00	30.11 - 30.50
M30	min 50.85	45.38 - 46.00	30.00 - 30.52	44.61 - 45.00	33.11 - 33.50
M33	min 55.37	49.38 - 50.00	33.00 - 33.62	48.61 - 49.00	36.11 - 36.50
M36	min 60.79	54.26 - 55.00	36.00 - 36.62	53.04 - 53.50	39.11 - 39.50
M39	min 66.44	59.26 - 60.00	39.00 - 39.62	58.04 - 58.50	42.11 - 42.50
M42	min 72.09	64.26 - 65.00	42.00 - 42.62	63.04 - 63.50	45.11 - 45.50
M45	min 77.74	69.26 - 70.00	45.00 - 45.62	68.04 - 68.50	49.11 - 49.50
M48	min 83.39	74.26 - 75.00	48.00 - 48.62	73.04 - 73.50	53.04 - 53.50
M52	min 89.04	79.26 - 80.00	52.00 - 52.74	78.04 - 78.50	57.04 - 57.50
M56	min 94.47	84.13 - 85.00	56.00 - 56.74	82.96 - 83.50	62.54 - 63.00
M64	min 105.77	94.13 - 95.00	64.00 - 64.74	92.96 - 93.50	70.54 - 71.00
M72	min 117.07	104.13 - 105.00	72.00 - 72.74	102.96 - 103.50	78.54 - 79.00

Romania National standard

1.7218 / 25CrMo4+QT (KG)

1.7225 / 42CrMo4+QT (GC)

1.7709 / 21CrMoV5-7+QT (GA)

1.4913 / X19CrMoNbVN11-1+QT (VW)

1.4923 / X22CrMoV12-1+QT1 (V)

1.4980 / X6NiCrTiMoVB25-15-2 (SD)

1.4986 / X7CrNiMoBNb16-16 (SD)

ASTM/ASME B7/L7, B16, B8,B8-2, B8M, B8M-2