اطلاعات فنی پیچ های آلیاژی

ASTM A193, A320			L7	B6	B7	B7M	B16
CHEMICAL ANALYSIS		CARBON	0.38 - 0.48	< 0.15	0.37 - 0.49	0.37 - 0.47	0.36 - 0.47
		MANGANESE	0.75 - 1.00	< 1	0.65 - 1.10	0.65 - 1.10	0.45 - 0.70
		MAX PHOSPHORUS	0.035	0.04	0.035	0.035	0.035
		MAX SULFUR	0.04	0.03	0.04	0.04	0.04
		SILICON	0.15 - 0.35	< 1	0.15 - 0.35	0.15 - 0.35	0.15 - 0.35
		NICKEL
		CHROMIUM	0.80 - 1.10	11.5 - 13.5	0.75 - 1.20	0.75 - 1.20	0.80 - 1.15
		MOLYBDENIUM	0.15 - 0.25		0.15 - 0.25	0.15 - 0.25	0.50 - 0.65
		COLOMBIUM + TANTALE
		TITANIUM
		VANADIUM					0.25 - 0.35
		MAX ALUMINIUM					0.015
EQUIVALENT		AISI	4142	410	4142	4142
		AFNOR	42 CD 4	Z12C13	42 CD 4	42 CD 4
		DIN	42 Cr. Mo.4 1.7225	X 10 Cr. 13 1.4006	42 Cr. Mo.4 1.7225	42 Cr. Mo.4 1.7225	24 Cr. Mo. v5-5 1.7733
		B.S	1506.621 Gr. A	1506.713	1506.621 Gr. A	1506.621 Gr. A	1506.661
MECHANICAL REQUIREMENTS	MINIMUM TENSILE STRENGTH N/mm2	180 > D > 100			690	690	690
		100 > D		760		690
		100 > D > 65			795		760
		65 > D	860		860	690	860
		40 > D > 32
		32 > D > 25
		25 > D > 20
		20 > D
	MINIMUM YIELD STRENGTH N/mm2	180 > D > 100			515	515	585
		100 > D		585		550
		100 > D > 65			655		655
		65 > D	725		720		725
		40 > D > 32
		32 > D > 25
		25 > D > 20
		20 > D
	MINIMUM ELONGATION IN 2" (%)	180 > D > 100			18	18	16
		100 > D		15		18
		100 > D > 65			16		17
		65 > D	16		16	18	18
		40 > D > 32
		32 > D > 25
		25 > D > 20
		20 > D
	MINIMUM REDUCTION OF AREA (%)				50		45
		100 > D		50	50	50	45
		65 > D	50		50		50

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