ASTM A320 Grade L1 Stud Bolts

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A320 Grade L1 Stud Bolts are manufactured from 4140 Alloy Steel in accordance with ASTM A320 specification. Torqbolt is a prominent A320 Grade L1 Stud Bolt supplier in India.

ASTM A320 Grade L1 Stud Bolts Properties

ASTM A320 Grade L1 Stud Bolts Chemical Requirements

Ferritic Steels

Grade Symbol	Description		C	Mn	P, max	S, max	Si	Ni	Cr	Mo	B
ASTM A320 L1	Low - C, B	Range,%	0.17 - 0.24	0.70 - 1.40	0.035	0.05	0.15 - 0.30	...	...	...	0.001 - 0.003
ASTM A320 L1	Low - C, B	Product Variation, % Over or Under	0.01	0.04	0.005 over	0.005 over	0.02	...	...	...	...

ASTM A320 Grade L1 Stud Bolts Mechanical Requirements

Ferritic Steels

Class and Grade, Diameter, in. [mm]	Heat Treatment	Minimum Tempering Temperature, °F [°C]	Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa] (0.2 % offset)	Elongation in 2 in. or 50 mm, min, %	Reduction of Area, min, %	Hardness, max
ASTM A320 L1 1[25] and under^A	quenched and tempered	. . .	125[860]	105[725]	16	50	. . .

ASTM A320/A320M Impact Test Requirements

Grade	Test Temperature		CVN Specimen Section Size, mm	Min Average Impact Toughness of Three Test Specimens, ft-lbf [J]	Min Impact Value of a Single Specimen of Set of Three, ft-lbf [J]
Grade	°F	°C	CVN Specimen Section Size, mm
ASTM A320 L1	- 100	- 73	10 × 7.5	32 [44]	24 [32]

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