ASTM A320 Grade L43

ASTM A320 Grades

Mechanical properties of fasteners made of Stainless-steel Grade L43

The Grade L43 Stainless Steel Bolting for Low-Temperature Service

The ASTM A320 Grade L43 specification covers stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1” in diameter.

ASTM A320 Grade L43
L43 Hex bolts, screws, stud bolts, double ended studs, Stud for foundation, wind energy bolts, Fasteners for wind turbines
ASTM A320 Grade L43 Chemical properties

Property class

Chemical composition

C.

Mn.

Si.

P.

S.

Cr.

Ni.

Mo.

V.

Ti.

L43

0.38-0.43

0.60-0.85

0.15---0.35

0.035 max.

0.040 max.

0.70-0.90

1.65-2.00

0.20-0.30

-

-

ASTM A320Grade L43 Mechanical properties

Class, Diameter In

Heat TreatmentB

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

4 [100] and underA

quenched and tempered

125 (860)

105 (725)

16

50

321 HBC or 35 HRC