ASTM A542 / A542M Type A

Chemical Properties

Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Molybdenum	Copper	Nickel	Vanadium
0.18	0.25–0.66	0.025	0.025	0.50	1.88–2.62	0.85–1.15	0.43	0.43	0.04

Mechanical Properties

Class	Tensile strength,min: ksi [MPa]	Yield strength,min: ksi [MPa]	Elongation in 2 in. [50 mm] min, %A,B
Class 1	105–125 [725–860]	85 [585]	14
Class 2	115–135 [795–930]	100 [690]	13
Class 3	95–115 [655–795]	75 [515]	20
Class 4	85–110 [585–760]	55 [380]	20
Class 4a	85–110 [585–760]	60 [415]	18

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