A299 Chemical composition,A299 Mechanical properties

A 299 is an important grade under ASTM standard, one class of boiler and pressure vessels. Refer to A299 Chemical composition,A299 Mechanical properties, A299 is suggested that all the plates to be done ultrasonic test and PWHT for improving steel properity and safety.

Category: Alloy Steel

Updatetime: 21-Aug-2023

A 299 steel plate is an important grade under ASTM standard, one class of boiler and pressure vessels. Refer to A299 Chemical composition,A299 Mechanical properties, A299 is suggested that all the plates to be done ultrasonic test and PWHT for improving steel properity and safety when using in high pressure situiations in yard.

A299 chemical composition :

Grade	C (max)	Si (max)	Mn	P (max)	S (max)
A 299	0.28-0.30	0.13-0.45	0.84 -1.62	0.035	0.035

A299 mechanical properties :

Grade	Tensile strength Rm for product thickness in mm	Upper yield stress ReH for product thickness in mm	Elongation after fracture (Lo=5 do) % min
A 299	310-325	550-690	19