A brief introduction to A694 and A694 F60

ASTM A694F60Chemical Component
F60	C	Mn	Si	S	P	Cr	Mo	Ni	Al
	0.12-0.18	0.90-1.30	0.15-0.40	0.010MAX	0.015MAX	0.25MAX	0.15MAX	0.03MAX	0.025-0.05
	Cu	Sn	V	Nb	Ti	N	Co	B	Ta
	0.25MAX	/	0.04MAX	0.03MAX	0.0025MAX	0.012MAX	/	0.0005MAX	/

Technology for Heating Processing
F60	Heat Treatment
	Heated to temp. 1650(900C), and keeping for 6 hours,water quenched.
	Tempered at temp. 1000F(560C) for 6 hours., air cooled

ASTM A694 is an American steel grade
ASTM A694 Forgings for Carbon and Alloy Steel Pipe Flanges, Fittings, Valves and Parts for High Pressure Transmission Equipment
A694 has a total of F42 F46 F48 F50 F52 F56 F60 F65 F70
A694 is a steel grade in the United States, and its chemical composition is close to that of Q345D in China. Q345D needs to undergo strict heat treatment procedures before reaching the mechanical properties of A694 F60.

In addition, ASTM A694 Gr.F60 is also a low alloy steel material used for pipe fittings under high pressure and high temperature, so it is also called A694 F60 high pressure fittings.
This material is usually used for high-pressure pipeline connections in oil, natural gas and chemical industries, and has high tensile strength and corrosion resistance.

As for the hardness range of ASTM A694 Gr.F60, there is no specific hardness requirement. The hardness depends on the specific heat treatment conditions and material status. Generally, the hardness range of A694 F60 material is tested under Brinell hardness (HB) or Rockwell hardness (HRC). The hardness value will vary according to the chemical composition, heat treatment conditions and manufacturing process of the material.

Take the butt weld flange of A694 F60 as an example to explain:

A694 F60 butt welding flange is not easy to deform, has good sealing and is widely used. It is applicable to pipelines with large pressure or temperature fluctuations or high temperature, high pressure and low temperature pipelines. It is generally used for the connection of pipelines and valves with PN greater than 2.5MPa; It is also used in pipelines conveying expensive, flammable and explosive media. It has a long service life. According to the field corrosion test data, its service life can reach 100 years and hardly needs maintenance. Therefore, its performance-price ratio is very good, its operating life cost is low, and its economic benefits are significant.

A694 F60 butt welding flange is characterized by reliable and safe connection, convenient and fast construction, good sanitation and environmental protection performance, small flow pressure loss, strong system compatibility, both open and concealed installation, no renewal and maintenance, superior economic performance, and wide application range. It is applicable to civil low pressure fluid transmission such as cold and hot water, direct drinking water, heating, air conditioning, fire protection, gas, etc., as well as medicine, beverage, food Low-pressure fluid transmission in chemical industry and other industries.