ANSI B16.34 ASTM A351 CF8M Forged Cryogenic Ball Valve 1/4 Inch CL150

Type: Cryogenic Ball Valve
Material: ASTM A351 CF8M
Standard: ANSI B16.34
Size: 1/4 Inch
Class Rating: 150 LBS
End: Threaded, Flanged
Operation: Lever, Gear, Pneumatic, Electric Actuated

Trade Designations

What is the difference between ASTM A351 CF8M, A743 CF8M and A744 CF8M?

Chemically and physically these standards are virtually identical with the exception of the silicon content which is slightly higher for both A743 and A744 at 2.00% max. This means that if the process requirements outlined by the purchaser are met, the casting material may be certified to any of these standards. The difference in the standard lies in the intended purpose of the part.

For more information, the applicable standards may be purchased from the ASTM website at the following pages. A351 / A743 / A744

Why is CF8M slightly magnetic?

CF8M is slightly magnetic in comparison to its equivalent wrought grade AISI 316 because of the ferrite content.

Elemental Composition for ASTM A351 CF8M

Carbon:		0.08% Max
Manganese:		1.50% Max
Silicon:		1.50% Max
Phosphorous:		0.040% Max
Sulphur:		0.040% Max
Nickel:		9.00 – 12.00%
Chromium:		18.00 – 21.00%
Molybdenum:		2.00 – 3.00%

Mechanical Property for ASTM A351 CF8M

Tensile Strength:		70,000 PSI Min
Yield Strength:		30,000 PSI Min
Elongation at 2in.:		30.0% Min