Overview
CG8M is a versatile "300 series" stainless steel alloy renowned for its exceptional toughness and general corrosion resistance. This austenitic stainless steel boasts a composition of up to 21% chromium and 13% nickel, contributing to its enhanced resistance against a wide range of corrosive environments. CG8M offers a good balance of strength, wear resistance, and galling resistance, making it suitable for applications involving moderate mechanical stress and friction. Its exceptional toughness allows it to absorb significant impact energy without fracturing, making it a reliable choice for applications where resistance to shock and vibration is important. This combination of corrosion resistance, strength, and toughness makes CG8M a valuable choice for diverse applications requiring a balance of performance and durability.
Typical Uses
Bearings, chemical and food processing, furnace fixtures, heat exchangers, piping, pressure vessels, pulp & paper components, pump and valve components, nuclear flow control, sink rolls.
MetalTek Designation
MTEK 317
Poured At:
Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division
Similar Specifications
Cast UNS: J93000
Wrought UNS: S31700
Wrought Grade: 317
Cast Grade: CG8M
Cast ASTM: A351, A743, A744
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.08
Chromium: 18-21
Manganese: 1.50
Iron: n/a
Copper: n/a
Nickel: 9-13
Lead: n/a
Tin: n/a
Silicon: 1.50
Zinc: n/a
Other: Mo 3-4
Minimum Mechanical Properties
Heat Treatment: Solution Annealed
Frequently Asked Questions
Austenitic steel is a non-magnetic stainless steel alloy with high chromium and nickel content. It provides excellent corrosion resistance, formability, and weldability, making it ideal for industrial and food-grade applications.
Common applications include food processing equipment, pump and valve components, chemical processing equipment, and heat exchangers due to its excellent corrosion resistance.
Super austenitic steels contain higher levels of molybdenum, nickel, and nitrogen than standard austenitic steels, enhancing their resistance to pitting, crevice corrosion, and stress corrosion cracking in harsh environments.
Benefits include superior corrosion resistance, high ductility, excellent weldability, and good performance at both cryogenic and elevated temperatures.
Austenitic stainless steel is corrosion-resistant and non-magnetic, while martensitic stainless steel is magnetic, harder, and better suited for wear-resistant and high-strength applications.
In its annealed state, austenitic stainless steel is non-magnetic. However, it may exhibit slight magnetism after cold working due to partial transformation into martensite.
Common austenitic grades include 304, 309, 310 and 316 stainless steels. These are widely used across industries for their excellent corrosion resistance and mechanical properties.
Austenitic steel offers better corrosion resistance and ductility than ferritic steel, which is magnetic, has lower chromium content, and is more cost-effective but less weldable.
