Machinery Grade

8620 Steel

Carburized gears

Nickel-chrome-molybdenum carburizing steel with a hard surface and tough core. For gears, pinions and parts subject to surface wear. After carburizing it offers a high-hardness surface with a tough core, ideal for power transmission.

Standards and equivalents

SAE / AISI	EN	DIN	JIS
8620	21NiCrMo2	1.6523	SNCM220

Chemical composition

%	C	Si	Mn	Cr	Ni	Mo	P	S
Min	0.18	0.15	0.70	0.40	0.40	0.15	—	—
Max	0.23	0.35	0.90	0.60	0.70	0.25	0.035	0.040

Supply condition

Hot forgedAnnealed

Hot rolledAnnealed

Available package sizes

Plates1/4" – 10" thick6 mm – 254 mm

Round bars1-5/8" – 12"41 mm – 305 mm

—

—

Typical applications

• Gears
• Pinions
• Shafts
• Bushings
• Case-hardened parts
• Cams
• Worm wheels
• Rollers
• Hardened pins

Note: The information and values in this data sheet are provided for reference only and may vary depending on manufacturing, treatment and application conditions. They do not constitute guaranteed specifications, so use and interpretation of this data is the user's responsibility.

Total or partial reproduction of this document is prohibited without prior authorization.