Bohler-Uddeholm M300 Modified 420

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Bohler-Uddeholm M300 Modified 420 (discontinued **)
Categories:	Metal; Ferrous Metal; Stainless Steel
Material Notes:	Stainless martensitic chromium steel BOHLER M300 is ideal for applications such as plastic extrusion dies and cores and cavities for injection molding. BOHLER M300 can be supplied in both the pre-hardened and annealed conditions. BOHLER M300 is a stainless steel with elevated chromium content for resistance to corrosive environments and high cleanliness levels for applications requiring highly polished surfaces.
Key Words:	DIN 1.2316; DIN X36CrMo17; EN X38CrMo16
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Mechanical Properties	Metric	English	Comments

Hardness, Brinell	<= 235	<= 235	after annealing
	270 - 330	270 - 330	hardened and tempered
Hardness, Rockwell C	42 - 48	42 - 48	in air (750-840°F)
	46 - 49	46 - 49	in oil or salt bath (1830-1920°F)
Tensile Strength, Ultimate	<= 800 MPa	<= 116000 psi	annealed
	899.8 - 1100 MPa	130500 - 160000 psi	hardened and tempered
Tensile Strength, Yield	650 MPa @Strain 0.2 %	94300 psi @Strain 0.2 %	hardened and tempered
	470 MPa @Strain 0.2 %, Temperature 399 °C	68200 psi @Strain 0.2 %, Temperature 750 °F	hardened and tempered
	530 MPa @Strain 0.2 %, Temperature 199 °C	76900 psi @Strain 0.2 %, Temperature 390 °F	hardened and tempered

Component Elements Properties	Metric	English	Comments
Carbon, C	0.38 %	0.38 %
Chromium, Cr	16 %	16 %
Iron, Fe	80.77 %	80.77 %	as balance
Manganese, Mn	0.65 %	0.65 %
Molybdenum, Mo	1.0 %	1.0 %
Nickel, Ni	0.80 %	0.80 %
Silicon, Si	0.40 %	0.40 %

**
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NBUCOR32 / 15501

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