ATI Allegheny Ludlum Stainless Steel Free Machining Grade Type 416, Tempered at 538°C (UNS S41600)

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ATI Allegheny Ludlum Stainless Steel Free Machining Grade Type 416, Tempered at 538°C (UNS S41600)
Categories:	Metal; Ferrous Metal; Stainless Steel; T 400 Series Stainless Steel
Material Notes:	Allegheny Ludlum's 416 is a free-machining stainless steel specifically designed to exhibit improved machinability. These modifications retain, in so far as possible, the good mechanical properties and corrosion resistance of the basic or patent compositions which they represent. Sulfur is added to produce the free-machine characteristics. Type 416 is a martensitic 12 to 13% Cr free-machining stainless steel which can be hardened by heat treatment to higher strength and hardness levels. It has better machining properties than the austenitic grades, but lower corrosion resistance. Tensile strength and hardness below for samples oil quenched from 1800°F (982°C) then tempered at 538°C. Information provided by Allegheny Ludlum Corporation.
Key Words:	ASTM A895; SAE J405
Vendors:	Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	7.64 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	260
Hardness, Rockwell C	26
Tensile Strength, Ultimate	931 MPa @Temperature 23.0 °C
Tensile Strength, Yield	758 MPa @Strain 0.2 %
Elongation at Break	19 %	in 2" (50 mm)
Reduction of Area	52 %
Tensile Modulus	200 GPa
Fatigue Strength	470 MPa	test conditions not reported

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000570 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	10.1 µm/m-°C @Temperature 20.0 - 100 °C
	11.5 µm/m-°C @Temperature 20.0 - 500 °C
	12.4 µm/m-°C @Temperature 20.0 - 787 °C
Thermal Conductivity	24.9 W/m-K
Melting Point	1490 °C
Maximum Service Temperature, Air	677 °C	oxidation resistance is good in continuous service

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.15 %
Chromium, Cr	12 - 14 %
Iron, Fe	86 %	as balance
Manganese, Mn	<= 1.25 %
Molybdenum, Mo	<= 0.60 %
Phosphorus, P	<= 0.060 %
Silicon, Si	<= 1.0 %
Sulfur, S	>= 0.15 %

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