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UNS S41600

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UNS S41600 is a free-machining stainless steel with a machinability of 85%, highest of all stainless steels. With most of the free-machining stainless steels, the machinability can be improved by adding sulphur, which leads to the formation of manganese sulphide inclusions. Addition of sulphur also reduces the formability, weldability and corrosion resistance of UNS S41600 to below that of grade 410. Because of their high machinability and low cost, grade 416 steels are available in highly tempered, hardened or unhardened forms.

Martensitic steels with high hardness are manufactured using methods that require final hardening and tempering treatments. The corrosion resistance of these steels is lower than that of austenitic steels. Decrease in the ductility of martensitic steels at sub-zero temperatures, and strength at high temperatures due to over-tempering, are the two key factors that affect their operating temperatures.

Key Properties of UNS S41600

The following sections will discuss the properties of UNS S41600 bar products of ASTM A582. The specified properties may not be similar to other forms such as forgings and wires.

Composition of UNS S41600

The chemical composition ranges of UNS S41600  are given in the following table:

Table 1 - Composition ranges for UNS S41600 stainless steels

Grade

C

Mn

Si

P

S

Cr

Mo

UNS S41600

min.

max.

-

0.15

-

1.25

-

1

-

0.06

0.15

-

12

14

-

0.6

Mechanical Properties of UNS S41600

The table below provides the mechanical properties of UNS S41600 stainless steels:

Table 2 - Mechanical properties of UNS S41600 stainless steels

Tempering Temperature (°C)

Tensile Strength (MPa)

Yield Strength
0.2% Proof (MPa)

Elongation
(% in 50mm)

Hardness Brinell
(HB)

Impact Charpy V (J)

Annealed *

517

275

30

262

-

Condition T **

758

586

18

248-302

-





UNS S41600