Stainless Steel - Martensitic - 1.4005 (416) SS Plate

Stainless Steel - Martensitic - 1.4005 (416) SS Plate

Stainless Steel - Martensitic - 1.4005 (416) SS Plate Grade 416 has the highest machinability of any stainless steel, at about 85% of that of a free-machining carbon steel. As for most other free-machining stainless steels the improvement in machinability is achieved by addition of sulphur which...
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Stainless Steel - Martensitic - 1.4005 (416) SS Plate

Grade 416 has the highest machinability of any stainless steel, at about 85% of that of a free-machining carbon steel. As for most other free-machining stainless steels the improvement in machinability is achieved by addition of sulphur which forms manganese sulphide inclusions; this sulphur addition also lowers the corrosion resistance, weldability and formability to below that of its non-free machining equivalent Grade 410.


Grade 416 is sometimes used in the unhardened or hardened and highly tempered condition because of its low cost and ready machinability.


Chemical Composition

Grade

C

Mn

Si

P

S

Cr

Mo

416

min.

max.

-

0.15

-

1.25

-

1

-

0.06

0.15

-

12

14

-

0.6


Mechanical Properties

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

-

204

1340

1050

11

388

20

316

1350

1060

12

388

22

427

1405

1110

11

401

#

538

1000

795

13

321

#

593

840

705

19

248

27

650

796

670

17.5

253

38

* Annealed properties are typical for Condition A of ASTM A582.
** Hardened and tempered Condition T of ASTM A582 - Brinell hardness is specified range, other properties are typical only.
# Tempering of this steel at temperatures of 400 to 580°C should be avoided due to low impact resistance.


Physical Properties

Grade

Density (kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion
(μm/m/°C)

Thermal Conductivity
(W/m.K)

Specific Heat 0-100°C
(J/kg.K)

Electrical Resistivity (nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

416

7800

200

9.9

11

11.5

24.9

28.7

460

570


Grade Specification Comparison

Grade

UNS No

Old British

Euronorm

Swedish SS

Japanese JIS

BS

En

No

Name

416

S41600

416S21

56AM

1.4005

X12CrS13

2380

SUS 416


Possible Alternative Grades

Grade

Why it might be chosen instead of 416

410

The high machinability of 416 can be sacrificed to gain better corrosion resistance and formability.

303

A slight drop in machinability to gain better availability. Grade 303 is non-hardenable.

182

A free-machining Ferritic grade with better "soft magnetic" performance for solenoid shafts. Grade 182 is non-hardenable.


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