904L （1.4539）

Summary

1.4539 (alloy 904L) is an austenitic special steel with high molybdenum content as well as addition of copper and extremely low carbon content.

Standard Product Forms

Chemical Composition Wt,%

Min

Max.

Min.

Max.

Min.

Max.

Ni

23

28

Cu

1.0

2.0

C

0.02

Cr

19

23

Co

Si

1.0

Fe

Al

P

0.04

Mo

4

5

Ti

S

0.03

W

Mn

2.0

N

Physical

Constants

Density,g/ 8.24

Melting Range,℃

Typical Mechanical Properties

Elastic

Modulus

(Gpa)

200

Mean Co-eff of Thermal

Expansion (μm/m/℃)

0-100℃

15

0-315℃

0-538℃

Thermal Conductivity

(W/m.k)

At 20℃

13

At 500℃

Specific Heat

0-100 ℃

(J/Kg.K)

500

Elec Resistivity

(nΩ.m)

850

Tensile Strength (Mpa) min

490

Yield Stregth 0.2%

Proof (Mpa) min

220

Elongation (% in 50 MM)

min

35