1.4878 | AISI 321H – hitzebeständiger Edelstahl

1.4878 || AISI 321H

Heat-resistant Stainless Steel

1.4878 || AISI 321H

General properties in processing:

  • Good machinability
  • Good weldability

Distinguishing properties:

  • Scale resistant up to 850 °C

Corrosion resistance:

  • In oxidizing media up to 850 °C
  • In oxidizing and sulfur-containing media up to 750 °C

Applications:

  • Apparatus and container construction
  • Automotive industry
  • Chemistry and petrochemistry
  • Industrial furnace construction
  • Pulp and paper industry

Chemical values – Reference analysis (weight proportion in %)

C 0,04 – 0,10
Si max 1,0
Mn max 2,0
P max 0,045
S max 0,015
Cr 17,0 – 19,0
Ni 9,0 – 12
Ti 5xC – 0,8

Mechanical values at room temperature

Hardness HB ≤ 215
Yield strength Rp 0.2 ≥ 190 N/mm2
Tensile strength Rm 550 – 700 N/mm2
Elongation A5 ≥ 40 %

Creep strength

Creep strength is the mechanical initial stress that causes a material to break after a certain period of stress duration and at a constant temperature above the transition temperature under constant tensile force.

Temperature 1 000 h 10 000 h100 000 h
Temperature: 600 °C
1 000 h :
200 N/mm2
10 000 h:
142 N/mm2
100 000 h:
65 N/mm2
Temperature: 700 °C
1 000 h :
88 N/mm2
10 000 h:
48 N/mm2
100 000 h:
22 N/mm2
Temperature: 800 °C
1 000 h :
30 N/mm2
10 000 h:
15 N/mm2
100 000 h:
10 N/mm2

Creep limit

Creep limit is the initial stress that leads to a specified plastic deformation under constant tensile stress at a predetermined temperature and duration of stress.

Temperature 1 % Creep limit for 1,000 h10 000 h
Temperature: 600 °C
1 % Creep limit for 1,000 h:
110 N/mm2
10 000 h:
85 N/mm2
Temperature: 700 °C
1 % Creep limit for 1,000 h:
45 N/mm2
10 000 h:
30 N/mm2
Temperature: 800 °C
1 % Creep limit for 1,000 h:
15 N/mm2
10 000 h:
10 N/mm2

Coefficient of thermal expansion

Coefficient of thermal expansion for heat-resistant alloys, which have a high coefficient of thermal expansion and low thermal conductivity, leading to temperature and stress differences in a component or assembly. The coefficient of thermal expansion is expressed by the proportional length change for each degree of temperature increase, usually as 10 –6 K –1.

Temperature Coefficient of thermal expansion
Temperature: 200 °C
Coefficient of thermal expansion:
17,0
Temperature: 400 °C
Coefficient of thermal expansion:
18,0
Temperature: 600 °C
Coefficient of thermal expansion:
18,5
Temperature: 800 °C
Coefficient of thermal expansion:
19

Standards for pipes

  • EN 10216-5
  • EN 10297-2
  • ASME SA312

The information provided on this page is non-binding. It serves only as orientation.
We cannot guarantee the results in processing and application of the products.

Tables and rates

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