WITTE | HiTEMP | Stock Program | 1.4841

1.4841 || AISI 314

Heat-resistant austenitic chromium-nickel steel

1.4841 is an advanced version of 1.4828 and belongs to the heat-resistant austenitic chromium-nickel steels that also exhibit good resistance to oxidation at high temperatures. Up to 1,100 °C, it shows excellent chemical resistance.

Heat-resistant Stainless Steel

1.4841 || AISI 314

Processing properties:

Moderately machinable (low cutting depths and speed)
Good weldability
Good forgeability

Distinguishing properties:

Scale resistant up to 1,150° C, application range from 900°C – 1,120°C
Risk of embrittlement at operating temperatures 600°C<>900°C
Standard grade in furnace construction
Good mechanical properties due to high tensile strength at higher temperatures
Better scale resistance than 1.4878

Corrosion resistance:

Low: against oxidizing or reducing sulfur-containing gases, therefore limited up to 650°C
Moderate: at temperatures >900 °C against carburizing or oxygen-poor gases

Applications:

Apparatus construction in the high-temperature range
Automotive industry
Construction industry
Chemistry and petrochemistry
High-temperature apparatus construction
Furnace construction
Recycling industry
Cement industry

Chemical values – Reference analysis (weight proportion in %)

C	≤ 0,20
Si	1,5 – 2,5
Mn	≤ 2,0
P	≤ 0,045
S	≤ 0,015
Cr	24,0 – 26,0
Ni	19,0 – 22,0
N	≤ 0,11

Mechanical values at room temperature

Hardness HB	≤ 223
Yield strength Rp 0.2	≥ 230 N/mm²
Tensile strength Rm	550 – 750 N/mm²
Elongation A5	≥ 30 %

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 h	100 000 h
Temperature: 600 °C	1 000 h: 170 N/mm²	10 000 h: 130 N/mm²	100 000 h: 80 N/mm²
Temperature: 700 ° C	1 000 h: 90 N/mm²	10 000 h: 40 N/mm²	100 000 h: 18 N/mm²
Temperature: 800 °C	1 000 h: 40 N/mm²	10 000 h: 20 N/mm²	100 000 h: 7 N/mm²
Temperature: 900 °C	1 000 h: 20 N/mm²	10 000 h: 10 N/mm²	100 000 h: 3 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 h	10 000 h
Temperature: 600 °C	1 % Creep limit for 1,000 h: 105 N/mm²	10 000 h: 95 N/mm²
Temperature: 700 °C	1 % Creep limit for 1,000 h: 50 N/mm²	10 000 h: 35 N/mm²
Temperature: 800 °C	1 % Creep limit for 1,000 h: 23 N/mm²	10 000 h: 10 N/mm²
Temperature: 900 °C	1 % Creep limit for 1,000 h: 10 N/mm²	10 000 h: 4 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: 15,5
Temperature: 400 °C	Coefficient of thermal expansion: 17,0
Temperature: 600 °C	Coefficient of thermal expansion: 17,5
Temperature: 800 °C	Coefficient of thermal expansion: 18,0
Temperature: 1 000 °C	Coefficient of thermal expansion: 19,0

Standards for seamless pipes

EN 10216-5
SEW 470
ASME SA 312

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.