1.4401
Data sheet grade 1.4401 / AISI 316
X5CrNiMo17-12-2
Austenitic corrosion-resistant stainless steel
Brief description
The material 1.4401 or AISI 316 is a chromium-nickel-molybdenum steel frequently used in the food and chemical industries. It offers good corrosion resistance in chlorinated and acidic media. This grade differs from the material 1.4404 due to a higher carbon content.
Standards and nomenclature
| EN | |
|---|---|
| DIN | X5CrNiMo17-12-2 |
| AISI | 316 |
| US | S31600 |
| EN | |
|---|---|
| DIN | X5CrNiMo17-12-2 |
| AISI | 316 |
| US | S31600 |
Chemical composition
| C (carbon) | - | 0,07 |
| Mn (manganese) | - | 2,0 |
| Si (silicon) | - | 1,0 |
| P (phosphorus) | - | 0,045 |
| S (sulphur) | - | 0,030 |
| Cr (chromium) | 16,5 | 18,5 |
| Ni (nickel) | 10,0 | 13,0 |
| Mo (molybdenum) | 2,0 | 2,5 |
| N (nitrogen) | - | 0,1 |
-
-
min.
max.
C
(carbon)
-
0,07
Mn
(Manganese)
-
2,0
Si
(Silicon)
-
1,0
P
(phosphorus)
-
0,045
S
(sulphur)
-
0,030
Cr
(chrome)
16,5
18,5
Ni
(nickel)
10,0
13,0
Mo
(Molybdenum)
2,0
2,5
N
(Nitrogen)
-
0,1
General properties
| Corrosion resistance | |
|---|---|
| Mechanical properties | medium |
| Forgeability | good |
| Weldability | medium |
| Machinability | medium |
Special properties
Polishable
Suitable for low temperatures
Can be used up to 550°C
Corrosion resistance
In natural environmental media, in media with moderate chlorine and salt concentrations and in the food industry, material 1.4401 is characterised by excellent corrosion resistance. The material 1.4401 is not resistant to intergranular corrosion, which is due to its high carbon content. This grade is also not resistant to seawater. (PREN = 23.1 - 28.5)
Mechanical properties
at 20°C
Hardness
HB
≤ 215
Yield point
Rp0,2
N / mm²
≥ 200
Tensile strength
Rm
N / mm²
500 - 700
Elongation
A5,65
≥ 40%
Modulus of elasticity
kN / mm²
200
Forgeability
The forging process involves heating to approx. 1150°C - 1180°C in order to forge in a temperature range of 1180°C - 950°C. This is followed by rapid air or water cooling. This is followed by rapid air or water cooling. Corrosion resistance is reduced by scale or annealing colours. This is removed by chloride-free chemical or mechanical processes.
Weldability
The material 1.4401 can be welded well with and without filler metal. Heat treatment after welding is required.
Machinability
Compared to the lower-carbon 1.4404 machining the material 1.4401 is somewhat more difficult.
Markets & Applications
Apparatus and vessel construction
Automotive industry
Construction industry
Chemical and petrochemical industry
Decorative applications
Food industry
Mechanical engineering
Physical properties
at 20°C
Density
kg/dm³
8,0
Electrical
Resistance
(ohm) mm²/m
0,75
Magnetisability
low
Thermal conductivity
W/m K
15
Specific
Heat capacity
J/kg K
500
Processing
| Cold forming | |
|---|---|
| Cold heading | rare |
| Polishability | Yes |
| Open-die and closed-die forging | Yes |
| Machining | Yes |
Thermal treatment
| Solution annealing (+AT) | |
|---|---|
| Hot forming | 1200 - 900°C (cooling: air) |
| Solution annealing (+AT) | |
|---|---|
| Hot forming | 1200 - 900°C (cooling: air) |
Frequently asked questions
Important note
TEAM EDELSTAHL operates purely as a trading company without technical staff. As a result, we cannot and must not provide materials consulting.
The above values and information on the properties and/or usability of the material are purely informative. This information is based on the experience of the manufacturer and TEAM EDELSTAHL. All information is without guarantee. Misprints, errors and changes excepted.
