1.4404
Data sheet material 1.4404 / AISI 316L
X2CrNiMo17-12-2
Austenitic corrosion-resistant stainless steel
Brief description
The material 1.4404, also known as AISI 316L, is one of the most widely used corrosion-resistant stainless steels. Due to its 2–2.5% molybdenum content, it offers significantly improved corrosion resistance compared to 1.4301/1.4307. With its reduced carbon content compared to 1.4401, 1.4404 also provides very good processing and fabrication properties. 1.4301/1.4307. Due to its lower carbon content compared to 1.4401 the material 1.4404 is also characterised by good processing properties.
Standards and nomenclature
| EN | |
|---|---|
| DIN | X2CrNiMo17-12-2 |
| AISI | 316L |
| US | S31603 |
| EN | |
|---|---|
| DIN | X2CrNiMo17-12-2 |
| AISI | 316L |
| US | S31603 |
Chemical composition
| C (carbon) | - | 0,03 |
| 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)
-
0,03
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 | excellent |
| Machinability | medium |
Special properties
Polishable
Suitable for low temperatures
Can be used up to 550°C
Resistant to intercrystalline corrosion in continuous operation up to 300°C
Corrosion resistance
In natural environments, in media with moderate chloride and salt concentrations, and in the food processing industry, grade 1.4404 exhibits excellent corrosion resistance. The alloy is resistant to intergranular corrosion due to its low carbon content. However, this grade is 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
During forging, the material is heated slowly to approximately 1150°C–1180°C and forged within a temperature range of 1180°C–900°C. This is followed by rapid cooling in air or water. Corrosion resistance is reduced by scale or temper colours, which must be removed using chloride-free chemical or mechanical methods.
Weldability
Grade 316L can be welded well, with or without filler metals. Post-weld heat treatment is not required. Welding does not affect its resistance to intergranular corrosion.
Machinability
Due to its lower carbon content compared to 316 ( 1.4401 ), grade 316L (1.4404) is easier to machine.
Markets & Applications
Apparatus and vessel construction
Automotive industry
Construction industry
Chemical and petrochemical industry
Decorative applications
Food industry
Aviation
Mechanical engineering
Pharmacy
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 | Yes |
| 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.
