1.4435*, DIN X2CrNiMo18-14-3, AISI 316L

1.4435*, DIN X2CrNiMo18-14-3, AISI 316L

Designation by Standards

 

Chemical Composition (in weight %)

Description
316L is often substituted for 316 stainless due to its superior weldability with no appreciable difference in price or properties. It combines good availability in all forms and size ranges with great strength and corrosion resistance.

Applications
Components used in marine environments and chemical equipment. Suitable for any application where 316 stainless is used and stronger welds are desirable.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 200, 186 (200^oC), 172 (400^oC)
Density [g/cm³]: 8.0
Thermal conductivity [W/m.K]: 15.0
Electric resistivity [Ohm mm²/m]: 0.75
Specific heat capacity[J/g.K]: 0.500
Magnetisable: No

Coefficient of Linear Thermal Expansion 10^{-6 o}C^-1

Quenching
Harden from a temperature of 1020-1120^oC followed by water or air (sufficiently fast) quenching. Structure is austenite.

Mechanical properties at at ambient temperature
Condition: Solution-Annealed condition

For diameter d<=160 mm
0.2% proof stress: 200 N/mm²
1% proof stress: 225 N/mm²
Tensile strength: 500-700 N/mm²
Elongation: 40% (Longit.)
Charpy notch (ISO-V): 100 J (Longit.)

For diameter 160<d<=250 mm
0.2% proof stress: 200 N/mm²
1% proof stress: 225 N/mm²
Tensile strength: 500-700 N/mm²
Elongation: 30% (Transv.)
Charpy notch (ISO-V): 60 J (Transv.)

Resistance to intercrystalline corrosion
In as delivered condition: Yes
In sensitised condition: Yes

0.2% Proof Stress in N/mm² vs. Temperature in ^oC

1% Proof Stress in N/mm² vs. Temperature in ^oC

Forging
Hot forming temperature: 1200-900^oC, slow cooling in air.

Machinability
Low speeds and constant feeds will minimize this alloy's tendency to work harden. Tougher than 304 stainless with a long stringy chip, the use of chip breakers is recommended.

Welding
All common fusion and resistance methods except oxyacetylene welding have proven successful. Use AWS E/ER 316L filler metal for best results.

Corrosion Resistance
Resistant to a wide variety of marine environments, salts, dilute nitric, acetic and sulfuric acids.

Cold working
Shearing, stamping, heading and drawing can be successfully performed . To remove internal stresses, a post-work annealing is recommended.