Technical center

314/1.4841/X15CrNiSi25-20


Introduction

Stainless steel grade 314 has excellent high-temperature resistance characteristics among the chromium-nickel steels series. The silicon content in this material improves oxidation and carburization resistance; however, it can become very brittle when subjected to prolonged temperatures of 649-816°C (1200- 1500°F).

The following datasheet provides an overview of stainless-steel grade 314.


Chemical Composition

C Max:0.25%;

Mn Max:2.00%;

P Max:0.045%;

S Max:0.030%;

Si:Max:1.50-3.00%;

Cr:23.00-26.00%;

Ni:19.00-22.00%。


Mechanical Properties

Tensile strength

689 MPa

99900 psi

Yield strength

345 MPa

50000 psi

Modulus of elasticity

200 GPa

29000 ksi

Elongation at break (in 50 mm)

40%

40%

Hardness, Rockwell B

85

85

Manufacturing Process

Stainless steel grade 314 can be heat treated by annealing the material at 1038-1149°C (1900-2100°F), and then quenching in water or rapidly air cooling. Grade 314 steel can be hardened only through cold working. To perform machinability of grade 314, coolant and high-speed turning tools are recommended.

After slowly heating the material to 871°C (1600°F), it should be thoroughly soaked, and then followed by quickly heating to 1093 -1232°C (2000-2250°F) , to perform forging, flanging, or working.


APPLICATIONS

High-Temperature applications

Furnace parts 

Furnace conveyor systems

Heat Exchangers