Stainless Steel Grade 13-8 (UNS S13800)

Stainless steel is an alloy of Iron, carbon and other elements. It is characterized by its high corrosion resistance. Unlike common steel, stainless steel is more durable and does not rust. The large amount of chromium content makes it rust-resistant. Based on the chemical composition of stainless steel, it is characterized into different grades. Let us explore one of the most durable stainless steel grades - UNS S13800.

About Grade 13-8 Stainless Steel

Grade 13-8 Stainless Steel is an age-hardened stainless steel. It is characterized by its stress-related corrosion resistance, high strength and capability to bear large forces without rupturing. It is also very tough and strong. 

Chemical Composition of Grade 13-8

Grade 13-8 stainless steel is composed of several elements providing it with its magnificent properties. The chemical composition of Grade 13-8 is as follows:

Iron, Fe  

76%

Chromium, Cr

12.25-13.25%

Nickel, Ni

7.50-8.50%

Molybdenum, Mo

2.0-2.50%

Aluminium, Al

0.90-1.35%

Manganese, Mn

0.10%

Silicon, Si

0.10%

Carbon, C

0.05%

Nitrogen, N 

0.01%

Phosphorous, P

0.01%

Sulphur, S

0.01%

Physical Properties of Grade 13-8 Stainless Steel

Grade 13-8 stainless steel has a density of 7.80 grams per cubic centimetre (g/cm³). 

Mechanical Properties of Grade 13-8 Stainless Steel

The mechanical properties describe how the steel reacts to various forces. The following are the main mechanical properties of Stainless Steel grade 13-8:

Tensile strength

1620 MPa

Yield strength (@ 0.200% strain)

1480 MPa

Elastic modulus

203 GPa

Poisson's ratio

0.27-0.30

Elongation at break (in 50 mm)

12.00%

Charpy Impact

27.0 J

 

Thermal Properties of Grade 13-8 Stainless Steel

The thermal properties describe the reaction of the steel to changes in temperature. Grade 13-8 Stainless Steel has the following thermal properties:

 

Coefficient of thermal expansion (@ 21-95°C/69.8-203°F)

10.6 µm/m°C

Thermal conductivity (in condition A, @ 100°C/212°F)

14.0 W/mK

Applications of Grade 13-8 Stainless Steel

This special stainless steel has many applications due to its high strength and corrosion resistance. Here are some common applications of grade 13-8 stainless steel:

  • Nuclear industry
  • Petrochemical industry
  • Aircraft parts

 

Grade 13-8 stainless steel is a multi-application and high-strength alloy. The combination of its unique properties makes it excellent for various applications. It is also suitable for applications demanding rigorous environments where strength and resistance to corrosion are required