309s stainless steel strip vs 310s stainless steel strip

What’s The Difference Between 309S And 310S Stainless Steel Strip?

309S and 310S stainless steel strips are common products used in various industries across the globe.

The difference between 309s and 310s stainless steel strip is exactly the same as the difference between other types of stainless steel.

This blog post will explain what grade of stainless steel these two materials are and how they differ from each other.

Let’s keep reading.

309s stainless steel strip

309S stainless steel strip is austenitic chromium-nickel stainless steel that provides excellent corrosion resistance and heat resistance for many important applications.

309S stainless steel strip has high chromium and low nickel content, It can be utilized in sulfur containing atmospheres up to 1000 degree.

What is 310S Stainless Steel Strip?

310s stainless steel strip

310S stainless steel strip is austenitic chromium-nickel stainless steel with good oxidation resistance and resistance, corrosion and high temperature resistance.

Because of the higher percentage of chromium and nickel, it has much better strength, can work continuously at high temperature, and has good high temperature resistance.

It also has good oxidation resistance, corrosion resistance, acid and alkali resistance, and high temperature resistance.

310S stainless steel strips are specially used to manufacture electric furnace tubes. The austenitic stainless steel adds carbon content, the strength is improved due to its solid solution strengthening effect.
Therefore, it has high strength at high temperature. The melting point is 1470℃, and it starts to soften at 800℃, and the allowable stress continues to decrease.

Differences Between 309S Stainless Steel Strips and 310S Stainless Steel Strips

Chemical Composition

The chemical components of grade 309S stainless steel strip is summarized in the following table:

GradeStandardCSiMnPSCrNiMo
309SASTM A240≤0.08≤1.00≤2.00≤0.045≤0.03022.00-24.0012.00-15.00

The chemical components of grade 310S stainless steel strip is summarized in the following table:

GradeStandardCSiMnPSCrNiMo
310SASTM A240≤0.08≤1.500≤2.00≤0.035≤0.03024.00-26.0019.00-22.00

Mechanical Properties

309S Stainless Steel Strip Mechanical Properties

GradeTensile Strength ksi (min)Yield Strength 0.2% ksi (min)Elongation %Hardness (Brinell) Max
309S403040217

310S Stainless Steel Strip Mechanical Properties

PropertyGrade 310S
Yield Strength, min. (ksi)30
Tensile Strength, min. (ksi)75
Elongation, min. (%)40
Hardness, max. (Rb)95

Applications

What Is 309S Stainless Steel Strip Used For?

  1. Furnaces
  2. Fluidized Bed Furnaces
  3. Paper Mill Equipment
  4. Catalytic recovery systems and recuperators
  5. Pulverized coal burners and tube hangers
  6. Annealing covers and boxes
  7. Incinerators, rotary kilns and calciners

What Is 310S Stainless Steel Strip Used For?

  • Fluidized bed coal combustors
  • Radiant welding tubes
  • Tube hangers for petroleum refining and steam boilers
  • Coal gasifier internal components
  • Thermowells and refractory components
  • Burners, combustion chambers
  • Retorts, muffles, annealing covers
  • Cryogenic structures