310-sheetAlloy 310 (UNS S31000) is an austenitic stainless steel developed for use in high temperature corrosion resistant applications. The alloy resists oxidation up to 2010oF (1100oC) under mildly cyclic conditions.Because of its high chromium and moderate nickel content, Alloy 310 is resistant to sulfidation and can also be used in moderately carburizing atmospheres.

310S (UNS S31008) is the low carbon version of the alloy. It is utilized for ease of fabrication. 310H (UNS S31009) is a high carbon modification developed for enhanced creep resistance. In most instances the grain size and carbon content of the plate can meet both the 310S and 310H requirements.Containing a high content of Nickel and Chromium 310 has good corrosion resistance, excellent resistance to oxidation and strength up to 2100 degrees F.

 

  Specification : Alloy 310/310S/310H (UNS S31000, S31008, S31009) W. Nr. 1.4845

 

Standards

 

ASTM.
A 240
ASME.
SA 240
AMS
5511/5513
QQ-S
766

 

Chemical Analysis

Weight % (all values are maximum unless a range is otherwise indicated)

 

 310 UNS S31000 Chemical Composition, %

Cr

Ni

C

Si

Mn

24.0-26.0

19.2-22.0

.25 Max

1.50 Max

2.00 Max

P

S

Mo

Cu

Fe

.045 Max

.03 Max

.75 Max

.50 Max

Balance

 

310S UNS S31008 Chemical Composition, %

Cr

Ni

C

Si

Mn

24.0-26.0

19.2-22.0

.08 Max

1.50 Max

2.00 Max

P

S

Mo

Cu

Fe

.045 Max

.03 Max

.75 Max

.50 Max

Balance

Physical Properties of Ferritic Stainless Steel

 

rade

Density (kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Specific Heat 0-100°C (J/kg.K)

Electrical Resistivity (nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

310/S

7750

200

15.9

16.2

17.0

14.2

18.7

500

720

 

Mechanical Properties

 

Temperature, °F

Ultimate Tensile Strength, ksi

.2% Yield Strength, ksi

Elongation Percent

70

80.0

35.0

52

1000

67.8

20.8

47

1200

54.1

20.7

43

1400

35.1

19.3

46

1600

19.1

12.2

48

Corrosion Resistance

Weight Corrosion

Alloy 310 is not designed for service in wet corrosive environments. The high carbon content, which is present to enhance creep properties, has a detrimental effect on aqueous corrosion resistance. The alloy is prone to intergranular corrosion after long term exposure at high temperatures. However, due to its high chromium content (25%), Alloy 310 is more corrosion resistant than most heat resistant alloys.

 

High Temperature Corrosion

The high chromium (25%) and silicon (0.6%) content of Alloy 310 make it more resistant to high temperature corrosion in most in-service environments. Operating temperatures are listed below.

Oxidizing conditions (max sulfur content – 2 g/m3)

  • 1922°F (1050°C) continuous service
  • 2012°F (1100°C) peak temperature

Oxidizing conditions (max sulfur greater than 2 g/m3)

  • 1742°F (950°C) maximum temperature

Low oxygen atmosphere (max sulfur content – 2 g/m3)

  • 1832°F (1000°C) maximum temperature

Nitriding or carburizing atmospheres

  • 1562 – 1742°F (850 – 950°C) maximum

Alloy 310 can be readily welded by most standard processes including TIG, PLASMA, MIG, SMAW, SAW and FCAW.Alloy 310 can be easily welded and processed by standard shop fabrication practices.

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