ASTM A240 Grade 304LN Heat-Treated

TAGS: steel | stainless steel plate | ASTM A240 | 304LN |

ASTM A240 Grade 304LN Heat-Treated refers to a specific heat-treated variant of stainless steel grade 304LN as per the ASTM A240 standard.

Grade 304LN is an austenitic stainless steel with low carbon content, which offers excellent corrosion resistance and good mechanical properties. The "LN" in the grade designation stands for "low nitrogen," indicating reduced nitrogen content compared to standard grade 304.

The heat treatment process applied to ASTM A240 Grade 304LN involves subjecting the material to controlled heating and cooling conditions to modify its microstructure and enhance certain properties. Heat treatment can improve the material's strength, hardness, and other mechanical characteristics based on specific requirements.

Property

Temperature

Value

Comment

Density

23.0 °C

7.9 - 8.2 g/cm³

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Typical for Austenitic Stainless Steel

Property

Temperature

Value

Comment

Elastic modulus

23.0 °C

195 GPa

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Typical for Austenitic Stainless Steel

Elongation A50

23.0 °C

40 %

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Hardness, Brinell

23.0 °C

217 [-]

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Hardness, Rockwell B

23.0 °C

95 [-]

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Poisson's ratio

23.0 °C

0.3 [-]

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Typical for Austenitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

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Typical for Austenitic Stainless Steel

Tensile strength

23.0 °C

515 MPa

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Yield strength Rp0.2

23.0 °C

205 MPa

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Yield strength Rp1.0

23.0 °C

310 MPa

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Property

Temperature

Value

Comment

Coefficient of thermal expansion

23.0 °C

1.7E-5 - 1.9E-5 1/K

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Typical for Austenitic Stainless Steel

Melting point

1230 - 1480 °C

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Typical for Austenitic Stainless Steel

Specific heat capacity

23.0 °C

440 J/(kg·K)

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Typical for Austenitic Stainless Steel

Thermal conductivity

23.0 °C

11 - 21 W/(m·K)

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Typical for Austenitic Stainless Steel

Property

Temperature

Value

Comment

Electrical resistivity

23.0 °C

8.5E-7 Ω·m

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Typical for Austenitic Stainless Steel

Property

Value

Carbon

0.03 %

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Chromium

18 - 20 %

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Manganese

2 %

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Nickel

8 - 12 %

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Nitrogen

0.1 - 0.16 %

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Phosphorus

0.05 %

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Silicon

0.75 %

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Sulfur

0.03 %

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