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ATI Allegheny Ludlum Stainless Steel Type 348 (UNS S34800)

Category Metal , Ferrous Metal , Stainless Steel , T 300 Series Stainless Steel
Manufacturer ATI Allegheny Ludlum
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF ATI Allegheny Ludlum Stainless Steel Type 348 (UNS S34800).pdf
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Material Notes:
AL 348 is a stabilized stainless steel which offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500°C. The addition of columbium and tantalum stabilize against chromium carbide formation. For nuclear applications AL 348 has restricted cobalt and tantalum content.Tensile and hardness data below per ASTM A 240 and ASME SA-240Information provided by Allegheny Ludlum Corporation.
Physical Properties Metric English Comments
Density 7.96 g/cc
0.288 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell <= 201
<= 201
plate
Hardness, Rockwell B <= 92
<= 92
sheet or strip
Tensile Strength, Ultimate >= 515 MPa
>= 74700 psi
Tensile Strength, Yield >= 205 MPa

@Strain 0.200 %
>= 29700 psi

@Strain 0.200 %
Elongation at Break >= 40 %
>= 40 %
in 2" (50 mm)
Modulus of Elasticity 193 GPa
28000 ksi
in tension
Fatigue Strength 180 MPa
26100 psi
endurance limit; test conditions not reported
Thermal Properties Metric English Comments
CTE, linear 16.6 µm/m-°C

@Temperature 20.0 - 100 °C
9.22 µin/in-°F

@Temperature 68.0 - 212 °F
18.9 µm/m-°C

@Temperature 20.0 - 600 °C
10.5 µin/in-°F

@Temperature 68.0 - 1110 °F
20.5 µm/m-°C

@Temperature 20.0 - 1000 °C
11.4 µin/in-°F

@Temperature 68.0 - 1830 °F
Specific Heat Capacity 0.500 J/g-°C
0.120 BTU/lb-°F
Thermal Conductivity 16.3 W/m-K

@Temperature 20.0 - 100 °C
113 BTU-in/hr-ft²-°F

@Temperature 68.0 - 212 °F
Melting Point 1398 - 1446 °C
2548 - 2635 °F
Solidus 1398 °C
2548 °F
Liquidus 1446 °C
2635 °F
Maximum Service Temperature, Air 816 °C
1500 °F
good for prolonged service
Component Elements Properties Metric English Comments
Carbon, C <= 0.080 %
<= 0.080 %
Chromium, Cr 17 - 19 %
17 - 19 %
Cobalt, Co <= 0.20 %
<= 0.20 %
Iron, Fe 70 %
70 %
as balance
Manganese, Mn <= 2.0 %
<= 2.0 %
Nb + Ta <= 1.0 %
<= 1.0 %
Nickel, Ni 9.0 - 13 %
9.0 - 13 %
Phosphorous, P <= 0.045 %
<= 0.045 %
Silicon, Si <= 0.75 %
<= 0.75 %
Sulfur, S <= 0.030 %
<= 0.030 %
Tantalum, Ta <= 0.10 %
<= 0.10 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000720 ohm-cm
0.0000720 ohm-cm
Magnetic Permeability <= 1.02
<= 1.02
typically < 1.02 at 200H; increases with cold work.
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