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ATI Allegheny Ludlum Stainless Steel AL-6XN® Alloy (UNS N08367), 75% Cold Work

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 AL-6XN® Alloy (UNS N08367), 75% Cold Work.pdf
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Material Notes:
The AL-6XN® alloy is a superaustenitic stainless steel which was developed by Allegheny Ludlum Corporation. It exhibits far greater resistance to chloride pitting, crevice corrosion and stress-corrosion cracking than exhibited by the standard 300 series stainless steels, and is less costly than the traditional nickel-base corrosion resistance alloys.The AL-6XN alloy has exhibited good performance in a variety of highly corrosive environments. The AL-6XN alloy is available in a wide range of products from including plate, strip, sheet, bar, billet, tubing pipe and castings. Its various product forms are covered by ASME and ASTM specifications. The use of wrought AL-6XN products in the ASME Boiler and Pressure Vessel is covered by Code Case 1997 (latest revision) for Section VII construction and by Code Case N-438 (latest revision) for Section III construction. This use of AL-6XN castings is covered by Code Case 2106 (latest revision) for Section VIII and Code Case 497 (latest revision) for section III construction. The alloy is approved for both welded and unwelded construction under ANSI/ASME B31.1 Code Case 155. Use of AL-6XN alloy in contact with hydrogen sulfide-containing petroleum and natural gas is covered by NACE MR0175-92.Information provided by Allegheny Ludlum Corporation.
Physical Properties Metric English Comments
Density 8.06 g/cc
0.291 lb/in³
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 1370 MPa
199000 psi
Tensile Strength, Yield 1240 MPa

@Strain 0.200 %
180000 psi

@Strain 0.200 %
Elongation at Break 2.0 %
2.0 %
in 2" (50 mm)
Thermal Properties Metric English Comments
CTE, linear 15.3 µm/m-°C

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

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

@Temperature 20.0 - 200 °C
8.61 µin/in-°F

@Temperature 68.0 - 392 °F
15.7 µm/m-°C

@Temperature 20.0 - 300 °C
8.72 µin/in-°F

@Temperature 68.0 - 572 °F
16.4 µm/m-°C

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

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

@Temperature 20.0 - 800 °C
9.78 µin/in-°F

@Temperature 68.0 - 1470 °F
Thermal Conductivity 13.7 W/m-K

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

@Temperature 68.0 - 212 °F
Melting Point 1320 - 1400 °C
2410 - 2550 °F
Solidus 1320 °C
2410 °F
Liquidus 1400 °C
2550 °F
Component Elements Properties Metric English Comments
Carbon, C <= 0.030 %
<= 0.030 %
Chromium, Cr 20 - 22 %
20 - 22 %
Copper, Cu <= 0.75 %
<= 0.75 %
Iron, Fe 48 %
48 %
as balance
Manganese, Mn <= 2.0 %
<= 2.0 %
Molybdenum, Mo 6.0 - 7.0 %
6.0 - 7.0 %
Nickel, Ni 23.5 - 25.5 %
23.5 - 25.5 %
Nitrogen, N 0.18 - 0.25 %
0.18 - 0.25 %
Phosphorous, P <= 0.040 %
<= 0.040 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.030 %
<= 0.030 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000890 ohm-cm
0.0000890 ohm-cm
Magnetic Permeability 1.0028
1.0028
at 200 Oersted; before cold work
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