Allegheny Ludlum Stainless Steel AL-6XN® Alloy (UNS N08367)

Delta Fastener Corp. can provide a wide variety of AL-6XN fasteners including; AL-6XN nuts, AL-6XN bolts, sockets, washers and more in AL-6XN fasteners. If we do not have your AL-6XN fasteners in stock (Inch or Metric) we can have these manufactured to your specification.

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 PropertiesMetricEnglishComments
Density8.06 g/cc0.291 lb/in³
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell185185
Hardness, Rockwell B9090
Tensile Strength, Ultimate760 MPa110000 psi
Tensile Strength, Yield380 MPa55100 psi
Elongation at Break45.0 %45.0 %
Reduction of Area60.0 %60.0 %
Charpy Impact190 J140 ft-lbV-notch
Electrical PropertiesMetricEnglishComments
Electrical Resistivity0.0000890 ohm-cm0.0000890 ohm-cm
Magnetic Permeability1.00281.0028at 200 Oersted
Thermal PropertiesMetricEnglishComments
CTE, linear15.3 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 Conductivity13.7 W/m-K
@Temperature 20.0 - 100 °C
95.1 BTU-in/hr-ft²-°F
@Temperature 68.0 - 212 °F
Melting Point1320 - 1400 °C2410 - 2550 °F
Solidus1320 °C2410 °F
Liquidus1400 °C2550 °F
Component Elements PropertiesMetricEnglishComments
Carbon, C<= 0.030 %<= 0.030 %
Chromium, Cr20.0 - 22.0 %20.0 - 22.0 %
Copper, Cu<= 0.75 %<= 0.75 %
Iron, Fe48.0 %48.0 %as balance
Manganese, Mn<= 2.0 %<= 2.0 %
Molybdenum, Mo6.0 - 7.0 %6.0 - 7.0 %
Nickel, Ni23.5 - 25.5 %23.5 - 25.5 %
Nitrogen, N0.18 - 0.25 %0.18 - 0.25 %
Phosphorous, P<= 0.040 %<= 0.040 %
Silicon, Si<= 1.0 %<= 1.0 %
Sulfur, S<= 0.030 %<= 0.030 %

Information provided by MatWeb

Disclaimer: The dimensions listed are for reference only. Sizes not listed may be available off the shelf or can be manufactured to customer requirements.