Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated AMS 5548, ASTM A693, MIL S 8840

AM 350 Alloy Description

AM 350® is a precipitation hardening chromium-nickel-molybdenum alloy. AM 350® brings together the strength of heat treatable martensitic grades with the corrosion resistance of some of the chromium nickel austenitic grades. Generally used in applications under 1000°F where a combination of strength and good corrosion resistance are required.


Industrial cutters and knives
Gas turbine components

Chemistry Typical

Carbon: 0.07- 0.11
Manganese: 0.50-1.25
Chromium: 16.00-17.00
Nickel: 4.00-5.00
Molybdenum: 2.50-3.25
Nitrogen: 0.07-0.13
Silicon: 0.50 max
Phosphorus: 0.040 max
Sulfur: 0.030 max

Physical Properties

Density (annealed): 0.287 lb/in.³, 7.94 g/cm³

Thermal Conductivity: BTU/hr/ft²/ft/°F,(W/m•K)
At 200ºF (93ºC): 6.0 (11.3)
At 600°F (316°C): 6.5 (12.2)
At 800ºF (427ºC): 6.8 (12.6)
At 1000ºF (538ºC): 6.97 (13.0)

Mean Coefficient of Thermal Expansion: in/in/°F (μm/m•K)
70-200°F (21-93°C): 9.17 x 10 (16.5)
70-600°F (21-315°C): 9.47x 10 (17.0)
70-800°F (21-427°C): 9.64x 10 (17.4)
70-1000ºF(21-538ºC): 9.78x 10 (17.6)

Modulus of Elasticity: KSI (MPa)
27.5-30.4 x 10³ (190-210 x 10³) in tension

Mechanical Properties at Room Temperature

Annealed Typical:

Ultimate Tensile Strength: 200 KSI max (1380 MPa max)
Yield Strength: (0.2% offset) 85 KSI max (585 MPa max)
8% min: gauges < 0.010 inches
12% min: gauges > 0.010 inches
Hardness: Rc 30 max


AM350 is not supplied tempered.

Heat Treated Properties

Typical 850°F
Ultimate Tensile Strength: 185 KSI min (1275 MPa min)
Yield Strength: (0.2% offset) 145 KSI min (1000 MPa min)
2% min: gauges 0.0005-0.0015 inches
4% min: >0.0015-0.002 inches
6% min: >0.002-0.010 inches
8% min: > 0.010 inches

Typical 1000°F
Ultimate Tensile Strength: 165 KSI min (1140 MPa min)
Yield Strength: (0.2% offset) 150 KSI min (1035 MPa min)
2% min: gauges 0.0005-0.0015 inches
4% min: > 0.0015-0.002 inches
6% min: > 0.002-0.010 inches
8% min: > 0.010 inches

Additional Properties

Corrosion Resistance

Alloy AM 350® has a similar corrosion as some of the austenitic stainless steels. See NACE (National Association of Corrosion Engineers) for more information

Standard Wire Finishes

Extra Clean: Extra clean is also referred to as “bright annealed” or “bright annealed and cold

Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications

Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation. A soap finish is available in tempered products.

Plated: Many plating options are available.
*Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
AM 350® is a registered trademark of Allegheny Technologies Inc (ATI)

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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