17-4 Stainless Steel

Great Lakes Forge provides a full range of custom forging capabilities for 17-4 stainless steel. We can provide forgings up to 6,000 lbs., from 2.5" to 24" in diameter/thickness, and up to 12' in length. We can create a variety of custom forges including:

With the industry's fastest turnaround times, our forging services are ideal for high or low volume production, as well as prototyping.

We offer numerous milling and rough turning capabilities to deliver products that are as close as possible to the desired size and shape, at a reasonable cost. Our in-house machine shop, quality-controlled heat-treating processes, and various testing capabilities help us ensure the quality, consistency, and dimensional accuracy of our custom forged parts.

In addition to 17-4 stainless steel Great Lakes Forge has the capabilities to forge over 200 different materials. If your project requires a specific grade of steel, please don't hesitate to contact us. The material you need may be in our inventory, and if it isn't, close relationships with our material providers enable us to procure the material you need quickly and cost-effectively. 

17-4 Stainless Steel Properties

17-4 stainless steel is a martensitic precipitation/age-hardening material with many quality characteristics including:

  • High Strength
  • High Hardness
  • High Fatigue Strength
  • Good Galling & Stress Corrosion Resistance
  • Exceptional Oxidation Resistance (up to 1100°F/593°C)
  • Excellent Corrosion Resistance (comparable to chromium nickel grades)

17-4 Stainless Steel Composition

Element % Content
 Carbon  0.07 (max.)
 Chromium  15.00 to 17.50
 Columbium + Tantalum 
 0.15 to 0.45
 Copper  3.00 to 5.00
 Manganese  1.00 (max.)
 Nickel  3.00 to 5.00
 Phosphorous  0.040 (max.)
 Silicon  1.00 (max.)
 Sulfur  0.030 (max.)
 Iron  balance

17-4 Stainless Steel Hardness

Tempered 17-4 stainless steel can reach Brinell scale hardness of up to 388, and Rockwell hardness of up to C40.

17-4 Stainless Steel Heat Treatment

17-4 stainless steel is often hardened by heating solution-treated material to temperatures from 900°F/482°C to 1150°F/621°C for one to four hours. The material must then be air cooled to below 90°F/32°C to allow for complete transformation to martensite.

17-4 Stainless Steel Machinability

17-4 stainless steel is readily machined in both solution-treated (condition A) and in the precipitation hardened condition. For annealed 17-4 stainless steel, surface cutting speed averages 80 ft/min.

Contact Great Lakes Forge today for your 17-4 stainless steel forgings

Request a quote today or contact us for more information.


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