- Forging Materials
- Forged Shapes
- Industries We Serve
- About Us
- Sales Locations
440-C Stainless Forgings - UNS S44004
Anderson Shumaker produces the industry's best 440C stainless steel forgings in house. 440-C stainless steel is a high carbon chromium steel. Forged 440 stainless steel is designed to provide maximum hardness with stainless properties. It has been used primarily as a bearing steel, used in the hardened and tempered condition. When heat treated 440-C can be hardened to Rockwell C 60 which is the highest hardness of any stainless steel. Anderson Shumaker forges 440 stainless steel in a variety of shapes including flat and square bars, round bars, forged rings, hollows, discs, blocks and special shapes.
Applications: 440-C stainless steel was originally used in bearing assembles, including ball bearings and races. It is widely used in cutlery, valve seats, needle valves, ball valves, pump parts, bushings and textile machinery.
|Silicon||1.0%||Chromium||16.00 - 18.00%|
440C Heat Treatment & Forging Process
Annealing: typical Heat uniformly, 1550/1600f (843/871c) Soak and cool very slow in furnace, brinell hardness approximately 223. Process anneal, heat uniformly to 1350/1400 (732/760c), air cool brinell hardness aprox 255.
Before tempering make sure 440c stainless steel parts are to room temperature after hardening. This will complete the transformation of martensite, which is necessary to prevent non-uniform structures and hardness. (This alloy forges very similarly to tool steel)
Hardening: Heat 440c stainless steel to 1850/1950f (1010/1066c) soak, quench in warm oil or air cool. Do not over heat, when overheated maximum hardness cannot be obtained. Take care to minimize temperature time at 2000f (1099c) to avoid excessive grain growth. For best corrosion resistance, temper below or around 800f (427c).
Tempering: Hardened 1900 f (1038c) oil quench and tempered one hour (1” rd)
|Tempering temperature F||Tempering temperature C||Brinell Hardness|
Corrosion Resistance for 440-C Stainless Steel
The following table is for reference only, many factors can affect the corrosive resistance, a corrosion test for each application should be applied.
|Phosphoric acid||Restricted||Acetic Acid||Good|
|Salt Spray||Restricted||Nitric Acid||Moderate|
440C Typical Room Temperature Tensile Properties
|0.2% Yield Strength||Ultimate Tensile Strength||% Elongation in 2” (50.8mm)||% Reduction of area||Brinell Hardness|
- 440C machines best in the annealed condition. Because of the high carbon it machines like high speed steel. The chips will be tough and string so a chip curler or breaker should be used. If polishing, use care in the tempered condition no to overheat as hardness will be compromised. If polishing is important an individually forged product will polish best.
- Shapes Manufactured:
- Flat Bars, Square Bars, Round Bars, Forged Rings, Hollows, Discs, Blocks and special Shapes. Send us a drawing to see how we can save you material and Machining time!
The information in this data sheet is for information only and should not be used for engineering.
Contact one of our Sales Representatives today
to inquire about a quote from Anderson Shumaker
or call us today at 800-932-0357