ASTM A276 S44004/440C X105CrMo17/1.4125 EN 10088 Forged Stainless Steel Round Bar OD 250MM

AISI 440C is a high-carbon chromium steel designed to provide stainless properties with maximum hardness. It has been used primarily as a bearing steel, and is used in the hardened plus tempered condition. When heat-treated, Type 440C attains the highest hardness of any stainless steel (about Rockwell C 60).

Typical applications are bearing assemblies, including bearing balls and races. In addition, it should be considered for cutlery, needle valves, ball check valves, valve seats, pump parts, ball studs, bushings, and wear-resistant textile component

Supply Range for 440C Stainless Steel

440C steel round bar: diameter 1mm～400mm

440C stainless plate: 0.1-100 thickness x 500-2000mm width x 1000-6000mm length

Other steel shape, like 440c steel sheet, 440C coil, flat bar and customized sizes are available against request

2. Standard of 440C Stainless Steel and Equivalent Steel Grades

3. ASTM A276 440C Steel Chemical Composition and Equivalent’s

4. ASTM 440C Stainless Steel Mechanical Properties

• Physical Properties

5. Forging of 440C Stainless Steel

Preheat to 760oC – 820oC, then heat slowly and uniformly to 1050oC – 1150oC, hold until temperature is uniform throughout the 440c steel section and commence forging immediately. Do not overheat 440c stainless steel as this can cause a loss of toughness and ductility. Do not forge below 900oC. Finished forgings of SS 440c should be cooled slowly in a furnace, warm dry lime or ashes to room temperature and annealed immediately. Air cooling after forging may cause cracking of steel 440c.

6. Machinability of 440C Steel

ASTM Grade 440C stainless steel can be machined well, with all operations such as turning and drilling etc., in the annealed condition. Because of 440C SS high carbon content it machines somewhat like high-speed steel. Because chips are tough and stringy, chip curlers and breakers are important.

As heat treated, the 440 steel series are difficult to machine because of their high hardness. For parts that require extensive machining, the free-machining versions, Type 440F or Type 440F Se, offer improved machining properties.

Q:Are you trading company or manufacturer ?
A: We are professional manufacturer for stainless steel.

Q: Will you delivery the goods on time?
A: Yes, we promise to provide best quality products and delivery on time. Honesty is our company's tenet

Q: Do you provide samples? Is it free or extra?
A: The sample could can provide for customer with free, but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?
A: Yes, absolutely we accept.

Q: Will stainless steel rods be packed in wooden boxes during transportation?
A: In order to ensure the accurate straightness of stainless steel rods, we will only pack in wooden boxes according to customer requirements.

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A: The email and fax will be checked within 12 hours, meanwhile, the Wechat and WhatsApp will be online in 24 hour. Please send us your requirement and order information(stainless steel material, size, quantity, destination port), we will work out a best price soon.