Steel Material DIN 1.4125 (X105CrMo17 / AISI 440C) Stainless Steel Round Bar

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.

Q1: What's your terms of payment?
A: 30%T/T as the upfront deposit, 70% before delivery, We will show you the photos and package before you pay the balance.
Q2: What's the terms of delivery?
A: EXW, FOB, CFR, CIF
Q3: What's the terms of packing?
A: Generally,we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirement.
Q4: What's your delivery time?
A: For stocks, we could transport the goods to loading port within 7 work days after we received the deposit.For productionperiod,it usually takes about 15 days to 30 days after we received the deposit.
Q5: Could you produce according to the samples?
A: Yes, we can customer-made by your samples or technique drawings, we can build the mold and fixtures.
Q6: Could you provide the compliment samples?
A: Yes, we could provide the free samples on condition that it is available in stocks, however,the transportation fee is borne by buyer.
Q7: How could you guarantee your products quality?
A: Each piece of products is manufactured by certified workshops, inspected by us piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.
Q8:What are the advantages of your company?
A:(1): Prime quality and reasonable price.
(2): Wide excellent experiences with after-sale service.
(3): Every process will be checked by responsible QC which insures every product's quality.
(4): Professional packing teams which keep every packing safely.
(5): Trial order can be done in one week.
(6): Samples can be provided as your requirements.