Stainless steels are high-alloy steels which have high corrosion resistance compared to other steels due to the presence of large amounts of chromium. Based on their crystalline structure, they are divided into three types such as ferritic, austenitic, and martensitic steels. Another group of stainless steels are precipitation-hardened steels. They are a combination of martensitic and austenitic steels. Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.

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Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.

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Composition
Chemical Composition ranges of 440C stainless steel

Grade440C
Ingredients	Min.	Max.
Carbon	0.95	1.20
Manganese	–	1.00
Silicon	–	1.00
Phosphorus	–	0.040
Sulphur	–	0.030
Chromium	16.00	18.00
Molybdenum	–	0.75
Iron	Balance

440C Physical Properties
Physical properties for grade 440 stainless steels.

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (mm/m/C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100C (J/kg.K)	Electrical Resistivity (nW.m)
			0-100C	0-200C	0-600C	at 100C	at 500C
440A/B/C	7650	200	10.1	10.3	11.7	24.2	–	460	600

440C Related Specifications

USA	Germany	Japan	Australia
ASTM A276-98b 440C SAE 51440C AISI 440C UNS S44004	W.Nr 1.4125 X105CrMo17	JIS G4303 SuS 440C	AS 2837-1986 440C

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Shandong Chengshun Metal Materials Co., Ltd. is located in Jinan City, Shandong Province. It is a comprehensive company dealing in high-quality steel products, with a superior geographical location and very convenient transportation. The company has a complete and scientific quality system, and has been recognized by the industry for its integrity, strength and product quality.

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Mainly exported to Europe, Southeast Asia, South Africa, the Middle East, Latin America and other countries and regions, the products are favored by Chinese and foreign users.

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Stainless Steel Plate