{"id":534,"date":"2026-02-24T08:36:29","date_gmt":"2026-02-24T08:36:29","guid":{"rendered":"https:\/\/www.jccncmachining.com\/material\/\/"},"modified":"2026-02-24T08:36:29","modified_gmt":"2026-02-24T08:36:29","slug":"stainless-steel-440c","status":"publish","type":"material_model","link":"https:\/\/www.jccncmachining.com\/es\/materials\/stainless-steel\/stainless-steel-440c\/","title":{"rendered":"Stainless Steel 440C"},"content":{"rendered":"

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SS 440C Machining Capabilities<\/h3>\n\n\n\n\n\n\n\n\n
Capability<\/th>\nTechnical Description<\/th>\nJucheng Advantage<\/th>\n<\/tr>\n<\/thead>\n
Hard Turning<\/strong><\/td>\nTurning 440C in its fully hardened state (58-60 HRC) using PCBN (Polycrystalline Cubic Boron Nitride) inserts.<\/td>\nEliminates the need for grinding on some geometries, reducing cost while maintaining tight tolerances (+\/- 0.005mm).<\/td>\n<\/tr>\n
Bearing-Grade Grinding<\/strong><\/td>\nPrecision ID\/OD grinding to achieve roundness and concentricity within 1 micron.<\/td>\nWe produce custom bearing races and rollers that meet ABEC dimensional standards.<\/td>\n<\/tr>\n
Cryogenic Treatment<\/strong><\/td>\nDeep freezing parts after heat treatment to convert retained austenite to martensite.<\/td>\nEnsures maximum dimensional stability and hardness for parts used in precision metrology or aerospace.<\/td>\n<\/tr>\n
Superfinishing<\/strong><\/td>\nPolishing ground surfaces to Ra 0.05\u00b5m to reduce friction and wear.<\/td>\nEssential for high-speed shafts and valve seats to prevent seizing and extend service life.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Fabrication Guidelines for Stainless 440C<\/h3>\n

Annealed vs. Hardened:<\/strong>
\nWe machine the general shape in the annealed condition (easy to cut) and finish-grind after heat treatment. Tip:<\/strong> Always leave 0.3mm – 0.5mm grinding stock to remove heat-treat distortion.<\/p>\n

Corrosion Resistance:<\/strong>
\n440C has better corrosion resistance than tool steels (like D2) but worse than 304. Tip:<\/strong> Ideally suited for applications involving mild moisture or lubricants, but not saltwater immersion.<\/p>\n

Brittleness:<\/strong>
\nAt 60 HRC, 440C is very hard but brittle. Tip:<\/strong> Avoid thin, unsupported walls or sharp internal corners which can crack during quenching.<\/p>\n<\/div>\n

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Primary Applications<\/h3>\n

Rolling Element Bearings<\/strong>
\nBalls, rollers, and races. 440C is the standard for corrosion-resistant bearings.<\/p>\n

Valve Components<\/strong>
\nHigh-pressure valve seats and needle tips that must seal perfectly and resist erosion from fluid flow.<\/p>\n

Mold Inserts<\/strong>
\nSmall, high-wear cores in plastic injection molds, especially for abrasive glass-filled plastics.<\/p>\n

High-End Cutlery<\/strong>
\nPremium knife blades and surgical shears requiring the ultimate razor edge retention.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

SS 440C Machining Capabilities Capability Technical Description Jucheng Advantage Hard Turning Turning 440C in its fully hardened state (58-60 HRC) using PCBN (Polycrystalline Cubic Boron Nitride) inserts. Eliminates the need for grinding on some geometries, reducing cost while maintaining tight tolerances (+\/- 0.005mm). Bearing-Grade Grinding Precision ID\/OD grinding to achieve roundness and concentricity within 1 […]<\/p>\n","protected":false},"featured_media":535,"template":"","meta":[],"class_list":["post-534","material_model","type-material_model","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.jccncmachining.com\/es\/wp-json\/wp\/v2\/material_model\/534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jccncmachining.com\/es\/wp-json\/wp\/v2\/material_model"}],"about":[{"href":"https:\/\/www.jccncmachining.com\/es\/wp-json\/wp\/v2\/types\/material_model"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/es\/wp-json\/wp\/v2\/media\/535"}],"wp:attachment":[{"href":"https:\/\/www.jccncmachining.com\/es\/wp-json\/wp\/v2\/media?parent=534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}