{"id":520,"date":"2026-02-24T07:31:14","date_gmt":"2026-02-24T07:31:14","guid":{"rendered":"https:\/\/www.jccncmachining.com\/material\/\/"},"modified":"2026-02-24T07:31:14","modified_gmt":"2026-02-24T07:31:14","slug":"stainless-steel-303","status":"publish","type":"material_model","link":"https:\/\/www.jccncmachining.com\/ja\/materials\/stainless-steel\/stainless-steel-303\/","title":{"rendered":"Stainless Steel 303"},"content":{"rendered":"

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SS 303 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
High-Speed Swiss Turning<\/strong><\/td>\nSS 303 contains sulfur, which acts as a chip breaker. This allows for extremely fast turning speeds compared to 304.<\/td>\nOur Swiss lathes can run 303 parts 24\/7 with minimal tool wear, offering the lowest unit cost for stainless components.<\/td>\n<\/tr>\n
Complex Knurling<\/strong><\/td>\nThe material’s machinability makes it excellent for forming or cutting diamond knurls without flaking.<\/td>\nWe produce tactile knobs and grip surfaces with crisp, defined patterns that are visually perfect.<\/td>\n<\/tr>\n
Precision Threading<\/strong><\/td>\nTapping and single-point threading are smooth and burr-free due to the brittleness of the chips.<\/td>\nIdeal for manufacturing standoffs, inserts, and custom screws with tight thread tolerances (6g\/6H).<\/td>\n<\/tr>\n
Deep Hole Drilling<\/strong><\/td>\nDrilling deep bores is significantly easier in 303 than 304, as chips evacuate easily without jamming.<\/td>\nWe can drill high aspect ratio holes for fluid nozzles and sensor housings efficiently.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Fabrication Guidelines for Stainless 303<\/h3>\n

Corrosion Trade-off:<\/strong>
\nThe added sulfur improves machinability but lowers corrosion resistance compared to 304. Tip:<\/strong> Do not use 303 for marine environments or pressurized gas containment where micro-porosity from sulfur could be an issue.<\/p>\n

Do Not Weld:<\/strong>
\n303 is generally considered non-weldable<\/strong>. The sulfur content causes “hot cracking” during welding. Tip:<\/strong> Design assemblies to be bolted or pressed, not welded.<\/p>\n

Passivation Care:<\/strong>
\nPassivating 303 requires careful chemistry control (often Citric acid based) to avoid etching the sulfur inclusions, which can turn the part black (“frosting”).<\/p>\n<\/div>\n

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Primary Applications<\/h3>\n

Fasteners & Hardware<\/strong>
\nNuts, bolts, screws, and standoffs that require the look and feel of stainless but need to be produced cheaply in high volumes.<\/p>\n

Electrical Components<\/strong>
\nConnectors, terminals, and switchgear housings where non-magnetic properties (annealed) and precision are needed.<\/p>\n

Industrial Bushings<\/strong>
\nMoving parts requiring decent wear resistance and preventing seizing (galling) which is more common in 304\/316.<\/p>\n

Automotive fittings<\/strong>
\nSensor bodies and interior trim parts that are not exposed to road salt.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

SS 303 Machining Capabilities Capability Technical Description Jucheng Advantage High-Speed Swiss Turning SS 303 contains sulfur, which acts as a chip breaker. This allows for extremely fast turning speeds compared to 304. Our Swiss lathes can run 303 parts 24\/7 with minimal tool wear, offering the lowest unit cost for stainless components. Complex Knurling The material’s machinability makes it excellent for forming or cutting diamond knurls without flaking. We produce tactile knobs and grip surfaces with crisp, defined patterns that are visually perfect. Precision Threading Tapping and single-point threading are smooth and burr-free due to the brittleness of the chips. Ideal for manufacturing standoffs, inserts, and custom screws with tight […]<\/p>\n","protected":false},"featured_media":521,"template":"","meta":[],"class_list":["post-520","material_model","type-material_model","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.jccncmachining.com\/ja\/wp-json\/wp\/v2\/material_model\/520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jccncmachining.com\/ja\/wp-json\/wp\/v2\/material_model"}],"about":[{"href":"https:\/\/www.jccncmachining.com\/ja\/wp-json\/wp\/v2\/types\/material_model"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ja\/wp-json\/wp\/v2\/media\/521"}],"wp:attachment":[{"href":"https:\/\/www.jccncmachining.com\/ja\/wp-json\/wp\/v2\/media?parent=520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}