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BAIJIAXIUSHANG-TIES High Speed S51107 Stainless Steel Thrust Bal

$39

BAIJIAXIUSHANG-TIES High Speed S51107 Stainless Steel Thrust Bal

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Product description

WHY 440C STAINLESS steel?

Good corrosion resistance to water and many weak chemicals
Corrosion resistance can be improved by passivation
Good for temperatures up to 300°C

Slightly softer than chrome steel so lower load ratings
Will corrode in salt water or salt spray and poor resistance to acids/alkalis
More expensive than chrome steel

TECHNICAL SPECS

Item: S51107
Structure: Deep Groove
Material: 440C Stainless Steel ( prefix "S" )
Bore Dia (d): 35 mm
Outer Dia (D): 52 mm
Magnetic: little
Hardness: 58HRC
Corrosion Resistance: General
Clearance: C0
Grades: ABEC Grades 1
Static Load Rating (Cor) (Newtons): 6216
Dynamic Load Rating (Cr) (Newtons): 10696
Weight: 58.1 g
Quantity: 1 Lot = 2 PCS

What is 440C?

A martensitic stainless steel. It's composed of these major alloy elements (I don't list the minor elements since they don't play a major role):
Carbon: 0.95-1.25% This increases hardenability and wear resistance, but decreases toughness in higher amounts.
Manganese: 45% This is added to reduce brittleness and improve forgeability, hardenability, and reducing deformation.
Silicon: 30% This is a deoxidizer and improves hot-forming properties.
Chromium: 17.00-18.00% Added only to high alloy tool steels, this improves hardenability, high wear resistance, toughness, and corrosion resistance.
Molybdenum: 50% Improves deep hardening and toughness.

These basic elements (along with iron) are a simple combination that works well together, and has for many decades.
This alloy is technically classified as UNS (Unified Numbering System) S44044. It's also classified as SAE (Society for Automotive Engineers) as 51440C.
The American Iron and Steel Institute classifies it as 440C martensitic standard stainless steel. Most modern knifemakers simply call it 440C.

BAIJIAXIUSHANG-TIES High Speed S51107 Stainless Steel Thrust Bal

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BMJ Open Respiratory Research is a peer-reviewed, open access journal publishing high quality papers across all areas of respiratory medicine, critical care and sleep medicine. The journal focuses on robustness of methodology and scientific rigour with less emphasis on novelty or perceived impact. It is indexed in MEDLINE, PubMed Central, Scopus and Web of Science (Emerging Sources Citation Index).

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