AISI 440C Stainless Steel Composition, Properties, ASTM A276 A276M

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ASTM AISI 440C Stainless Steel
A kind of knife made from AISI 440C stainless steel

ASTM 440C Stianless Steel Introduction

440C stainless steel is a kind of AISI and ASTM standard high carbon high chromium martensitic stainless steel, it has high strength, good hardness, corrosion resistance, wear resistance and high temperature dimensional stability.

AISI 440C Steel Chemical Composition

The following table shows the chemical composition of 440C stainless steel.

AISI 440C Steel Chemical Composition (%)
StandardSteel GradeCSi (≤)Mn (≤)P (≤)S (≤)CrNiCrMo (≤)
ASTM A276/A276M,
AISI
440C0.95-1.201.001.000.0400.03016.00-18.0017.00-19.000.75

Mechanical Properties of Type 440C Steel

  • Material Brinell Hardness: ≤269 HBW (hot finished); ≤285 HBW (cold finished);
  • Material Rockwell Hardness: ≥58 HRC (Heat treatment temperature: 1020℃; Quenching media: air; Section thickness of sample for testing: ≤ 9.5mm)

Equivalent Grade

AISI 440C steel equivalent to US ASTM, European Germany DIN, Britain BS, France NF… ISO, Asian Japanese JIS, and China GB standard. (For reference)

ASTM 440C stainless steel equivalent grades
USAEuropeanGermanyUKFranceISOJapanChina
StandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGrade
AISI,
ASTM A276/A276M
440CEN 10088-3X105CrMo17;
1.4125
DIN EN 10088-3X105CrMo17
(1.4125)
BS EN 10088-3X105CrMo17;
1.4125
NF EN 10088-3X105CrMo17
(1.4125)
ISO 683-17X108CrMo17JIS G4303SUS 440CGB/T 12209Cr18Mo

Applicatioins of AISI 440C Steel

AISI 440C steel is used to manufacture bearing parts working in corrosive environment, and can also be used to manufacture high quality tools (medical scalpels, scissors and blades), molds and dies, valve components, nozzles and measuring tools.

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