440C/1.4125/X105CrMo17/S44004 | Martensite Stainless Steel

440C

1.4125, S44004, SUS 440C

SpecificationDIN EN 10088, ASTM A276/A276M, ASTM A473, JIS G4303

It is a high carbon, chromium Martensite stainless steel. After heat treatment, it has the highest hardness among all stainless steels.

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Introduction
Specifications

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Introduction

Product properties

˙High strength

˙Moderate corrosion resistance

˙Good strength

˙High wear resistance

Industrial Applications

˙Size block

˙Ball bearing

˙Mold

˙Cutting tool

˙Bearing race

˙Measurement instruments

Specifications

Chemical composition (wt. %)

Element

Min.

0.95

16.00

0.40

Max.

1.20

1.00

0.040

0.030

18.00

0.75

0.65

0.50

Physical Property

Density (g/cm^3)

7.8

Modulus of elasticity

Temperature (℃)

Gpa

204

500

168

Thermal Expansion Coefficient

Temperature (℃)

10^-6/℃

0-315

10.3

0-538

11.7

Thermal Conductivity

Temperature (℃)

W/m·K

100

24.2

Mechanical Property

Items

Annealed

Hardness

255 (HBW) max.

Hardness After Quenching (hardenability)

58 (HRC) min.

Size Ranges

Products

Diameter (mm)

Length (mm)

Rolled bar

10~95

3,000~5,700

Forged bar

95.2~300

3,000~5,700

Billet

130x130, 140x140, 150x150, 160x160

7,000 max

Flat bar

80x80 (min.)

Based on the customer needs

Heat Treatment Conditions

Quenching: 1052℃, oil quenching

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Martensite Stainless Steel bar 440C/1.4125/X105CrMo17/S44004 – GMTC

440C

Product properties

Industrial Applications

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