440C Hardened Tempered Martensitic Stainless Steel Strip

Baomit offers hardened and tempered martensitic stainless steel in 420J2, 440A, 440B and 440C grades. Martensitic steel is a type of stainless steel that is known for its strength, corrosion resistance, and durability. These qualities make martensitic steel a good choice for a variety of applications, like automotive, machinery parts, and saw blades, for products typically subjected to harsh environments and demanding applications.

ParametersRecommendation
Steel Grade440C
BrandBaomit
CertificationISO9001:2015
Hardness48 – 52 HRC
Surface FinishWhite polished, blue polished, yellow polished
EdgesSlit, square or round
Thickness Tolerance+/- 0.005
Width Tolerance+/- 0.10
CamberMax 1mm per 3m
440C Hardened Tempered Martensitic Stainless Steel Strip

 

Our Advantages:

• Excellent fatigue resistance

• Excellent punching and stamping properties

• Precise thickness and width tolerances

• Maximum straightness deviation of 1 mm / 6 m

• Good surface finish

• Consistent, uniform microstructure

 

Chemical Composition % of 440 Stainless Steel

GradeCSiMnPSCrMo
440A0.60-0.75max 1.0max 1.0max 0.04max 0.0316.0-18.0max 0.75
440B0.75-0.95max 1.0max 1.0max 0.04max 0.0316.0-18.0max 0.75
440C0.95-1.20max 1.0max 1.0max 0.04max 0.0316.0-18.0max 0.75

 

Thickness Tolerances

Thickness (mm)Tolerances ± mm
T1T2T3T4T5
0.020 - 0.0400.0040.0030.002--
0.040 - 0.1000.0060.0050.0040.0030.002
0.100 - 0.1250.0070.0050.0040.0030.002
0.125 - 0.1600.0090.0060.0050.0040.003
0.160 - 0.2000.0100.0070.0050.0040.003
0.200 - 0.2500.0110.0080.0060.0040.003
0.250 - 0.4000.0150.0110.0080.0060.004
0.400 - 0.6000.0200.0140.0100.0070.005
0.600 - 0.8000.0230.0170.0120.0080.006
0.800 - 1.0000.0270.0190.0130.0090.007
1.000 - 1.2500.0340.0240.0170.0120.008
1.250 - 1.6000.0390.0280.020--
1.600 - 1.7500.0460.0330.023--

 

Width Tolerances

Thickness (mm)Width (mm)Tolerances ± mm
W1W2W3
≤0.25≤500.100.070.05
50 - 1250.150.110.07
>1250.200.150.10
0.25 - 0.50≤500.150.110.07
50 - 1250.200.150.10
>1250.250.200.15
0.50 - 1.00≤500.200.150.10
50 - 1250.250.200.15
>1250.300.250.15
1.00 - 1.60≤500.200.150.10
50 - 1250.300.250.15
>1250.350.250.20
1.60 - 1.75≤500.300.200.15
50 - 1250.350.300.20
>1250.400.300.20

 

Surface Roughness

Available in white polished, blue polished and yellow.

Thickness (mm)Roughness
Class 1Class 2Class 3
≤0.50Ra≤ 0.30 µm
Rt≤ 3.00 µm
Ra≤0.25 µm
Rt≤ 2.50 µm
Ra≤ 0.20 µm
Rt≤ 2.00 µm
0.50 - 1.00Ra≤ 0.35 µm
Rt≤ 3.50 µm
Ra≤ 0.25 µm
Rt≤ 2.50 µm
Ra≤ 0.20 µm
Rt≤ 2.00 µm
1.00 - 1.75Ra≤ 0.40 µm
Rt≤ 4.00 µm
Ra≤ 0.30 µm
Rt≤ 3.00 µm
Ra≤ 0.30 µm
Rt≤ 3.00 µm

 

Flatness Deviation

Maximum flatness deviation per inch strip width.

Thickness (mm)Flatness Deviation
Class 1Class 2Class 3Class 4
0.02 - 0.10P60P50P40P30
0.10 - 0.25P50P40P30P20
0.25 - 0.50P40P30P20P10
0.50 - 1.75P35P25P15P10

 

Straightness Deviation

Strip Width (mm)Measured Length (3m)
Class 1Class 2Class 3
≤503 mm2 mm1 mm
50 - 1253 mm2 mm1 mm
>1253 mm2 mm1 mm

 

440C Hardened and Tempered Stainless Steel Strip


Place of Origin: China

Manufacturer: Hubei Baomit Steel Materials Co., Ltd.

Steel Grade: 440C

Equivalent Grades: X6Cr13

Supply Condition: Hardened and Tempered (H & T)

Applications: Knives, Valves, Measuring Tapes, Razor, Cutter, Surgical Blade

Brand: BAOMIT

Min Order: 1 Ton

Package: Pallet

Delivery Time: 4-5 weeks

Payment Term: L/C, T/T, Western Union

Production Capacity: 300 tons per month

440C Hardened Tempered Martensitic Stainless Steel Strip

"Baomit strip steel stands for precision, quality and high performance. Our factory is excellent in terms of comprehensive delivery indicators, such as straightness, flatness, mechanical properties and metallographic uniformity."

     - Mr. Lixian Yang

Company CEO

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