Tape Measure Steel

Tape measures feature pocket tapes, long tapes, and adhesive-backed tapes in a variety of lengths and styles. It consists of a metal strip with linear measurement markings. It is a common measuring tool. Its design allows for a measure of great length to be easily carried in pocket or toolkit and permits one to measure around curves or corners. Baomit strip steel meets the highest requirements made by tape measure manufacturers with precise thickness tolerances, good surface finish, and uniform microstructure. If you would like to learn more the quality of our strip steel then please contact our experts who will be very happy to advise you.

ParametersRecommendation
Thickness ToleranceT2
RoughnessClass 3
FlatnessClass 3
SurfaceBright or Blue Tempered
EdgesSlit / deburred
Hardness560 – 640 HV
Steel GradeSK4, SK5

Baomit Strip Steel for Tape Measures & Measuring Tapes

Our Advantages:

• Excellent wear resistance

• Precise thickness and width tolerances

• Maximum straightness deviation of 1 mm / 6 m

• Good surface finish

• Consistent, specially adapted microstructure

Steel Grades

Comparison of Norms
JAPAN / JISEU / ENChemical Composition
SK4C100SC: 0.90-1.00, Si: 0.10-0.35, Mn: 0.10-0.50, P: max 0.03, S: max 0.03, Cr: max 0.3, Ni: max 0.25, Cu: max 0.25
SK5C90SC: 0.80-0.90, Si: 0.10-0.35, Mn: 0.10-0.50, P: max 0.03, S: max 0.03, Cr: max 0.3, Ni: max 0.25, Cu: max 0.25

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

Hubei Baomit Steel Materials Co., Ltd.

China Verified Manufacturer of Hardened and Tempered (H & T) Strip Steel