C67S 1.1231 Spring Steel Strip

Spring steel is a type of steel that is specifically used to make springs and elastic parts because it can return to its original shape after bending, compression, or extension. This ability, known as elasticity in the quenched and tempered state, arises due to the high yield strength of the steel, which comes from its specific composition and hardening process. Fabricating spring steel requires advanced technical skills to ensure high quality. Any defects on the surface, such as decarburization or irregularities, can reduce fatigue strength. Baomit strip steel ensures that the springs have a perfectly smooth surface for optimal efficiency and performance.

ParametersRecommendation
Steel GradeC67S
BrandBaomit
CertificationISO9001:2015
Hardness48 – 52 HRC
Surface FinishWhite polished
EdgesSlit, square or round
Thickness Tolerance+/- 0.005
Width Tolerance+/- 0.10
CamberMax 1mm per 3m
C67S 1.1231 Spring 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 Steel C67S (1.1231):   EN 10132-4-2000

CSiMnNiPSCrMo
0.65-0.730.15-0.350.60-0.90max 0.40max 0.025max 0.025max 0.40max 0.10

 

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

 

C67S Spring Steel Strip


Place of Origin: China

Manufacturer: Hubei Baomit Steel Materials Co., Ltd.

Steel Grade: C67S

Equivalent Grades: SAE1070

Supply Condition: Hardened and Tempered (H & T)

Applications: Springs, blades, strippers, scrapers

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

C67S Spring 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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