C100S Steel Strip Coil Manufacturer and Supplier | RAYIWELL
C100S is a high-carbon chromium spring steel that conforms to German standard EN10132-4:2000. It is commonly used to manufacture high-strength, high-elasticity springs and elastic elements.
C100S is a high-carbon spring steel, also known as 1.1274 or AISI 1095, prized for its high tensile strength, hardness, and elasticity after heat treatment.
C100S Steel Strip coil is used in applications requiring high elasticity and strength, such as various types of springs, feeler gauges, and precision cutting tools.
CS100 is not corrosion-resistant and requires proper care to prevent rust.
C100S Spring Steel is a carbon spring steel which are used widely for springs, saws, clutch plates and valves etc. CS100 can be cut by laser, waterjet etc.
It is generally used where higher hardnesses and wear resistance is required or where a higher strength is required in lower thickness material. Common equivalents are CS95, 1095, CS100, XC90.
| Parameters | Recommendation |
| Steel Grade | C100S |
| Brand | TOP METAL |
| Certification | ISO9001:2015 |
| Hardness | 48 – 52 HRC |
| Surface Finish | White polished, blue polished, yellow polished |
| Edges | Slit, square or round |
| Thickness Tolerance | +/- 0.005 |
| Width Tolerance | +/- 0.10 |
| Camber | Max 1mm per 3m |
Carbon content, ranging from 0.95% to 1.05%, is the dominant element determining the high-strength properties of steel.
Silicon content, between 0.15% and 0.35%, enhances strength and oxidation resistance.
Manganese content, between 0.30% and 0.60%, improves hot working properties.
Phosphorus and sulfur content are both ≤0.025% to reduce hot and cold brittleness.
Chromium content ≤0.40% enhances hardenability and corrosion resistance.
Furthermore, molybdenum content ≤0.10% and nickel content ≤0.40% improve hot strength, tempering stability, and corrosion resistance.
Precision Strip Processing
Thickness Range: .0003″ to .125″ Gauge (0.00762mm – 3.175mm)
Thickness Tolerance: +/- .0005″ (+/- 0.0127mm)
Width Range: .020″ – 14″ (0.508mm – 355.6mm)
Width Tolerance: +/- .005″ (+/- 0.127mm)
Chemical Composition % of Steel C100S (1.1274): EN 10132-4-2000
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.95-1.05 | 0.15-0.35 | 0.30-0.60 | max 0.40 | max 0.025 | max 0.025 | max 0.40 | max 0.10 |
C100S High Carbon Strip Steel’s Thickness Tolerance
| Thickness (mm) | Tolerances ± mm | ||||
| T1 | T2 | T3 | T4 | T5 | |
| 0.020 – 0.040 | 0.004 | 0.003 | 0.002 | – | – |
| 0.040 – 0.100 | 0.006 | 0.005 | 0.004 | 0.003 | 0.002 |
| 0.100 – 0.125 | 0.007 | 0.005 | 0.004 | 0.003 | 0.002 |
| 0.125 – 0.160 | 0.009 | 0.006 | 0.005 | 0.004 | 0.003 |
| 0.160 – 0.200 | 0.010 | 0.007 | 0.005 | 0.004 | 0.003 |
| 0.200 – 0.250 | 0.011 | 0.008 | 0.006 | 0.004 | 0.003 |
| 0.250 – 0.400 | 0.015 | 0.011 | 0.008 | 0.006 | 0.004 |
| 0.400 – 0.600 | 0.020 | 0.014 | 0.010 | 0.007 | 0.005 |
| 0.600 – 0.800 | 0.023 | 0.017 | 0.012 | 0.008 | 0.006 |
| 0.800 – 1.000 | 0.027 | 0.019 | 0.013 | 0.009 | 0.007 |
| 1.000 – 1.250 | 0.034 | 0.024 | 0.017 | 0.012 | 0.008 |
| 1.250 – 1.600 | 0.039 | 0.028 | 0.020 | – | – |
| 1.600 – 1.750 | 0.046 | 0.033 | 0.023 | – | – |
Width Tolerances of C100S Steel Strip Coil
| Thickness (mm) | Width (mm) | Tolerances ± mm | ||
| W1 | W2 | W3 | ||
| ≤0.25 | ≤50 | 0.10 | 0.07 | 0.05 |
| 50 – 125 | 0.15 | 0.11 | 0.07 | |
| >125 | 0.20 | 0.15 | 0.10 | |
| 0.25 – 0.50 | ≤50 | 0.15 | 0.11 | 0.07 |
| 50 – 125 | 0.20 | 0.15 | 0.10 | |
| >125 | 0.25 | 0.20 | 0.15 | |
| 0.50 – 1.00 | ≤50 | 0.20 | 0.15 | 0.10 |
| 50 – 125 | 0.25 | 0.20 | 0.15 | |
| >125 | 0.30 | 0.25 | 0.15 | |
| 1.00 – 1.60 | ≤50 | 0.20 | 0.15 | 0.10 |
| 50 – 125 | 0.30 | 0.25 | 0.15 | |
| >125 | 0.35 | 0.25 | 0.20 | |
| 1.60 – 1.75 | ≤50 | 0.30 | 0.20 | 0.15 |
| 50 – 125 | 0.35 | 0.30 | 0.20 | |
| >125 | 0.40 | 0.30 | 0.20 | |
Surface Roughness of High Carbon Steel C100S
Available in white polished, blue polished and yellow.
| Thickness (mm) | Roughness | ||
| Class 1 | Class 2 | Class 3 | |
| ≤0.50 | Ra≤ 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 – 1.00 | Ra≤ 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 – 1.75 | Ra≤ 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 of C100S Spring Steel Strip Coil
Maximum flatness deviation per inch strip width.
| Thickness (mm) | Flatness Deviation | |||
| Class 1 | Class 2 | Class 3 | Class 4 | |
| 0.02 – 0.10 | P60 | P50 | P40 | P30 |
| 0.10 – 0.25 | P50 | P40 | P30 | P20 |
| 0.25 – 0.50 | P40 | P30 | P20 | P10 |
| 0.50 – 1.75 | P35 | P25 | P15 | P10 |
Straightness Deviation
| Strip Width (mm) | Measured Length (3m) | ||
| Class 1 | Class 2 | Class 3 | |
| ≤50 | 3 mm | 2 mm | 1 mm |
| 50 – 125 | 3 mm | 2 mm | 1 mm |
| >125 | 3 mm | 2 mm | 1 mm |
C100S steel is mostly used to manufacture suspension springs and clutch springs in the automotive industry and used for molds, fixtures, and high-strength bolts in machinery manufacturing.
In the field of precision instruments, such as watch springs and elastic components of aircraft engines, C100S steel is also commonly used.
