Blue Surface Spring Steel Strip
Blue alloy cold rolled narrow steel strip thicknesses up to 6mm; alloy cold rolled narrow steel strip in the quenched and tempered condition in thicknesses between 0.3 mm and 3.00 mm for springs and for other special applications.
Dimensions and tolerances
Thickness: 1 to 8 mm; Tolerances: +/- 0.008 to 0.11 mm
Width: 10 to 400 mm; Tolerances: +/- 0.15 to 0.60
*accept nonstandard size, please contact with our sales.
Our Advantage
1. Precise thickness, uniform hardness. Bright surface, smooth edge.
2. High flatness of board surface, high performance after multiple bending.
3. No cracking after stamping, and the quality is stable. And we provide Self-Inspection Reports and Raw-Material Test Certificates.
4. Professional anti-rust protective packaging. On time delivery, competitive price.
5. Large stock available, no MOQ requirement
Blue Cold Rolled Strip Chemical composition
| name |
number |
C |
Si |
Mn |
P max. |
S max. |
Cr |
Mo max. |
V |
Ni |
| C55S |
1.1204 |
0,52 to 0,60 |
0,15 to 0,35 |
0,60 to 0,90 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C60S |
1.1211 |
0,57 to 0,65 |
0,15 to 0,35 |
0,60 to 0,90 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C67S |
1.1231 |
0,65 to 0,73 |
0,15 to 0,35 |
0,60 to 0,90 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C75S |
1.1248 |
0,70 to 0,80 |
0,15 to 0,35 |
0,60 to 0,90 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C85S |
1.1269 |
0,80 to 0,90 |
0,15 to 0,35 |
0,40 to 0,70 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C90S |
1.1217 |
0,85 to 0,95 |
0,15 to 0,35 |
0,40 to 0,70 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C100S |
1.1274 |
0,95 to 1,05 |
0,15 to 0,35 |
0,30 to 0,60 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| C125S |
1.1224 |
1,20 to 1,30 |
0,15 to 0,35 |
0,30 to 0,60 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| 48Si7 |
1.5021 |
0,45 to 0,52 |
1,60 to 2,00 |
0,50 to 0,80 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| 56Si7 |
1.5026 |
0,52 to 0,60 |
1,60 to 2,00 |
0,60 to 0,90 |
0,025 |
0,025 |
max. 0,40 |
0,10 |
|
max. 0,40 |
| 51CrV4 |
1.8159 |
0,47 to 0,55 |
max. 0,40 |
0,70 to 1,10 |
0,025 |
0,025 |
0,90 to 1,20 |
0,10 |
0,1 to 0,25 |
max. 0,40 |
| 80CrV2 |
1.2235 |
0,75 to 0,85 |
0,15 to 0,35 |
0,30 to 0,50 |
0,025 |
0,025 |
0,40 to 0,60 |
0,10 |
0,15 to 0,25 |
max. 0,40 |
| 75Ni8 |
1.5634 |
0,72 to 0,78 |
0,15 to 0,35 |
0,30 to 0,50 |
0,025 |
0,025 |
< 0,15 |
0,10 |
- |
1,80 to 2,10 |
| 125Cr2 |
1.2002 |
1,20 to 1,30 |
0.15 to 0,35 |
0,25 to 0,40 |
0,025 |
0,025 |
0,40 to 0,60 |
0,10 |
- |
max. 0,40 |
| 102Cr6 |
1.2067 |
0,95 to 1,10 |
0,15 to 0,35 |
0,20 to 0,40 |
0,025 |
0,025 |
1,35 to 1,60 |
0,10 |
- |
max. 0,40 |
Blue Cold Rolled Strip Mechanical properties
| Steel designation |
delivery condition |
| annealed (+A) or annealed and skin passed (+LC) |
cold rolled (+CR) |
quenched and tempered (+QT) |
| name |
number |
Proof strength max. Mpa |
Tensile strength max. Mpa |
Elongation % min. |
HV max. |
Tensile strength max. Mpa |
HV max. |
Tensile strength Mpa |
HV |
| C55S |
1.1204 |
480 |
600 |
17 |
185 |
1070 |
300 |
1 100 to 1 700 |
340 to 520 |
| C60S |
1.1211 |
495 |
620 |
17 |
195 |
1100 |
305 |
1 150 to 1 750 |
345 to 530 |
| C67S |
1.1231 |
510 |
640 |
16 |
200 |
1140 |
315 |
1 200 to 1 900 |
370 to 580 |
| C75S |
1.1248 |
510 |
640 |
15 |
200 |
1170 |
320 |
1 200 to 1 900 |
370 to 580 |
| C85S |
1.1269 |
535 |
670 |
15 |
210 |
1190 |
325 |
1 200 to 2 000 |
370 to 600 |
| C90S |
1.1217 |
545 |
680 |
14 |
215 |
1200 |
325 |
1 200 to 2 100 |
370 to 600 |
| C100S |
1.1274 |
550 |
690 |
13 |
220 |
1200 |
325 |
1 200 to 2 100 |
370 to 630 |
| C125S |
1.1224 |
600 |
740 |
11 |
230 |
1200 |
325 |
1 200 to 2 100 |
370 to 630 |
| 48Si7 |
1.5021 |
580 |
720 |
13 |
225 |
- |
- |
1 200 to 1 700 |
370 to 520 |
| 56Si7 |
1.5026 |
600 |
740 |
12 |
230 |
- |
- |
1 200 to 1 700 |
370 to 520 |
| 51CrV4 |
1.8159 |
550 |
700 |
13 |
220 |
- |
- |
1 200 to 1 800 |
370 to 550 |
| 80CrV2 |
1.2235 |
580 |
720 |
12 |
225 |
- |
- |
1 200 to 1 800 |
370 to 550 |
| 75Ni8 |
1.5634 |
540 |
680 |
13 |
210 |
- |
- |
1 200 to 1 800 |
370 to 550 |
| 125Cr2 |
1.2002 |
590 |
750 |
11 |
235 |
- |
- |
1 300 to 2 100 |
405 to 630 |
| 102Cr6 |
1.2067 |
590 |
750 |
11 |
235 |
- |
- |
1 300 to 2 100 |
405 to 630 |
Blue Cold Rolled Strip Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order to enable the supplier to comply with the requirements of this European Standard:
a) the quantity to be delivered;
b) the designation of the product form (cold rolled narrow strip);
c) the number of the dimensional standard (EN 10140);
d) the dimensions and tolerances on dimensions and shape and, if applicable, letters
denoting relevant special tolerances;
e)the number of this European Standard including the number of the relevant part;
f) steel name or steel number
g) the delivery condition
h) if required, the type of inspection document in accordance with EN 10204.
Blue Cold Rolled Strip Delivery condition
Cold rolled narrow steel strip covered by EN10132-4 shall be supplied in one of the following delivery conditions:
-annealed or annealed and skin passed(+A or +LC);
-cold rolled(+CR);
-quenched and tempered(+QT).
NOTE The delivery condition-annealed to achieve spheroidized carbides(+AC)-may be agreed. In such cases, limits on spheroidization and mechanical properties may also be agreed at the time of enquiry and order.
Blue Cold Rolled Strip Decarburization
For silicon alloyed steels, decarburization shall not exceed 3% of the material thickness per side,for non silicon alloyed steels, decarburization shall not exceed 2% of the material thickness per side when measure data distance of 5mm from the stripe edge
Blue Cold Rolled Strip Surface finish
The surface finish of cold rolled narrow steel strip shall be bright as produced by rolling and annealing in a controlled atmosphere.
The surface finishes of quenched and tempered cold rolled strip are as follows:
1 grey/blue oxide finish:unpolished;
2 brigth tempered:unpolished
3 polished: obtained by fine grinding, abrasive brushing or other processes;
4 polished and coloured:blue or yellow colour obtained by oxidization by heat
treatment.
We hold expertise in providing a qualitative range of Blue Tempered Steel Strips to our clients at affordable prices. Owing to features like high efficiency, optimum performance and durable finish standards they are highly demanded in the market. Our ranges of these are used in various industries like automobile, cable and electronic industries. Clients can avail these strips in various dimensions with thickness as per their own requirement. We supply these at market leading prices. Known for its durability and rigidity, blue spring steel is often used in the production of clips, blades/knives, springs, coiled springs, washers, saw blades, trowels, scrapers, doctor blades for pulp mill & printing applications, spring clamps, antennas, lock picks, clock hands, grass/grain cutting tools, and brake discs.
Blue Cold Rolled Strip Inspection and testing
a suitable frequency of verification of the dimensions of the products;
an adequate intensity of visual examination of the surface quality of the products;
an appropriate frequency and type of test to ensure that the correct grade of steel is used.
Extent of testing
Tensile and bending tests
Tolerances on shape
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