BS EN 10207-1 C78D C78D2 Patented Spring Steel Wire
Supplying Size:
Diameter:0.1-15mm
Our Advantage
1. Stable linearity, good formability. Uniform and beautiful surface condition.
2. High plasticity and good fatigue resistance. And we provide Self-Inspection Reports and Raw-Material Test Certificates.
3. Professional anti-rust protective packaging. On time delivery, competitive price.
4. Large stock available, no MOQ requirement.
C78D C78D2 Patented Spring Steel Wire Standard
EN 10016-2: 1994 Non-alloy steel rods for drawing and/or cold rolling. Specific requirements for general purpose rod
EN 10016-4: 1994 Non-alloy steel rods for drawing and/or cold rolling. Specific requirements for general purpose rod
BS EN 10270-1 2011 Steel wire for mechanical springs Patented cold drawn unalloyed spring steel wire
Equivalent Materials
GB C78DGB U53782IS IS1835IS IS7904ISO C78DJIS SWRH77AJIS SWRH77BDIN D78-2IS nanKS HSWR77ADIN 1.0620DIN D 78-2DIN C78DAFNOR C78DBS C78DAISI 1075SAE 1075JIS SWRH77EN 1.0620GB/T C78DGB/T U53782UNS G10750
C78D C78D2 Patented Spring Steel Wire Chemical composition
| Steel name | Steel number | C % | Si% | Mn% | P % max. | S % max. | Cr % max. | Ni % max. | Mo % max. | Cl% max. | Al % max. | N% max. |
| C72D | 1.0617 | 0,70-0,75 | 0,10-0,30 | 0,50-0,80 | 35 | 35 | 0.15 | 0.2 | 0.05 | 0.25 | 0.01 | |
| C72D2 | 1.1242 | 0,70-0,74 | 0,10-0,30 | 0,50-0,70 | 0,020 | 0,025 | 0,10 | 0,10 | 0,02 | 0,15 | 0,01 | 0,007 |
C78D C78D2 Patented Spring Steel Wire Drawing condition
All cold drawn spring wire is commonly shaped by drawing. A distinction as to the method of drawing can be
made between:
1 dry drawn (d): drawn through pulverized lubricants such as soap, stearates or similar substances;
2 paste drawn (ps): drawn through very viscous greases of mineral oil base, tallow, synthetic waxes or similar substances;
3 gray bright (gr): drawn through rape oil, thin-bodied mineral oils or similar substances;
4 wet drawn (w): drawn through aqueous emulsions of greases or oil emulsions;
5 liquor finished (l): drawn through aqueous solutions with or without addition of metal salts.
C78D C78D2 Patented Spring Steel Wire Form of delivery
The wire shall be delivered in unit packages of a coil (singles, carriers or formers), spools, spoolless cores or as straight lengths. Unless otherwise agreed at the time of ordering, the form of delivery will be coils; straight lengths shall be supplied in bundles.
C78D C78D2 Patented Spring Steel Wire Coating and surface finish
The spring wire may be supplied phosphate coated (ph) either dry drawn or wet drawn, copper coated (cu), zinc (Z) or zinc/aluminium (ZA) coated.
Other coatings, considered as special, can be agreed between the purchaser and the supplier. If no specific surface finish is specified, the type of finish shall be at the manufacturers discretion. In addition the wire can be ordered with an oiled surface for all surface finishes.
C78D C78D2 Patented Spring Steel Wire Surface treatment
The surface for spring wire generally has a coating for facilitating wire drawing and spring forming.
Exceptionally the material will be uncoated. Common surface coatings are:
1 bright (b): without any special coating: standard borax coating or lime-coating may be applied;
2 phosphate coated (ph): the wire has been treated in a solution to form a metal-phosphate layer on the surface;
3 reddish (rd): the surface is covered with a thin copper, generally a conversion coating;
4 copper plated (cu): the surface is covered with a (uniform) thick copper coating;
5 galvanised (Z): the surface is covered with a zinc coating;
6 zinc/aluminium coated (ZA): the surface is covered with a Zn 95/Al 5 coating;
7 yellow coated (y): this applies only to liquor finished products whereby a mixture of tin salts and copper salts are added at the liquor finishing;
8 white (liquor finished) (wh): this applies to liquor finished products whereby tin salts are added for liquor finishing
Information to be supplied by the purchaser
The purchaser shall clearly state in his enquiry or order the product and following information:
a) the desired quantity;
b) the term spring steel wire or straightened and cut lengths;
c) the number of this European standard: EN 10270-1;
d) the steel grade
e) the nominal wire diameter selected from Table 3 and for cut length the length and the length tolerance class
f) the coating indicated by its abbreviation and surface finish
g) the form of delivery and unit mass
h) the type of inspection document;
i) any particular agreement
The term “patented wire” refers to a particular process through which steel wire is strengthened to particular specifications, rather than an actual type of wire. Sometimes called “improved plow steel” or “extra improved plow steel” wire, patented wire is high-carbon, high-tensile steel wire that has been put through a special heat-treatment process for added durability and strength. For this reason, patented wire is popular for use in the manufacturing of wire rope, music wire and high tensile spring applications. Patented wire can be made to a variety of hardness levels, depending mainly on the carbon level in the steel prior to quenching. It is also available in a variety of diameter sizes.
C78D C78D2 Patented Spring Steel Wire Out of roundness
The difference between the maximum and minimum diameter of the wire at the same cross section shall not be more than 50 % of the total permissible deviation specified
C78D C78D2 Patented Spring Steel Wire Marking and packaging
Each unit shall be properly marked and identified so as to permit traceability and reference to the inspection documents.
The labels shall withstand normal handling and contact with oil; they shall show the information according to EN 10270-1. Other information shall be the subject of an arrangement between the parties.
Wire shipments shall be suitably protected against mechanical damage and/or contamination during transport.
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BS EN 10207-1 C78D C78D2 Patented Spring Steel Wire Images
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