BS EN DIN 54SiCr6 1.7102 Cold Rolled or Drawn Flat Alloy Steel Wire For Spring

Grade : 54SiCr6

Number: 1.7102

Classification: Alloy special steel

Standard:

EN 10089: 2002 Hot rolled steels for quenched and tempered springs. Technical delivery conditions

Equivalent Materials to DIN 54SiCr6

54SiCr6 1.7102 Oil hardened spring steel wire Chemical composition

54SiCr6 1.7102 Flat Steel Wire Thickness, Width and Tolerances

Thickness: 1 to 10mm; Tolerances +/-0.013 to 0.05mm

Width: 1 to 25mm; Tolerances +/- 0.08 to 0.13mm

Our spring steel wire 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.

54SiCr6 1.7102 Flat Steel Wire Finish Surface

Untempered-carbon spring steel flat wire is commonly supplied in a Number 2 regular bright finish. The manufacturer should be consulted if another finish is required.

Hardened and tempered spring steel flat wire is usually supplied in one of the following recognized finishes:

1 Black-tempered,

2 Scaleless-tempered,

3 Bright-tempered,

4 Tempered and polished,

5 Tempered, polished, and colored (blue or straw), and

Unless otherwise specified, flat wire is coated with oil to minimize scratching and to retard rusting in transit. If the product is not to be oiled, it must be so specified.

54SiCr6 Steel Mechanical Properties

54SiCr6 1.7102 Heat treatment

Soft Annealing:
Heat to 640-680C, cool slowly in furnace. This will produce a maximum Brinell hardness of 310.

Normalizing:
Temperature: 850-880C, air.

Hardening:
Harden from a temperature of 840-870C followed by oil quenching.

Tempering:
Tempering temperature: 430-500C, air.

54SiCr6 1.7102 Flat Steel Wire Edge

Number 1 Edge is a prepared edge of a specified contour (round or square) which is produced when a very accurate width is required or when the finish of the edge suitable for electroplating is required, or both.

Number 2 Edge is not applicable to flat wire products.

Number 3 Edge is an approximately square edge produced by slitting.

Number 4 Edge is a rounded edge produced either by edge rolling or resulting from the flat rolling ofa round section. Width tolerance and edge condition are not as exacting as for a No. 1 Edge.

Number 5 Edge is an approximately square edge produced from slit–edge material on which the burr is eliminated by rolling or filing.

Number 6 Edge is a square edge produced by edge rolling when the width tolerance and edge condition are not as exacting as for No. 1 Edge.

Types of Untempered Spring Steel Flat Wire

Hard-Type Spring Steel Flat Wire

Soft-Type Spring Steel Flat Wire

Soft-Type Annealed Spring Steel Flat Wire

Soft-Type Intermediate Spring Steel Flat Wire

Spheroidize-Type Spring Steel Flat Wire

54SiCr6 1.7102 Flat Steel Wire Application

Untempered-Carbon Spring Steel Flat Wire: Umbrella rib wire, metal-band saw steel.

Hardened and Tempered Carbon Spring Steel Flat Wire : Tape line, brush wire, heddle wire.

54SiCr6 1.7102 steel is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 54SiCr6 1.7102 is the designation in both the DIN and EN systems for this material. 54SiCr6 is a Standard grade Alloy Steel. It is commonly called 54SiCr6 Silicon-manganese steel. It is composed of (in weight percentage) 0.51-0.59% Carbon (C), 0.60-0.80% Manganese (Mn), 0.035%(max) Phosphorus (P), 0.04%(max) Sulfur (S), 1.20-1.60% Silicon (Si), 0.60-0.80% Chromium (Cr), and the base metal Iron (Fe). Other designations of 1.7102 alloy steel include UNS G92540 and AISI 9254.

spring steel flat wire is produced to a range in which the specified or required maximum is over 0.25 % by cast or heat analysis. Two types of carbon spring steel flat wire are produced:

1 Untempered cold-rolled spring steel flat wire, produced to several desirable combinations of properties

2 Hardened and tempered carbon spring steel wire.

54SiCr6 1.7102 Flat Steel Wire Manufacture

Flat wire is generally produced from hot-rolled rods or round wire, by one or more cold-rolling operations, primarily for the purpose of obtaining the size and section desired and for improving surface finish, dimensional accuracy, and varying mechanical properties. Flat wire can also be produced from slitting hot- or cold-rolled flat steel to the desired width. The hot-rolled slit flat steel is subsequently cold reduced. The width to thickness ratio and the specified type of edge generally determine the process that is necessary to produce a specific flat-wire item. The production of good surface quality flat wire is dependent upon scale-free and clean wire, rod, or hot-rolled steel prior to cold-rolling. Scale removal can be accomplished by chemical or mechanical cleaning.

The fatigue resistance is a property that exerts a strong influence on the suspension spring performance in vehicles. The choice of 54SiCr6 1.7102 steel was due to its wide use in the manufacture of these springs and their fatigue properties and toughness. The manufacture of 54SiCr6 1.7102 steel springs has been made by the hot winding process and the heat treatment by conventional quenching and tempering or by cold winding process and induction hardening and tempering. The shot peening induced a compressive residual stress which increased the fatigue life of the 54SiCr6 1.7102 steel. The residual stress profile from the surface of springs showed a peak in the values of the compressive stress for both manufacturing processes. The maximum residual stress in the cold processed spring was higher than the hot processed spring and maintained much higher values along the thickness of the spring from the surface, resulting from manufacturing processes. The fatigue cracking of the springs, without shot peening, started by torsional fatigue process, with typical macroscopic propagation. The fracture surface showed stretch marks with high plastic deformation.

54SiCr6 1.7102 Flat Steel Wire Ordering Information

Orders for material to this specification shall include the following information, as necessary, to describe adequately the

desired product:

1 Quantity,

2 Name of material (flat wire identified by type),

3 Analysis or grade, if required

4 Temper of low carbon or type of spring steel

5 Edge

6 Finish or coating

7 Dimensions,

8 Coil type and size requirements

9 Packaging

10 Condition (oiled or not oiled)

11 ASTM designation and date of issue,

12 Copper-bearing steel, if required,

13 Application (part identification or description),

14 Case or heat analysis (request, if desired), and

15 Exceptions to the specification, if required.

54SiCr6 1.7102 Flat Steel Wire Packaging

Flat wire is prepared for shipment in a number of ways. The material may be bare, paper or burlap wrapped, boxed, skidded or palletized, skidded and shrouded, palletized and shrouded, barrelled, or a combination thereof. The purchaser should specify the method desired. When coils are ordered it should be specified whether a ribbon or tape wound or a vibrated coil is desired. Since coil diameters and weights vary by the manufacturers, the manufacturer should be consulted for specific capability and limitations. When coil weight is specified for low-carbon steel flat wire or for untempered-carbon spring steel flat wire, it is common practice to ship not more than 10 % of the total weight of an item in short coils, which are those weighing between 25 and 75 % of the maximum coil weight.