SWRH42B Lost Wax Investment Casting
This standard specifies the size, shape, weight, allowable deviations, technical requirements, inspection and testing, packaging, marking, and quality certificates of high-carbon steel wire rods.
Product Introduction
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SWRH42B lost wax investment casting |
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Item |
Material |
Production Process |
Sintering Temperature |
Mold |
Custom |
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SWRH42B lost wax investment casting |
SWRH42B |
Molten mold casting |
1380℃ |
To be customized |
Yes |
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Available Materials |
Carbon steel, alloy steel, aluminum alloy, low -carbon stainless steel, titanium alloy (TI, TC4), copper alloy, high temperature alloy (718, 713) |
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Smoothness |
Dimensional accuracy |
Product density |
Appearance treatment |
Appropriate weight |
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Roughness 1～5μm |
(±0.1%～±0.5%) |
7.8g/CM³ |
According to customer requirements |
3g～4kg) |
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Scope
This standard specifies the size, shape, weight, allowable deviations, technical requirements, inspection and testing, packaging, marking, and quality certificates of high-carbon steel wire rods.
This standard applies to high-carbon steel twist-free cold and hot rolled wire rods produced by Baoshan Iron and Steel Co., Ltd. for use in the manufacture of high-carbon steel wires, oil tempered steel wires, prestressed high-carbon steel wires, galvanized steel strands, steel wire ropes, etc.
Normative Reference Documents
The provisions in the following documents become provisions of this standard through reference to this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For updated referenced documents, the latest edition applies to this standard.
GB/T 222 Sample sampling method for chemical analysis of steel and allowable deviations of the chemical composition of finished products
GB/T 223 Chemical analysis methods for steel and alloys
GB/T 224 Determination method of decarburized layer depth of steel
GB/T 228 Metallic Materials Tensile Test Method at Room Temperature
GB/T 232 Metallic materials bending test methods
GB/T 233 Metal materials Upset test method
GB/T 2975 Sampling regulations for steel mechanical and process performance testing
GB/T 10561 Microscopic evaluation method of non-metallic inclusions in steel
GB/T 13298 Metal microstructure examination methods
YB/T 169 Metallographic detection method for sorbate content in high carbon steel wire rods
YB/T 5148 Determination method of average grain size of metals
Q/BQB 500 General provisions for wire rod packaging, marking, and quality certificates
Q/BQB 501 wire rod size, shape, weight, and allowable deviation
JIS G3506:1996 High carbon steel wire rod
Dimensions, appearance, weight, and allowable deviations shall comply with the provisions of Q/BQB 501.
Skills Requirement
Brand and chemical composition
The grade and chemical composition (smelting composition) of steel should comply with the requirements in Table 1.
The allowable deviation of the chemical composition of finished wire rods shall comply with the provisions of GB/T 222.
According to the requirements of the buyer and upon agreement between the supplier and the buyer, wire rods of other grades or chemical compositions can also be supplied.
Table 1
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Trademark |
Chemical composition % |
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C |
Si |
Mn |
P |
S |
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SWRH32 |
0.29～0.36 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH42A |
0.39～0.46 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH42B |
0.39～0.46 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH47A |
0.44～0.51 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH47B |
0.44～0.51 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH52A |
0.49～0.56 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH52B |
0.49～0.56 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH57A |
0.54～0.61 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH57B |
0.54～0.61 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH62A |
0.59～0.66 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH62B |
0.59～0.66 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH67A |
0.64～0.71 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH67B |
0.64～0.71 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH72A |
0.69～0.76 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH72B |
0.69～0.76 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH77A |
0.74～0.81 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH77B |
0.74～0.81 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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SWRH82A |
0.79～0.86 |
0.15～0.35 |
0.30～0.60 |
≤0.030 |
≤0.030 |
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SWRH82B |
0.79～0.86 |
0.15～0.35 |
0.60～0.90 |
≤0.030 |
≤0.030 |
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Note: SWRH32~SWRH82B are the grades in JIS G3506. The steel is deoxidized using aluminum-silicon killing. |
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• Smelting methods
Steel is smelted by an oxygen converter or electric furnace. If the buyer does not specify otherwise, the smelting method is determined by the supplier.
• Delivery status
Wire rod is delivered in hot rolled condition.
• Decarburization layer
Wire rods of SWRH62A～SWRH82A and SWRH62B～SWRH82B steel should be inspected for the depth of the decarburization layer. The depth of the total decarburization layer (ferrite + transition layer) on one side of the wire rod shall not be greater than 1.5% of the nominal diameter of the wire rod.
According to the requirements of the buyer, wire rods of other steels can also be inspected for the depth of the decarburization layer, and the indicators are stipulated by agreement between the supplier and the buyer.
• Microstructure
The wire rod should not have reticular cementite and quenching structures (martensite and troostite areas). If the supplier has guarantees in terms of process, inspection is not required.
• Surface Quality
The surface of the wire rod should be smooth and free of cracks, folds, scars, ears, and other defects that are harmful to use. Indentations and local bumps, pits, scratches, and pits are allowed, but their depth or height (calculated from the actual size): A-level accuracy shall not be greater than 0.15mm; B- and C-level accuracy shall not be greater than 0.10mm.
Harmful defects at the head and tail of the wire rod should be cut off, and the cross-section should be free of shrinkage holes, delaminations, and inclusions.
Oxide scale
The weight of the oxide scale on the surface of the wire rod shall not exceed 7kg/t. If the supplier has guarantees in terms of workmanship, inspection is not required.
• special requirements
According to the requirements of the buyer and upon agreement between the supplier and the buyer, inspections of mechanical properties, grain size, sorbate content, bending test, cold upsetting test, non-metallic inclusions, or other items can be carried out. The indicators shall be stipulated by agreement between the two parties.
Detection Systems
Copper Silica Sol Investment Casting
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