ASTM A216 WCA

ASTM A216/A216M-18 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-temperature Service.

ASTM A216 has three grading levels: A, B and C. That is, ASTM A216 WCA, ASTM A216 WCB, and ASTM A216 WCC. The WC signifies that the carbon steel is weldable cast. The A, B and C signify the quality of steel, with C being the highest or “best”. From A to C, the manganese content and yield strength increase.

Grade WCA is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges and other pressure-containing parts for high temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding.

ASTM A216 Grade WCC casting chemical composition and mechanical properties:

Baoding Guokun is an ISO 9001-2008 registered iron and steel foundry and supplier of high-quality customized castings in carbon steel, alloy steel, stainless steel, gray iron, ductile iron, aluminum and brass. Our machined casting parts are mainly used for power, electrical, mining, agriculture, railway, truck, oil & gas, valve and pump, marine, etc.

It is our mission to provide flexible, cost-effective solutions for our customer on time, every time while maintaining the highest standards of quality. If you have any inquiry of various casting & forging parts, please contact us vis gina@guokuncasting.com or gina.guokun@gmail.com to get a quote.

ASTM A216 WCA

ASTM A216/A216M-18 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-temperature Service.

ASTM A216 has three grading levels: A, B and C. That is, ASTM A216 WCA, ASTM A216 WCB, and ASTM A216 WCC. The WC signifies that the carbon steel is weldable cast. The A, B and C signify the quality of steel, with C being the highest or “best”. From A to C, the manganese content and yield strength increase.

Grade WCA is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges and other pressure-containing parts for high temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding.

ASTM A216 Grade WCC casting chemical composition and mechanical properties:

Baoding Guokun is an ISO 9001-2008 registered iron and steel foundry and supplier of high-quality customized castings in carbon steel, alloy steel, stainless steel, gray iron, ductile iron, aluminum and brass. Our machined casting parts are mainly used for power, electrical, mining, agriculture, railway, truck, oil & gas, valve and pump, marine, etc.

It is our mission to provide flexible, cost-effective solutions for our customer on time, every time while maintaining the highest standards of quality. If you have any inquiry of various casting & forging parts, please contact us vis gina@guokuncasting.com or gina.guokun@gmail.com to get a quote.

ASTM A216 WCC

ASTM A216/A216M-18 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-temperature Service.

ASTM A216 has three grading levels: A, B and C. That is, ASTM A216 WCA, ASTM A216 WCB, and ASTM A216 WCC. The WC signifies that the carbon steel is weldable cast. The A, B and C signify the quality of steel, with C being the highest or “best”. From A to C, the manganese content and yield strength increase.

Grade WCC is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges and other pressure-containing parts for high temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding.

ASTM A216 Grade WCC casting chemical composition and mechanical properties:

Baoding Guokun is an ISO 9001-2008 registered iron and steel foundry and supplier of high-quality customized castings in carbon steel, alloy steel, stainless steel, gray iron, ductile iron, aluminum and brass. Our machined casting parts are mainly used for power, electrical, mining, agriculture, railway, truck, oil & gas, valve and pump, marine, etc.

It is our mission to provide flexible, cost-effective solutions for our customer on time, every time while maintaining the highest standards of quality. If you have any inquiry of various casting & forging parts, please contact us vis gina@guokuncasting.com or gina.guokun@gmail.com to get a competitive prices.

Induction hardening

Induction hardening is a type of heat treatment process in which a metal part is induction-heated and then quenched. It is a process used for the surface hardening of steel and other alloy components.

Induction hardening can increase the mechanical properties of ferrous components in a specific area. Baoding Guokun typically apply the induction hardening process to the powertrain, suspension, engine components, casting, forging and stampings, such as gears, shafts, axles, cam lobes, etc

Benefits of induction hardening

1. The heat source is located on the surface of the customized products, with fast heating speed and high thermal efficiency.
2. The custom spare parts has small deformation due to surface heating.
3. The heating time is short, so the surface oxidation and decarburization is lower than normal heat treatment, such as quenching, normalization, tempering, etc
4. High surface hardness, small notches, improved wear resistance, saving material consumption.

Baoding Guokun Machinery Co., Ltd and Baoding Guokun Export and Import Trading Co., Ltd are located in Baoding city, Hebei province, China. Our sand casting factory occupies a total area of 30,000 square meters, which have casting foundry workshop, grinding, sandblasting and precision machining shop, laboratory and warehouse. Baoding Guokun has equipped with 4 sets medium-frequency electric furnaces, 15 sets automatic shell core machinery, automatic sand casting molding line, 7 sets CNC machinery, 20 sets CNC Lathe, and the complete quality inspection devices for mechanical testing and chemical analysis, including tensile strength, hardness tester, metallographic inspection, spectrometer, ultrasonic testing and special testing devices. Before shipping, the quality reports for all inspection will be issued and mailed to our customers.

Self-hardening furan resin sand casting process
Why phosphoric acid is mostly used as a curing agent for high nitrogen furan self-hardening resins, 
but seldom used as a curing agent for low nitrogen furan self-hardening resins?
 This is because low nitrogen and high furfuryl alcohol resin, when acid is used as curing agent, the hardening speed is slow, 
the demolding time is long, and the strength is very low. 
The high nitrogen low furfuryl alcohol resin uses phosphoric acid as the curing agent to obtain the required curing speed. 
In addition, the high nitrogen low furfuryl alcohol resin uses phosphoric acid as a catalyst to obtain good final strength.
The reason for this result is mainly due to the poor miscibility of phosphoric acid and furfuryl alcohol and high affinity with water, 
which makes it difficult for the water contained in the resin and the catalyst and the water produced in the resin polycondensation reaction to diffuse. 
And discharged, with phosphoric acid as the core. 
Water droplets remain in the resin film and destroy the compactness of the resin film, so the strength is low. 
The high nitrogen resin has good mutual solubility with water, and various waters are not easy to be concentrated into droplets with phosphoric acid as the core. 
The resin film has a good structure and high strength.

Baoding Guokun specialized in sand molded casting, green sand casting, resin sand casting, precoated sand casting, shell molding casting with grey iron, ductile iron, cast iron, cast steel, cast aluminum, bronze, brass, copper with high quality and competitive prices and high quality. All of our customized metal castings are manufactured accoridng to custoer's requirements, drawings, design or samples.

EN-GJL-150 or EN 1691 GG 15 grey cast iron
EN-GJL-150 is one of grey cast iron in European standard EN 1561, it is also named as gray cast iron GG15 in standard DIN 1691 by Germany and Austria.

The Grade is equivalent with grey iron GB/T 9439-1988 HT150, ASTM A 48, class 20, JIS G5501 FC15, NFA32-101 Ft.15D, BS1452 Gr.150, ISO/R185 Gr.15 in China and other countries.

The chemical composition of GG15 gray cast iron is not standard. Baoding Guokun, the professional China casting foundry can adjust the chemical composition according to the production conditions, as long as we coouold meet the mechanical properties.

EN 1691 GG 15 Mechanical properties:
Tensile Strength: 150 Mpa min
Hardness: 150~200

Casting process for Gray iron GG15:
Shell mold casting
Sand casting
Precoated sand casting
Green sand casting

If you need custom grey iron castings for railway & train, auto parts, valve & piping, mining, heavy engineering, industrial engineering, engineering & construction, please contact tina@guokuncasting.com to get the competitive prices.

ASTM A216 specification covers carbon steel castings for valves, flanges, fittings, or ther pressure-containing parts for high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.
ASTM A216, WCA, WCB, WCC will be selected as per the design and service conditions, mechanical properties, and the high temperature characteristics.
Today, we would like to introduce ASTM A216 WCB carbon steel.

Chemical Composition:
C%: 0.30 max; Mn%: 1.00 max; Si%: 0.60 max; S%: 0.045 max; P%: 0.040 max; Cu%: 0.30max; Ni%: 0.50 max; Cr%: 0.50 max; Mo%: 0.20 max

Mechanical Properties:
Tensile strength: 485-655 Mpa
Yield strength: 250Mpa min
Elongation: 22% min
Reduction of area: 35% min

Heat Treatment process:
Generally, all ASTM A216 WCB carbon steel castings need to be anneal or nomalization.
Anneal at 890-910°C
Normalization at 870-890°C

Casting process:
Sand casting
Investment casting
Shell mold casting

Guokun Casting, of Baoding Hebei is an ISO 9001-2008 registered iron and steel foundry & supplier of high quality carbon steel, alloy steel, stainless steel, wear resistant steel castings, gray iron casting, ductile iron casting, protype castings and machhined castings used in Power, Mining, Transporation, Agricultural, Automobile, bus and truck parts, valves, oil & Gas steel castings, Pipe Fittings and Gear Industry.

With a montly capacity of 10,000kgs and with more than 15 years of experience ensure the short delivery and the highest valued iron & steel casting parts.

Ours Mission

It is our mission to provide flexible, cost effective solutions for our customers on time, every time while maintaining the highest standrds of quality.

If you need any custom steel casting components, please contact gina@guokuncasting.com or gina.guokun@gmail.com to get the competitive prices!

Gray iron castings in ASTM A48 Class 20
Gray iron castings in ASTM A48 Class 20 are intended for general engineering use where tensile strength is a major consideration. 
The grade is equivalent with grey irn GB/T 9439-1988 HT150, DIN 1691 GG15, JIS G5501 FC15, NFA32-101 Ft.15D, BS1452 Gr.150, ISO/R185 Gr.15 in China and other countries.

Chemical Composition:
C:3.0～3.6 S:≤0.12 P：<0.15 Mn：0.6～1.0 Si：1.4～2.0
Please note that this chemical composition is not standard, just from working experience of our iron casting foundry.

Mechanical properties
ASTM A48 Class 20 gray iron has a minimum tensile strength of 20,000 psi (140 MPa). Class 20 has a high carbon equivalent and a ferrite matrix.

Grey cast iron ASTM 148 Class 20 can be produced by using the following casting process:
Sand casting
Shell mold casting
Lost foam casting

The custom casting components in ASTM A48 Class 20 are these unimportant casting parts with low duty or load, such as boiler parts, covers, wheel, base plate, weight plate, pump body, valve body, pipe fittings, etc

Modeling Machine
1.Casting equipment for making sand moulds. 
Its main functions are filling sand, filling loose sand into the sand box; compacting sand, compacting sand, compacting loose sand in the sand box through different methods such as compaction, compaction, shock compression, injection pressure, so that the sand mould has the necessary strength in the process of handling and pouring; lifting the mould, using different mechanisms to take the sample out of the compacted sand mould. The moulding machine first appeared in the mid-19th century. In the early stage, the moulding machine was a simple mechanism for manual compaction to take up moulds. Later, compressed air was used as the driving force for shaking and compacting moulding sand. The shock moulding machine appeared in 1890, which improved the moulding efficiency and the precision of sand moulds. According to the different methods of compacting moulding sand, moulding machine can be divided into three types, vibro-compacting type, vibro-compacting type and compacting type.

2. The compact sand moulds can be obtained by compacting the compacted sand moulds with the shock moulding machine. The commonly used is the micro-vibration compacting moulding machine (see figure), which uses the falling table to collide with floating vibrating iron, and then compacts the moulding sand by micro-vibration compacting. Micro-shock is a kind of vibration with high frequency (500-1000 times per minute) and small amplitude (5-25mm) instead of low frequency (60-120 times per minute) and large amplitude. The sand moulds produced by this moulding machine are of good quality and have low requirements for foundation.

If you need sand casting components, shell mold casting, resin sand casting, and investment casting process, please feel free to contact tina@guokuncasting.com

Why improving the density of steel castings?

When manufacturing the custom steel casting components, Baoding Guokun will carry out the heat treatment process to improve the quality and performance of steel castings.
Actually, the process of water-cooling heat treatment can improve the density of steel parts, which making the inner structure of casted parts more compact.
Please check the following advantages of improving the density of steel castings:

1. If the density of steel castings is higher, the casting defects, such as blow holes, cracks, will be less. Then it will help us to reduce the scrap rate.
2. If improve the density of precision steel castings, the inner structure of investment casting will be much better to improve the casting's quality and service life.
3. It helps to improve the steel precision casting's ductility.

If you need high quality steel casting, lost-wax investment casting, please contact tina@guokuncasting.com or call us 86-15168139710.