December 6, 2018

Alloy Steel ISO 9477 GR 840-1030

ISO9477 steel grade 840-1030 is one high strength popular steel material in casting purpose. Generally it’s low alloy carbon steel.

ISO 9477 – 2015 High strength cast steels for general engineering and structural purposes

Grade 840-1030 Casting Chemical Requirements and Mechanical Property:
All steel grade in ISO9477 has below chemical requirements:
Silicon: 0.60 max
Sulfur: 0.025 max
Phosphorus: 0.030 max

Other chemical composition shall be selected by an agreement between the manufacture and the purchaser. But the Carbon Equivalent (CE) is defined as bellows:

Recommend Chemistry based on our experience:
Chinese grade ZGD840-1030.

GradeC %Si %Mn %P %S %Cr %Ni %

Grade 840-1030 Casting Mechanical Properties at Ambient Temperature:

: 15J
       1MPa = 1 N/MM2
       Ambient temperature is taken as 23±5 ºC
Hardness reference: 260-325HBS

Grade 840-1030 Casting Heat treatment process: Generally all castings need Quenching and tempering or annealing+quenching+ tempering

Manufacture Process: Sand Casting, Precision Lost Wax Investment Casting.

Our Services

  1. 1
    Sand Casting

    Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.

    Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.

  2. 2
    Investment Casting

    Also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts and Titanium alloy by investment casting. It can achieve the best appearance with good tolerance

  3. 3
    Shell Casting

    Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.

  4. 4
    Rapid Prototyping.

    3D Printing and Rapid Prototyping service.

    3D Scanning by physical sample.

  5. 5
    CNC Machining

    CNC Milling, CNC Turning with 5 axis CNC center, we provide precision machining for all castings based on customers design drawings.

  6. 6
    CAD/CAM Design

    Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.

  7. 7
    Tools/Molds Design

    Mould design and production will be served for metal casting ad plastic injection industry.  Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.


What makes Casting Quality the best?


Our engineers are more than just designers….they’re pioneers. Our team use CAD/CAM to do the simulation of casting parts .Through the advanced technology, we can know the weight and structure . We also visited so many factories to know their difference and improve our products every year.


We’re obsessed with quality. Casting Quality constantly strives to exceed our customers’ expectations in durability and performance. In fact, we will control the whole process from the original material to the finished parts , include the technology .Uniquely-designed Quality Control System focuses on ensuring four product goals: 1) Eligible Chemistry , 2) Hardness 3) Property and 4) Affordable Pricing. The result is the best casting products value in the industry.


We’re in Qingdao,China, It has convenient transportation of road and sea. Courteous service is part of who we are, and we do it better than anyone in the industry. With Casting Quality you can expect friendly, knowledgeable, and prompt customer service.


Shipping orders complete and on-time is of paramount importance to our customers. We will count the delivery date and result before accept your order.  Casting Quality consistently ranks as one of the best in speed of delivery and fill rates.

Metal Castings

Alloy Steel

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