December 24, 2018

Alloy Steel BS3146 CLA 3

Type CLA 3 is British low alloy steel for investment casting manufacture process only; it’s used for structure and engineering purposes.

BS 3146-1 Specification for Investment Castings in metal; Part 1: Carbon and low alloy steels

BS3146 Type CLA 3 Casting Chemical Requirements Composition: the manufacturer shall select the composition to obtain the mechanical properties required.

CLA 30.0350.035

BS3146 Type CLA 3 Casting Mechanical Properties at Ambient Temperature:

SteelTensile Strength
MPa, min
0.2% Proof Stress
Mpa, min
A %, min
Izod Impact Strength,
ft/lbf, min
CLA 3700-8504951125

       1MPa = 1 N/MM2
       Ambient temperature is taken as 23±5 ºC

BS3146 Type CLA 3 Casting Hardness:

GradeHardness (HB)

BS3146 Type CLA 3 Casting Heat treatment process

Condition: The castings shall be supplied in the finally heat treated condition unless otherwise agreed by purchaser.

The final heat treatment shall consist of annealing, hardening and tempering.

Similar Steel: BS3100 Grade A6; EN 10293 Grade G28Mn6; ISO 9477 Grade 540-720

Manufacture Process: 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.

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