Gray iron castings are general engineering gray iron castings that are mainly used for tensile strength. The castings are graded according to the tensile strength of different casting bars. Gray cast iron castings for motor vehicles are gray cast iron castings suitable for use in sand casting, used in automobiles, tractors and related industries. What are the requirements for the hardness of gray cast iron castings for motor vehicles? Below, Xiaobian gives you a detailed description of the hardness requirements and specific instructions for gray cast iron castings for motor vehicles.
The order contract shall include the following terms:
* Whether special heat treatment is required.
* The surface on which the hardness test is performed.
* The required surface hardening depth and surface hardness.
Hardness requirements for grey cast iron castings for motor vehicles:
The foundry shall adopt the necessary control and inspection techniques to ensure that the casting meets the specified hardness range. Brinell hardness is tested according to ASTM E10 test method after the surface of the casting has been removed with sufficient thickness to ensure representativeness of the hardness reading. Unless otherwise agreed, 10 mm steel balls and 3000 kg load shall be used. The area of hardness measured on the casting and its location shall be agreed between the supplier and the buyer and marked on the drawing.
Gray iron grade, hardness range, 10 mm steel ball, 3000 kg test force to obtain the number of millimeters of Brinell indentation diameter (BID) and metallurgy are as follows:
Brand | Hardness range of castings and diameter of Brinell indentation | Description |
G1800 G2500 G3000 G3500 G4000 | HB187 largest 4.4BID minimum or by agreement HB170-229 4.6—4.0BID or by agreement HB187-241 4.4-3.9BID or by agreement HB207-255 4.2—3.8 BID or by agreement HB217-269 4.1—3.7BID or by agreement | Ferrite - pearlite Pearlite - ferrite Pearlite Pearlite |
The grades and hardness requirements for the brake hub and clutch friction plate under heavy load are as follows:
Brand | Carbon, minimum % | Casting hardness and indentation diameter | |
G2500a G3500b G3500c | 3.40 3.40 3.50 | HB170-229 4.6-4.0BID or by agreement HB207-255 4.2-3.8BID or by agreement HB207-255 4.2-3.8BID or by agreement |
Note: Alloy grey iron motor camshaft grade is G4000d, casting hardness - according to the agreement between the supplier and the buyer, the hardness measured on the support surface is 241-2321HB.
Concerned about surprises
Tagged with: Casting Gray iron Pearlite Indentation diameter Factory shop
Previous: How to buy a quenching furnace? Next: Home decoration save money, four strokes to control the cost of wooden door painting
September 29, 2023
September 29, 2023
Mail an Lieferanten
September 29, 2023
September 29, 2023
Hebei Chunfeng International Trade Co., Ltd. ist eine hundertprozentige Tochtergesellschaft der Chunfeng Industrial Group. Die Chunfeng -Gruppe, die 1972 gefunden wurde, haben jetzt 50 Jahre... NewsLetter
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Fill in more information so that we can get in touch with you faster
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
