Anchor Bolt

Product Name: Foundation anchor bolt
Key Words: L shape bolt, anchor bolt for construction, China factory L anchor bolt
Size: M6-M72
Material: Q195, Q235, 35K, 45#, SUS304, SUS316
Strength Grade: Grade 4.8, 5.8, 6.8, 8.8, A2-70, A4-80
Surface Treatment: carbon steel zinc plated, HDG, stainless steel
Thread Length: Half Thread
Packing: Pallets, Bundle with bag
Application: construction, new energy industry, auto industry, etc
Other Features: Offer customized head mark

Detail

Thread specifications and performance levels for matching anchor bolt types

Anchor bolt type	thread specification	Performance Level
L-type	M20～M48	4.6grade、5.6grade、8.8grade
J-type	M20～M48	4.6grade、5.6grade、8.8grade
T-type	M27～M100	4.6grade、5.6grade、8.8grade
I-type	M20～M80	8.8grade、10.9grade
I-type	M20～M100	4.6grade、5.6grade、8.8grade
-In areas with extreme minimum temperatures of 30 ℃ and below, transmission towers should use grade 8.8 anchor bolts.
I type (double headed) anchor bolts are preferred for grades 8.8 and 10.9.

Anchor bolt material

Performance Level	Materials and heat treatment	Chemical composition limit (melting analysis) %					Tempering temperature ℃	Recommended materials
		C		P	S	Ba	Tempering temperature ℃	Recommended materials
		Min	Max	Max	Max	Max	Min	the name of a shop	Applicable specifications	Standard number
4.6grade	Carbon steel or carbon steel with added elements	——	0.55	0.045	0.050	—	——	——	—	—
5.6grade	Carbon steel or carbon steel with added elements	0.13	0.55	0.045	0.050	——		—	——	—

DL/T 1236—2021

Performance Level	Materials and heat treatment	Chemical composition limit (melting analysis) %					Tempering temperature ℃	Recommended materials
		C		P	S	Ba
		Min	Max	Max	Max	Max	Min	the name of a shop	Applicable specifications适用规格	Standard number
8.8gradeb	Quenching and tempering of alloy steel	0.20	0.55	0.025	0.025	0.003	500	40Cr	≤M30	GB/T 3077
								42CrMo 40CrNiMo	>M30
10.9gradeb	Quenching and tempering of alloy steel	0.20	0.55	0.025	0.025	0.003	500	35CrMo	≤M30	GB/T 3077
								42CrMo、40CrNiMo	>M30
The content of boron can reach 0.005%, and its non effective boron can be controlled by adding titanium (or) aluminum. The materials used for grade 8.8 and 10.9 anchor bolts should have sufficient hardenability to ensure that the threaded section core obtains about 90% martensitic structure after quenching and before tempering.