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1.carry out the ASTMB107 Standards.
2.designation: AZ31B, AZ31S, AZ61A, AZ80A, AZ91D.
3.chemical compsition :Mg, Al, Zn, Mn, Si, Fe, Ca, Cu, Ni.
4.the maximum length :6000mm,the diameter range: 60mm-500mm

Designation	（%）Chemical composition
	Mg	AL	Zn	Mn	Si	Fe	Cu	Ni	Be
AZ31B	Balance	2.5—3.5	0.60—1.4	0.20—1.0	≤0.08	≤0.003	≤0.01	≤0.001	—
AZ31S	Balance	2.4—3.6	0.50—1.5	0.15—0.40	≤0.10	≤0.005	≤0.05	≤0.005	—
AZ61A	Balance	5.8—7.2	0.40—1.5	0.15—0.50	≤0.10	≤0.005	≤0.05	≤0.005	—
AZ80A	Balance	7.8—9.2	0.20—0.8	0.12—0.50	≤0.10	≤0.005	≤0.05	≤0.005	__
AZ91D	Balance	8.5—9.5	0.45—0.90	0.17—0.40	≤0.08	≤0.004	≤0.025	≤0.001	0.0005-0.003