ADI 1600 Austempered Ductile Iron Pipe Fittings

Description:
Casting Material:	Austempered Ductile Iron, ADI 1600 / QTD 1600-1 / JS 1600-1 / EN-GJS 1600-2 / FCAD-1600-1 / ASTM A 897/M-16 1600-1
Design Software:	CAD, PRO/E, SolidWorks, UG
Casting Process:	Sand Coated Casting, Lost Foam Casting, Investment Casting
Heat Treatment：	Austempering
Machining:	Casting+CNC Machining
Surface finishing:	Shot blasting, Galvanized/Hot dip galvanized, Powder coated, Spray painting
Package：	Fumigation-free Pallet or Wooden Box

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Property	Value / Requirement	Unit	Remarks
Tensile strength Rm	≥ 1600	MPa	Mill test 1 600-1 720
Yield strength Rp0.2	≥ 1300	MPa	+100 MPa vs 2020 edition
Elongation after fracture A	≥ 2	%	Min. for grade QTD1600-2
Brinell hardness HBW	450-520	-	Guidance, wall ≤30 mm
Impact energy KV (un-notched, room temp.)	≥ 25	J	Mill test 25-40
Rotating-bending fatigue limit σw	680-780	MPa	~10 % above QTD1400
Contact fatigue limit σH	2300-2700	MPa	Above carburized & nitrided steels
Modulus of elasticity E	≈ 169	GPa	Same as lower grades
Density ρ	7.1	g·cm⁻³	~10 % lighter than steel
Graphite nodularity	≥ 85	%	GB/T 24733-2023 requirement
Graphite count	≥ 100	pcs/mm²	Same as above
Matrix structure	Fine ausferrite + trace carbides	-	Other phases <5 %

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