C1720 C1720 P C1720 R - JIS H 3130-2018

Grade	C1720
Other Names
Corresponding Standard	JIS H 3130-2018 Copper beryllium alloy, copper titanium alloy, phosphor brozne, copper-nickel-tin alloy and nickel silver sheets, plates and strips for springs
Classification	Copper and Copper Alloys
Properties	Elasticity Corrosion Resistance Fatigue Resistance

C1720 Chemical Element Composition Content (%)

Component	Be	More
Minimum Value	1.8	Cu+Be+Ni+Co+Fe≥99.5；Ni+Co≥0.2；Ni+Co+Fe≤0.6
Maximum Value	2	Cu+Be+Ni+Co+Fe≥99.5；Ni+Co≥0.2；Ni+Co+Fe≤0.6

C1720 Mechanical Properties

condition	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-O,C1720 R-O	Annealing (O)	410~540	-	≥35	HV 90~160
Plates (P), Strips (R); 0.10≤t≤1.6	C 17200 P-1/4H,C1720 R-1/4H	1/4 Hard (1/4H)	510~620	-	≥10	145~220
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-1/2H,C1720 R-1/2H	1/2 Hard (1/2H)	590~695	-	≥5	180~240
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-H,C1720 R-H	Hard (H)	685~835	-	≥2	210~270
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-O,C1720 R-O	Annealing (O)	≥1100	≥960	≥3	≥325
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-1/4H,C1720 R-1/4H	Cold work hardening 1/4 hard (1/4H)	≥1180	≥1030	≥2	≥350
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-1/2H,C1720 R-1/2H	Cold work hardening 1/2 hard (1/2H)	≥1240	≥1100	-	≥360
Plates (P), Strips (R); 0.10≤t≤1.6	C 1720 P-H,C1720 R-H	Cold work hardening hard (H)	≥1270	≥1140	-	≥380
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-OM,C1720 R-OM	OM	640~885	≥480	≥18	≥200
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-1/4HM,C1720 R-1/4HM	1/4HM	735~930	≥550	≥10	≥210
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-1/2HM,C1720 R-1/2HM	1/2HM	815~1010	≥650	≥8	≥240
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-HM,C1720 R-HM	HM	910~1110	≥750	≥6	≥270
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-XHM,C1720 R-XHM	XHM	1060~1290	≥900	≥2	≥315
Plate (P), strip (R); 0.10≤t≤0.6	C 1720 P-XHMS,C1720 R-XHMS	XHMS	1210~1400	≥1030	≥2	≥360

1 Approximate Comparison Table Processing of high copper alloy

China		Japan	United States		International Organization for Standardization		Russia
GB	ISC	JIS	ASTM	UNS	ISO	Numerical Grade	GOST
TBe1.9 QBe1.9	T17710	C1720 C17200	97.5Cu-1.9Be-.3Co-.2Ti	C17200	CuBe1.9CoTi	C17200	БрБНТ1.9

2 Approximate Comparison Table Processing of high copper alloy

China		Japan	United States		International Organization for Standardization		Germany		European Standard		Russia
GB	ISC	JIS	ASTM	UNS	ISO	Numerical Grade	DIN EN/DIN	W-Nr.	EN	Numerical Grade	GOST
TBe2 QBe2	T17720	C1720 C17200	97.8Cu-1.9Be-.3Co	C17200	CuBe2	C17200	CuBe2	C17200 2.1247	CuBe2	CW101C	БрБН2

C1720 Corresponding Standards(Same grade name, different standards)

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