C90300 (SAE620) Navy G Bronze / C903 High Tin Bronze

C90300 SAE 620 Tin Bronze is often used in high load, low speed applications. C903 Bronze has excellent wear properties. As the name may imply "Navy G" bronze is used in various marine applications due to its excellent resistance to corrosion. A member of the High Tin Bronze Alloy family C90300 Bronze is used in similar ways as the other alloys of this family.

Shapes

Solid Round Bar Stock

Applications

• Gears
• Worm Gears
• Valves
• Seal Rings
• Pump Impellers
• Valve Bodies
• Bushings

Specifications

Chemical Composition
(%max., unless shown as range or min.)

	Cu(1)	Al	Sb	Fe	Pb	Ni(2)	P(3)	Si	S	Sn	Zn
Min./Max.	86.0-89.0	.005	.20	.20	.30	1.0	.05	.005	.05	7.5-9.0	3.0-5.0
Nominal	87.5	-	-	-	-	-	-	-	-	8.3	4.0

Mechanical Properties (measured at room temperature, 68 F (20 C)

Temper	Section Size	Cold Work	Typ/ Min	Temp	Tensile Strength	Yield Strength (0.5% ext. under load)			El	Rockwell Hardness					Brinell Hard.		Shear Strength	Fatigue Strength*
	in.	%		F	ksi	ksi			%	B	C	F	30T		500	3000	ksi	ksi
	mm.			C	MPa	MPa											MPa	MPa
As Sand Cast
M01	0.0	0	TYP	68	45	21			30	-	-	-	-		70	-	-	-
	0.0			20	310	145			30	-	-	-	-		70	-	-	-
As Centrifugal Cast
M02	0.0	0	TYP	68	45	21			30	-	-	-	-		70	-	-	-
	0.0			20	310	145			30	-	-	-	-		70	-	-	-
M02	0.0	0	SMIN	68	40	18			20	-	-	-	-		-	-	-	-
	0.0			20	275	125			20	-	-	-	-		-	-	-	-
As Continuous Cast
M07	0.0	0	SMIN	68	44	22			18	-	-	-	-		-	-	-	-
	0.0			20	303	152			18	-	-	-	-		-	-	-	-
As Sand Cast
M01	0.0	0	SMIN	68	40	18			20	-	-	-	-		-	-	-	-
	0.0			20	276	124			20	-	-	-	-		-	-	-	-