High-Leaded Tin Bronzes

Product Detail

High-Leaded Tin Bronzes: 

Alloy Nos. C93200, C93400, C93500, C93700, C93800, C94300

  The family of high-leaded tin bronzes include the workhorses of the bearing bronze alloys. Alloy C93200 has a wider range of applicability, and is more often specified, than all other bearing materials. It, and the other high-leaded tin bronzes are used for general utility applications under medium loads and speeds, i.e., those conditions which constitute the bulk of bearing uses. Strengths and hardnesses are somewhat lower than those of the tin bronzes but this group of leaded alloys excel in their antifriction and machining properties.

  As with other bearing bronze families the differences among individual alloys are minor. Alloy C93200 utilizes a combination of tin and zinc for cost-effective strengthening while C93700 relies solely on tin to obtain the same strength level. In addition to its good strength, Alloy C93700 is known for its corrosion resistance to mildly acidic mine waters, and to mineral waters and papermill sulfite liquors. Wear resistance is good at high speeds and under high-load, shock and vibration conditions. The alloy has fair casting properties, something to be considered when large or complex bearing shapes must be produced. Alloy C93700 contains enough lead to permit use under doubtful or interruptible lubrication, but it must be used with hardened shafts. The lead addition makes these alloys easy to machine.

  High strength is sacrificed for superior lubricity in the bronzes containing 15 and 25 percent lead, Alloys C93800 and C94300. These high-leaded tin bronzes embed dirt particles very well and conform easily to irregularities in shaft surfaces and permit use with unhardened shafts. As in all leaded bronzes the lead is present as discrete microscopic particles; in alloys C93800 and C94300 there is ample lead available to smear onto the journal to prevent welding and seizing, should the lubricant supply be interrupted. The lead also provides excellent machinability. 

  Because of their comparatively lower strength and somewhat reduced ductility Alloys C93800 and C94300 should not be specified for use under high loads or in applications where impacts can be anticipated. They operate best at moderate loads and high speeds, especially where lubrication may be unreliable. They conform well and are very tolerant of dirty operating conditions, properties which have found them extensive use in offhighway, earthmoving and heavy industrial equipment.

Construction:Tube(Pipe)?Rod(Bar)?Plate(Sheet)

Shape:Round, Square, Flat, Hexagon, Oval,Half-round or Customized

Dimension:Customized

Standard:GB/T,JIS,ASTM, ISO, DIN, BS, NF etc.

Place of origin:Jiangsu, China

Package:Wooden case or as per customer requirement

Surface:as required

MOQ:500kg or Negotiable

Deliver time:According to order's quantity.

Shipment:By sea, by air, DHL, UPS, FedEx etc. or as required

Chemical Composition % by weight:

Element (Greade)		?	?	?	?	?	?	?	?	?	?	?
		Al	Sb	Cu	Fe	Pb	Ni	P	Si	S	Sn	Zn
C93200	Nom	-	-	83	-	7	-	-	-	-	6.7	3
	Min	-	-	81	-	6	-	-	-	-	6.3	2
	Max	0.005	0.35	85	0.2	8	1	0.15	0.005	0.08	7.5	4
C93400	Nom	-	-	83	-	8	-	-	-	-	8	-
	Min	-	-	82	-	7	-	-	-	-	7	-
	Max	0.005	0.5	85	0.2	9	1	0.5	0.005	0.08	9	0.8
C93500	Nom	-	-	84.5	-	9	-	-	-	-	5.15	-
	Min	-	-	83	-	8	-	-	-	-	4.3	-
	Max	0.005	0.3	86	0.2	10	1	0.05	0.005	0.08	6	2
C93700	Nom	-	-	80	-	10	-	-	-	-	10	-
	Min	-	-	78	-	8	-	-	-	-	9	-
	Max	0.005	0.55	82	0.15	11	1	0.15	0.005	0.08	11	0.8
C93800	Nom	-	-	77	-	14.5	-	-	-	-	6.9	-
	Min	-	-	75	-	13	-	-	-	-	6.3	-
	Max	0.005	0.8	79	0.15	16	1	0.05	0.005	0.08	7.5	0.8
C94300	Nom	-	-	69.5	-	25	-	-	-	-	5.3	-
	Min	-	-	67	-	23	-	-	-	-	4.5	-
	Max	0.005	0.8	72	0.15	27	1	0.05	0.005	0.08	6	0.8

• Applications:

C93200	General utility bearings, bushings and wear plate.
C93400	Bearings, bushings.
C93500	Bearings, bushings.
C93700	Bearings for high speed and heavy pressures, pumps, impellers, corrosion resistant applications, pressure tight castings.
C93800	Bearings for general service and moderate pressures, pump impellers and bodies for use in acid mine water. Turbocharger bearings.
C94300	High speed bearings for light loads

• Mechanical Properties(by Continuous Cast) ASTM B 505/B 505M-2005

	Hardness	Tensile Strength			Yield Strength		Elongation
Unit	BH	Ksi	Mpa	Ksi		Mpa	%
C93200	65	35	241	20		138	10
C93400	60	34	234	20		138	8
C93500	60	30	207	16		110	12
C93700	60	35	241	20		138	6
C93800	55	25	172	16		110	5
C94300	48	21	145	15		103	7