C93800, Lead Tin Bronze Casting, ASTM B584

C93800 — Lead Tin Bronze Casting. ASTM B584
STEELMAX Metal Story

동 (Copper : Cu) : 78%, 주석 (Tin : Sn) : 5%,
납 (Lead : Pb) : 15% Nominal 함량인 납청동 (연입청동)입니다.

ASTM B584 에서 High-lead tin bronze로 분류하고
UNS No. C93800, Commercial Designation 78-7-15, 이라고 표기합니다.

ASTM B584 는 Standard Specification for Copper Alloy Sand
Casting for General Applications 규정입니다.

Typical application : Bearing for general service at moderate pressures,
pump, impellers, and bodies for use in acid mine water.

JIS에서는 납청동 주물 4종 CAC604 (LBC4) 으로
면압이 높은 베어링에 적합하고,

친밀성이 좋은 연청동이고
CAC603C보다, 친밀성이 더 좋은 금속으로 나타냅니다.

(Suitable for bearing of high surface pressure and good in conformability,
Better in conformability than CAC603C)

Pb (납)이 금속 조직 내에 고용되지 않고, 결정 입계에 존재해
윤활성이 좋으므로, 이 성질을 이용한 금속입니다.

LEAD TIN BRONZE CASTING
Copper Alloy UNS No.			C93800
JIS Symbol		OLD	LBC4C (4종)
JIS Symbol		NEW	CAC604C
Chemical Composition (%)	Main	Copper (Cu)	74.0~78.0
		Tin (Sn)	7.0~9.0
		Lead (Pb)	14.0~16.0
	Residual	Zinc (Zn)	1.0 max
		Iron (Fe)	0.3 max
		Antimony (Sb)	0.5 max
		Nickel (Ni)	1.0 max
		Phosphorus (P)	0.5 mx
		Aluminum (Al)	0.01 max
		Silicon (Si)	0.01 max
0.2% Proof Stress (N/㎟)		JIS/KS	100 min
Tensile Strength (N/㎟)		JIS/KS	220 min
Tensile Strength (N/㎟)		ASTM	179 min
Chemical Composition unit(%). ASTM Nominal
ASTM B584, JIS H 5120/5121, KS D 6024/6025