B21 C48500 - ASTM B21/B21M-2020 - H2ABC

中文版

Grade	B21 C48500
Corresponding Standard	ASTM B21/B21M-2020 Standard Specification for Naval Brass Rod, Bar, and Shapes
Classification	Copper and Copper Alloys

B21 C48500 Chemical Element Composition Content (%)

Component	Fe	Cu	Pb	Sn	More
Minimum Value	-	59	1.3	0.5	Zn:余量
Maximum Value	0.1	62	2.2	1	Zn:余量

B21 C48500 Mechanical Properties

Diameter or Distance Between Parallel Surfaces d mm mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
Bars, rods, profiles; all specifications	Hot Extrusion (M30)	≥360	≥140	≥20
Bars, rods; d≤25	Softening Annealing (O60)	≥370	≥140	≥20
Strip, bar; 25 < d ≤ 50	Softening Annealing (O60)	≥360	≥140	≥20
Bars, wire rods; d>50	Softening Annealing (O60)	≥345	≥140	≥20
Bar-shaped profiles; All sizes	Softening Annealing (O60)	≥360	≥140	≥20
Bars, rods; d≤25	Light Annealing (O50)	≥415	≥185	≥12
Strip, bar; 25 < d ≤ 50	Light Annealing (O50)	≥400	≥180	≥20
Bars, wire rods; 50<d≤75	Light Annealing (O50)	≥370	≥170	≥20
Bars, wire rods; 75<d≤100	Light Annealing (O50)	≥370	≥150	≥20
Bars, wire rods; d>100	Light Annealing (O50)	≥370	≥150	≥20
Profiles; All sizes	Extrusion and drawing (H50)*	≥400	≥170	≥15
Bars, rods; d≤25	Half-Hard (H02)	≥415	≥185	≥12
Strip, bar; 25 < d ≤ 50	Half-Hard (H02)	≥400	≥180	≥20
Bars, wire rods; 50<d≤75	Half-Hard (H02)	≥370	≥170	≥20
Bars, wire rods; 75<d≤100	Half-Hard (H02)	≥370	≥150	≥20
Bars, wire rods; d>100	Half-Hard (H02)	≥370	≥150	≥20
Bars, rods; d≤25	Hard (H04)	≥460	≥310	≥10
Strip, bar; 25 < d ≤ 50	Hard (H04)	≥425	≥255	≥13

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