C22000 Brass Strip

Chemical Composition

Alloy Grade	Cu	Fe	Pb	Ni	Zn	Impurity
C28000	57.0-60.0	0.3	0.5	0.5	margin	1
C28000	60.5-63.5	0.15	0.08	0.5	margin	0.5
C27000	63.5-68.0	0.1	0.03	0.5	margin	0.3
C26200	67.0-70.0	0.1	0.03	0.5	margin	0.3
C26000	68.5-71.5	0.1	0.03	0.5	margin	0.3
C24000	79.0-81.0	0.1	0.03	0.5	margin	0.3
C23000	84.0-86.0	0.1	0.03	0.5	margin	0.3
C22000	88.0-91.0	0.1	0.03	0.5	margin	0.2
C21000	95.0-97.0	0.1	0.03	0.5	margin	0.2

Mechanical Properties

Alloy Grade	Melting Temperature ℃		Boiling Point ℃	Density kg·（kg·mˉ3）	C  J·（kg·℃）ˉ1	Coefficient  of Linear  Expansion	Thermal Conductivity W·（m·K）ˉ1	Conductivity %IACS	Conductivity %IACS		Resistivity μΩ·m
	Liquidus	Solidus							Solid state	Liquid state
C28000	896	886		8400		21.0X10ˉ6	125.1				0.0025
C28000	906	899		8430		20.6X10ˉ6	116.7	27	0.071		0.0017
C27000	936	906		8470		20.1X10ˉ6	116.7	27	0.067
C26200	939	910		8500		20.0X10ˉ6	116.7	27	0.064		0.0015
C26000	951	916	≈ 1150	8530	0.09	19.9X10ˉ6	120.9	28	0.062	0.39	0.0015
C25000	981.2			8630		19.6X10ˉ6	120.9	30	0.057
C24000	1001.2	966	≈ 1240	8660	0.093	19.1X10ˉ6	141.7	32	0.054	0.33	0.0015
C23000	1026.3	991	≈ 1300	8750	0.095	18.7X10ˉ6	151.7	37	0.047	0.29	0.0016
C22000	1046.4	1026.3	≈ 1400	8800	0.095	18.4X10ˉ6	187.6	44	0.04	0.27	0.0018
C21000	1071.4	1056.4	≈ 1600	8850	0.093	18.0X10ˉ6	243.9	57	0.031	0.24	0.0027

Introduction

Copper plate is a highly stable, low maintenance roofing and curtain wall material that is environmental, safe to use, easy to process and highly resistant to corrosion. A stable protective layer allows the life of the copper plate to exceed 100 years. The economic performance of copper plate is one of the best metal roofing materials.

1) The yield strength of the copper plate is inversely proportional to the elongation. The hardness of the copper plate after bending processing is extremely high, but it can be reduced by heat treatment.

2) Among all the metal materials used in construction, copper has the best extension properties and has great advantages in architectural modeling.

3) The copper plate is not limited by the processing temperature, and is not brittle at low temperature, and can be hot-melt welded by oxygen blowing at a high melting point.

4) Fireproof, non-combustible material.

5) Even in extremely corrosive atmospheres, copper plates form a strong, non-toxic passivation protective layer, which is commonly called "verdigris." The chemical composition depends on the air conditions in the area, but the "verdigris" of various compositions has the same protective effect on the copper. This layer of passive film is very stable and can be repaired automatically by damage. It is difficult to distinguish with the naked eye.

Application

The copper plate has excellent processing adaptability and strength, and is suitable for arcing, trapezoidal, cornering etc. in various processes and systems such as a flat lock system, a vertical edge occlusion system, a BEM system, a unit wall plate, and a rain drainage system.

 A variety of surface treatments to meet different architectural needs.

(1) A copper oxide sheet can form a uniform brown appearance.

(2) The patina board is used for renovation of old buildings or new construction with special requirements.

(3) The original copper plate has a gradual change in metallic luster, making the building as life-like.

(4) Tin-copper plate can achieve the effect of titanium-zinc plate.