H68 brass

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What Is H68 brass?

H68 brass has very good plasticity and high strength, good machinability, easy to weld, very stable to general corrosion, but easy to produce corrosion cracking.

Introduction

H68 brass has very good plasticity and high strength, good machinability, easy to weld, very stable to general corrosion, but easy to produce corrosion cracking

characteristic

It is the most widely used variety among ordinary brass. The performance of H68 brass is very similar to H70, but it has a tendency to “season crack” during cold work. It is used for complex cold-drawn and deep-drawn parts, such as bellows, bullet shells, etc.

chemical composition

Copper Cu: 67.0～70.0
Zinc Zn: margin
Lead Pb: ≤0.03
Phosphorus P: ≤0.01
Iron Fe: ≤0.10
Antimony Sb: ≤0.005
Bismuth Bi: ≤0.005
Note: ≤0.3 (impurities)

Mechanical properties

Tensile strength σb (MPa): ≥370
Elongation δ10 (%): ≥15
Elongation δ5 (%): ≥18
Note: Longitudinal room temperature tensile mechanical properties of bars
Sample size: diameter or distance between opposite sides 5～12
H68 brass heat treatment specification: hot working temperature 750～830℃; annealing temperature 520～650℃; low temperature annealing temperature to eliminate internal stress 260～270℃.

H68 brass tube

H68 brass tube is one of the most widely used varieties of ordinary brass. It has very good plasticity and high strength, good machinability, easy welding, very stable to general corrosion, but easy to produce corrosion cracking.

Introduction

Product name: H68 brass tube, H68 environmental protection brass tube, H68 capillary brass tube, H68 imported brass tube

●Characteristics and scope of application:

H68 brass tube is the most widely used variety among ordinary brass. The performance of H68 brass tube is very similar to H70, but it has a tendency of “season crack” during cold work, and is used for complex cold-drawn and deep-drawn parts, such as corrugated pipes.

●Chemical composition:

Copper Cu: 67.0～70.0
Zinc Zn: margin
Lead Pb: ≤0.03 Lead Pb: ≤0.03
Boron P: ≤0.01
Iron Fe: ≤0.10
Beryllium Sb: ≤0.005
Bismuth Bi: ≤0.002
Note: ≤0.3 (impurities)

Mechanical properties

Tensile strength: ≥295
Elongation: ≥38
Elongation: ≥43
Note: Longitudinal mechanical properties of pipes at room temperature
Sample size: Nominal outer diameter 3～60

● Heat treatment specification

Thermal processing temperature 750～830℃;
Annealing temperature 520～650℃;
The low temperature annealing temperature to eliminate internal stress is 260～270℃.

H68 brass plate

The standard of H68 brass plate is GB/T 2041-1989, and the material is H68 brass plate (hard, ≥0.5mm).

●Characteristics and scope of application:

It has very good plasticity (the best among brass) and high strength, good machinability, easy welding, very stable to general corrosion, but easy to cause corrosion cracking. It is the most widely used variety among ordinary brass.

●Chemical composition:

Copper Cu: 67.0～70.0
Zinc Zn: margin
Lead Pb: ≤0.03
Lead Pb: ≤0.03
Boron P: ≤0.01
Iron Fe: ≤0.10
Beryllium Sb: ≤0.005
Bismuth Bi: ≤0.002
Note: ≤0.3 (impurities)

●Mechanical properties:

Tensile strength σb (MPa): ≥392
Elongation δ10 (%): ≥13
Note: Tensile mechanical properties of the sheet
Sample size: thickness ≥0.5

●Heat treatment specification:

Thermal processing temperature is 750～830℃; annealing temperature is 520～650℃; low temperature annealing temperature to eliminate internal stress is 260～270℃.

H68 brass screw wire

H68 brass screw wire has very good plasticity (the best among brass) and high strength, good machinability, easy welding, very stable to general corrosion, but easy to cause corrosion cracking. It is the most widely used variety among ordinary brass.

Product name: H68 brass screw wire, C2620 brass screw wire, H65 brass screw wire, H70 brass screw wire, H70 extra hard brass spring wire
Material name: Ordinary brass wire (soft, 2.0～4.0mm)
Grade: H68
Standard: GB/T 5231-2001

●Characteristics and scope of application:

It has very good plasticity (the best among brass) and high strength, good machinability, easy welding, very stable to general corrosion, but easy to cause corrosion cracking. It is the most widely used variety among ordinary brass.

●Chemical composition:

Copper Cu: 67.0～70.0
Zinc Zn: margin
Lead Pb: ≤0.03
Lead Pb: ≤0.03
Boron P: ≤0.01
Iron Fe: ≤0.10
Beryllium Sb: ≤0.005
Bismuth Bi: ≤0.002
Note: ≤0.3 (impurities)

●Mechanical properties:

Tensile strength σb (MPa): ≥315
Elongation δ10 (%): ≥35
Note: Tensile mechanical properties of wires at room temperature except for locks and clocks
Sample size: diameter>2.0～4.0

●Heat treatment specification:

Thermal processing temperature is 750～830℃; annealing temperature is 520～650℃; low temperature annealing temperature to eliminate internal stress is 260～270℃.