Materials

385 Brass

Overview

Kormax 385 brass comes in a range of bars, tubes, and rounds – including angle bars. Great for architectural and tooling usage, this metal is closely monitored throughout its extrusion to ensure the material is always up to the highest specifications. 385 has been developed for use where maximum machinability and longest tool life are essential. All extrusions are manufactured from continuous cast billet stock ensuring uniform dispersion of lead particles and freedom from porosity. Alloy 385 is susceptible to dezincification under certain conditions and is classified a category III alloy. Kormax brass can be custom cut to your requirements.

Common Applications

Architecture
Brass Fasteners
Electrical Parts
Hinges & Locks
Pins
Roof Flashings

Key Features

Superior machining characteristics
Long tooling life
Ideal for architectural applications

Material Profile

Profile
Size Range
Metric Size Range (mm)
Imperial Size Range (in)
NZ (Availability)
AUS (Availability)
Manufacturing Method
Solid Round Bar
See Size Range
3.18 to 152.40 (OD)
1⁄8 to 6 (OD)
Stocked
N/A
Extruded
Flat Bar
See Size Range
3.18 to 25.40 (T)
1⁄8 to 1 (T)
Stocked
N/A
Extruded
Flat Bar
See Size Range
6.35 to 152.4 (W)
¼ to 6 (W)
Stocked
N/A
Extruded
Square Bar
See Size Range
6.35 to 50.80 (T)
¼ to 2 (T)
Stocked
N/A
Extruded
Hex Bar
See Size Range
9.50 to 50.80 (A/F)
3⁄8 to 2 (A/F)
Stocked
N/A
Extruded
Angle Bar
See Size Range
1.59 to 6.35 (T)
1⁄16 to ¼ (T)
Stocked
N/A
Extruded
Diameter (mm)
Diameter (inch)
Weight (Kg/MTR)
3.18
1⁄8
0.07
5.00
-
0.17
6.35
¼
0.27
7.94
5⁄16
0.42
9.53
3⁄8
0.60
10.00
-
0.67
11.11
7⁄16
0.82
12.00
-
0.96
12.70
1⁄2
1.07
14.29
9⁄16
1.36
15.88
5⁄8
1.68
17.46
11⁄16
2.03
19.05
¾
2.42
20.64
13⁄16
2.83
22.23
7⁄8
3.29
23.81
15⁄16
3.77
25.40
1
4.29
28.58
1-1⁄8
5.43
30.16
1-3⁄16
6.06
31.75
1-¼
6.71
34.93
1-3⁄8
8.11
38.10
1-1⁄2
9.66
41.28
1-5⁄8
11.33
44.45
1-¾
13.14
50.80
2
17.17
57.15
2-¼
21.73
63.50
2-1⁄2
26.85
69.85
2-¾
32.46
76.20
3
38.66
82.55
3-¼
45.33
88.90
3-1⁄2
52.62
95.25
3-¾
60.35
101.60
4
68.72
127.00
5
108.00
152.40
6
156.00
T x W (mm)
T x W (inch)
Kg/MTR
3.18 X 6.35
1⁄8 X ¼
0.17
3.18 X 12.7
1⁄8 X 1⁄2
0.34
3.18 X 15.88
1⁄8 X 5⁄8
0.43
3.18 X 19.05
1⁄8 X ¾
0.51
3.18 X 25.4
1⁄8 X 1
0.68
3.18 X 31.75
1⁄8 X 1-¼
0.85
3.18 X 38.1
1⁄8 X 1-1⁄2
1.02
3.18 X 50.8
1⁄8 X 2
1.37
3.18 X 76.2
1⁄8 X 3
2.05
3.18 X 101.6
1⁄8 X 4
2.73
4.76 X 12.7
3⁄16 X 1⁄2
0.51
4.76 X 25.4
3⁄16 X 1
1.02
4.76 X 31.75
3⁄16 X 1-¼
1.28
4.76 X 50.8
3⁄16 X 2
2.05
4.76 X 76.2
3⁄16 X 3
3.08
6.35 X 12.7
¼ X 1⁄2
0.68
6.35 X 19.05
¼ X ¾
1.02
6.35 X 25.4
¼ X 1
1.36
6.35 X 31.75
¼ X 1-¼
1.70
6.35 X 38.1
¼ X 1-1⁄2
2.04
6.35 X 50.8
¼ X 2
2.73
6.35 X 63.5
¼ X 2-1⁄2
3.40
6.35 X 76.2
¼ X 3
4.09
6.35 X 101.6
¼ X 4
5.45
6.35 X 152.4
¼ X 6
8.18
9.53 X 19.05
3⁄8 X ¾
1.54
9.53 X 25.4
3⁄8 X 1
2.05
9.53 X 31.75
3⁄8 X 1-¼
2.56
9.53 X 38.1
3⁄8 X 1-1⁄2
3.07
9.53 X 50.8
3⁄8 X 2
4.10
9.53 X 76.2
3⁄8 X 3
6.15
9.53 X 152.4
3⁄8 X 6
12.30
12.7 X 25.4
1⁄2 X 1
2.73
12.7 X 38.1
1⁄2 X 1-1⁄2
4.10
12.7 X 50.8
1⁄2 X 2
5.46
12.7 X 76.2
1⁄2 X 3
8.19
12.7 X 101.6
1⁄2 X 4
10.92
12.7 X 152.4
1⁄2 X 6
16.38
15.88 X 31.75
5⁄8 X 1-¼
4.27
15.88 X 50.8
5⁄8 X 2
6.83
19.05 X 38.1
¾ X 1-1⁄2
6.15
19.05 X 76.2
¾ X 3
12.30
25.4 X 31.75
1 X 1-¼
6.83
25.4 X 76.2
1 X 3
16.38
25.4 X 101.6
1 X 4
21.84
T x W (mm)
T x W (inch)
Kg/MTR
6.35 X 6.35
¼ X ¼
0.34
9.53 X 9.53
3⁄8 X 3⁄8
0.77
12.7 X 12.7
1⁄2 X 1⁄2
1.37
15.88 X 15.88
5⁄8 X 5⁄8
2.13
19.05 X 19.05
¾ X ¾
3.07
25.4 X 25.4
1 X 1
5.46
31.75 X 31.75
1-¼ X 1-¼
8.54
38.1 X 38.1
1-1⁄2 X 1-1⁄2
12.34
50.8 X 50.8
2 X 2
21.86
A/F (mm)
A/F (inch)
Kg/MTR
9.53
3⁄8
0.67
11.11
7⁄16
0.91
12.70
1⁄2
1.18
14.29
9⁄16
1.5
15.88
5⁄8
1.85
17.46
11⁄16
2.24
19.05
¾
2.66
22.23
7⁄8
3.62
23.81
15⁄16
4.16
25.40
1
4.73
26.99
1-1⁄16
5.34
28.58
1-1⁄8
5.99
31.75
1-¼
7.42
34.93
1-3⁄8
8.95
38.10
1-1⁄2
10.65
44.45
1-¾
14.52
50.80
2
18.93
T x W x H (mm)
T x W x H (inch)
Kg/MTR
1.59 X 12.7 X 12.7
1⁄16 X 1⁄2 X 1⁄2
0.32
3.18 X 19.05 X 19.05
1⁄8 X ¾ X ¾
0.94
3.18 X 25.4 X 25.4
1⁄8 X 1 X 1
1.28
3.18 X 31.75 X 31.75
1⁄8 X 1-¼ X 1-¼
1.63
3.18 X 38.1 X 38.1
1⁄8 X 1-1⁄2 X 1-1⁄2
1.97
3.18 X 50.8 X 50.8
1⁄8 X 2 X 2
2.65
6.35 X 50.8 X 50.8
¼ X 2 X 2
5.12
OD x ID (mm)
OD x ID (inch)
Kg/MTR

Chemical Composition

Element Symbol Range % Nominal %
Copper Cu 56.0-60.0 58
Lead Pb 2.5-4.5 3.5
Zinc Zn Balance Balance

Mechanical Properties

Material Metric Values Imperial Values
Tensile Strength Min 400 N/mm² 58000 psi
Yield Strength Min 200 N/mm² 29000 psi
Elongation Min 20% 20%
Hardness Min 135 BHN 135 BHN

Dimensional Tolerances

Round Bar

Size Range Tolerance (mm) Tolerance (inch)
up to 15/16″ 0.08 0.003
1″ to 1-3/8″ 0.1 0.004
1-1/2″ to 1-3/4″ 0.13 0.005
2″2 – 3/4″ 0.15 0.006
3″ + 0.3 0.012

Hex Bar

Size Range Tolerance (mm) Tolerance (inch)
up to 15/16″ 0.08 0.003
1″ to 1-3/8″ 0.1 0.004
1-1/2″ to 1-3/4″ 0.13 0.005
2″2 – 3/4″ 0.15 0.006
3″ + 0.3 0.012

Comparative Specifications

BS2874 – CZ121-4Pb

EN 12449 – CuZn39Pb3 (CW614N)

Resources

Data Sheet

Alloy 385 Data Sheet

PDF (92 KB)

https://www.kormax.com/wp-content/uploads/2022/11/Alloy-385-Free-Machining-Brass-Material-Data-Sheet-Updated.pdf

Resource

Engineering Metal Bar Manufacturing Methods

PDF (298 KB)

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