Material Comparison Engine

Compare verified materials with source-specific conditions, units, and property limits.

Material A (Baseline)

Heat Treatment / Temper Context:

Material B (Comparison)

Heat Treatment / Temper Context:

1. Identity, Classification & Standards

Parameter	C27000 Yellow Brass 65%	C26800 Yellow Brass 66%
Material Family	Copper Alloys	Copper Alloys
Subfamily	Yellow Brass	Yellow Brass
UNS Designation	C27000	C26800
COMMERCIAL Designation	Yellow Brass 65%	Yellow Brass 66%
CDA Designation	Alloy 270	Alloy 268
SPECIFICATION Designation	ASTM F468	SAE J461

2. Chemical Composition Limits (wt %)Source-specific limits and typical values

Element	C27000 Yellow Brass 65%	C26800 Yellow Brass 66%
Cu (Copper)	63 – 68.5%	64 – 68.5%
Pb (Lead)	≤ 0.09%	≤ 0.09%
Zn (Zinc)	Bal.	Bal.
Fe (Iron)	≤ 0.07%	≤ 0.05%

3. Physical Properties

Property	C27000 Yellow Brass 65%	C26800 Yellow Brass 66%
Density · TYPICAL · 20 °CUnit: g/cm³	8.47 g/cm³	8.47 g/cm³

4. Contextual Mechanical PropertiesUnit: SI

Mechanical Parameter	C27000 Yellow Brass 65%1/2 Hard (H02)	C26800 Yellow Brass 66%1/2 Hard (H02)
Modulus of Elasticity (Tension) · TYPICALUnit: GPa	103.4 GPa	103.4 GPa
Modulus of Rigidity · TYPICALUnit: MPa	38610.6 MPa	38610.6 MPa
Machinability Rating · TYPICALUnit: %	30 %	30 %
Tensile Strength · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICAL · 20 °CUnit: MPa	420.6 MPa	420.6 MPa
Tensile Strength · Wire · 0.08 · 1/2 Hard (H02) · TYPICAL · 20 °CUnit: MPa	606.7 MPa	606.7 MPa
Yield Strength (0.5% Ext) · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICAL · 20 °CUnit: MPa	344.7 MPa	344.7 MPa
Elongation · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICAL · 20 °CUnit: %	23 %	23 %
Elongation · Wire · 0.08 · 1/2 Hard (H02) · TYPICAL · 20 °CUnit: %	15 %	15 %
Shear Strength · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICALUnit: MPa	275.8 MPa	275.8 MPa

5. Electrical & Thermal Conductive Properties

Property	C27000 Yellow Brass 65%	C26800 Yellow Brass 66%
Electrical Conductivity · TYPICAL · 20 °CCategory: ELECTRICAL • Unit: % IACS	27 % IACS	27 % IACS
Liquidus Temperature · TYPICALCategory: THERMAL • Unit: °C	932.2 °C	932.2 °C
Solidus Temperature · TYPICALCategory: THERMAL • Unit: °C	904.4 °C	904.4 °C
Thermal Conductivity · TYPICAL · 20 °CCategory: THERMAL • Unit: W/(m·K)	115.96 W/(m·K)	115.96 W/(m·K)
Coefficient of Thermal Expansion (CTE) · TYPICALCategory: THERMAL • Unit: µm/(m·K)	20.34 µm/(m·K)	20.34 µm/(m·K)
Specific Heat Capacity · TYPICAL · 20 °CCategory: THERMAL • Unit: J/(kg·K)	376.8 J/(kg·K)	376.8 J/(kg·K)
Annealing Temperature Range · RANGECategory: THERMAL • Unit: °C	426.7–704.4 °C	426.7–704.4 °C

6. Hardness Evaluation (Discrete Scales Preserved)No cross-scale mathematical conversion

Hardness Scale	C27000 Yellow Brass 65%	C26800 Yellow Brass 66%
Rockwell B Hardness · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICAL	70 HRB	70 HRB
Rockwell 30T Hardness · Flat Products · 0.04 · 1/2 Hard (H02) · TYPICAL	65 HR30T	65 HR30T

7. Fabrication & Processing Comparison

C27000 Yellow Brass 65% Characteristics:

Machinability: Machinability rating: 30% relative to free-cutting brass (C36000 = 100%).

Weldability: Soldering: Excellent; Brazing: Excellent; Oxyacetylene Welding: Good; Gas Shielded Arc Welding: Fair; Coated Metal Arc Welding: Not Recommended; Spot Weld: Good; Seam Weld: Not Recommended; Butt Weld: Good

Formability / Cold Working: Capacity for Being Cold Worked: Excellent. Capacity for Being Hot Formed: Poor.

Heat Treatment & Annealing: Annealing temperature range: 426.7°C to 704.4°C (800°F - 1300°F).

C26800 Yellow Brass 66% Characteristics:

Machinability: Machinability rating: 30% relative to free-cutting brass (C36000 = 100%).

Formability / Cold Working: Capacity for Being Cold Worked: Excellent. Capacity for Being Hot Formed: Poor.

Heat Treatment & Annealing: Annealing temperature range: 426.7°C to 704.4°C (800°F - 1300°F).

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