Copper Alloy C93800
UNS C93800 · AISI/SAE 67
C93800 is a high-leaded, high-tin cast bronze (SAE 67, Alloy 3D, ZCuPb20Sn5) sometimes called hard bronze, combining hardness with anti-friction behaviour from its large lead phase.
Reference datasheet — C93800 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the M07 condition
C93800 tempers and conditions
C93800 is supplied in 4 conditions, soft to hard. M07 is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As sand cast | Pick for shaped castings, pump housings and large bearing shells made to ASTM B584. | 110 | 207 | 18 | 55 HB | 11.5 % IACS |
As centrifugally cast | Best for large-diameter sleeves and thick-wall bushings needing sound, segregation-free walls. | 124 | 221 | 12 | 60 HB | 11.5 % IACS |
As pressure die cast | Used for repeat small parts where a chilled, finer structure and better dimensional repeatability are wanted. | 124 | 214 | 12 | 62 HB | 11.5 % IACS |
M07Default As continuous cast | Standard stock form for bushing and bearing bar: dense, fine-grained, best strength of the cast forms. | 131 | 214 | 12 | 60 HB | 11.5 % IACS |
What is C93800?
C93800 is a high-leaded, high-tin cast bronze (SAE 67, Alloy 3D, ZCuPb20Sn5) sometimes called hard bronze, combining hardness with anti-friction behaviour from its large lead phase. It is used for demanding bearing service and gear blanks, produced by sand, centrifugal, permanent-mold and continuous casting, with 214 MPa tensile strength, 131 MPa yield, 12 % elongation and 60 HB. Service temperature is limited to about 230 °C and the alloy cannot be fusion welded or cold formed; C93700 is the nearest alternative when slightly higher strength is wanted. C93800 has a density of 9.3 g/cm³ (0.336 lb/in³), heavier than 99% of copper alloy grades. It melts at 762°C (1,404 °F). C93800 has a yield strength of 131 MPa (19 ksi) and a tensile strength of 214 MPa (31 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 72 GPa (10.4 Msi).
What is C93800 used for?
- heavy-duty bearings
- bushings
- gear blanks
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
Limitations
- Low stiffness — 72 GPa (10.4 Msi), worse than 100% of copper alloy grades
- Difficult to weld — 12/100, worse than 96% of copper alloy grades
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Low strength — 131 MPa (19 ksi), worse than 77% of copper alloy grades
C93800 properties
Typical room-temperature values for C93800-M07; bars are the position among copper alloy grades.
Physical3
C93800 has a density of 9.3 g/cm³ (0.336 lb/in³), heavier than 99% of copper alloy grades. It melts at 762°C (1,404 °F).
Mechanical12
C93800 has a yield strength of 131 MPa (19 ksi) and a tensile strength of 214 MPa (31 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal5
C93800 is rated for continuous service to 230°C (446 °F). It conducts heat at 59 W/m·K (34.1 BTU/hr·ft·°F), worse than 61% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
C93800 conducts electricity at 11.5 % IACS, worse than 65% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C93800 takes about 50 MJ of energy and emits 3.6 kg of CO₂ — less than 89% of copper alloy grades. Typical recycled content is 85%.
Manufacturability7
C93800's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability not recommended (12/100); formability not recommended (10/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C93800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C93800
Is C93800 easy to machine?
Excellent free-machining bronze (≈80% of AISI 1212); use sharp positive-rake tools, light feeds and coolant to avoid lead smear on bearing bores.
Can C93800 be welded?
Not weldable — lead causes hot cracking; joining is by soft soldering or mechanical/press fitting only.
Can C93800 be formed, bent or molded?
Cast only (sand, centrifugal, permanent mold, continuous); wide freezing range needs good gating/feeding, no cold forming.
C93800 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cu | 75 – 79 | 77 |
| Sn | 6.3 – 7.5 | 7 |
| Pb | 13 – 16 | 15 |
| Zn | ≤ 0.8 | |
| Fe | ≤ 0.15 | |
| Sb | ≤ 0.8 | |
| NiNi + Co, max | ≤ 1 | |
| S | ≤ 0.08 | |
| Pmax (1.5 max permitted for continuous cast per B505) | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 |
What surface finishes work on C93800?
Machined finish is normally left as-is; can be soft-soldered or tin/lead plated, but polishing and electroplating adhesion suffer from surface lead.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C93800 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- AISI / SAE
- 67
- Trade names
- Alloy 3D
- Similar grades
- ZCuPb20Sn5
How much does C93800 cost?
C93800 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C93800 — frequently asked
What is C93800 used for?
C93800 is typically used for heavy-duty bearings, bushings and gear blanks. In short: highest-lead heavy-duty bearing bronze; excellent anti-friction under shock; cast only, not weldable.
What is the yield strength of C93800?
C93800 has a typical yield strength of 131 MPa (19 ksi) and a tensile strength of 214 MPa (31 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C93800 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Excellent free-machining bronze (≈80% of AISI 1212); use sharp positive-rake tools, light feeds and coolant to avoid lead smear on bearing bores.
Can C93800 be welded?
Not readily — weldability is rated not recommended (12/100). Not weldable — lead causes hot cracking; joining is by soft soldering or mechanical/press fitting only.
What surface finishes work on C93800?
Machined finish is normally left as-is; can be soft-soldered or tin/lead plated, but polishing and electroplating adhesion suffer from surface lead.
Can C93800 be formed, bent or molded?
Cast only (sand, centrifugal, permanent mold, continuous); wide freezing range needs good gating/feeding, no cold forming.
What is the maximum service temperature of C93800?
C93800 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C93800-M07 and C93800-M01?
M07 is the default condition — standard stock form for bushing and bearing bar: dense, fine-grained, best strength of the cast forms. M01: pick for shaped castings, pump housings and large bearing shells made to ASTM B584. Yield strength is 131 MPa in M07 versus 110 MPa in M01.
How much does C93800 cost?
C93800 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM (2018)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM (2020)
- CDA Alloy Datasheet C93800 (SAE 67, high-leaded tin bronze) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- GB/T 1176 (ZCuPb20Sn5) (2013)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.