Precious Metal 22K-H01
Supply condition
GB Au916 · ISO 9202
H01 = quarter hard
Slight stiffening for sheet blanks that must hold shape yet still be formed by hand.
Values for the H01 condition
Other 22K tempers and conditions
22K is listed in 6 conditions; see the grade overview at 22K.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefault Annealed | Default mill condition for hand fabrication, bending, chain making and stone setting. | 75 | 220 | 35 | 52 HB | 46 % IACS |
As cast | Condition of lost-wax cast jewelry bodies before finishing; coarse grain gives lower strength and some porosity. | 80 | 200 | 22 | 55 HB | 45 % IACS |
H01This page Quarter hard | Slight stiffening for sheet blanks that must hold shape yet still be formed by hand. | 180 | 275 | 18 | 76 HB | 45 % IACS |
Grain-refined / micro-alloyed 916 hard gold | Choose for lightweight hollow and stamped 916 jewelry where roughly double the annealed hardness is needed without lowering karatage. | 180 | 300 | 15 | 100 HB | 42 % IACS |
Half hard | Standard condition for bangles, tube stock and machined components needing better dent resistance. | 250 | 320 | 8 | 95 HB | 44 % IACS |
Full hard | Maximum strength condition for fine drawn wire, chain links and springy clasps; must be annealed before heavy forming. | 320 | 380 | 4 | 114 HB | 43 % IACS |
What is 22K-H01?
22K-H01 is 22K supplied in the H01 condition — slight stiffening for sheet blanks that must hold shape yet still be formed by hand. 22K-H01 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 59% of precious metal grades. Elongation at break is 18% and the elastic modulus is 78 GPa (11.3 Msi). 22K-H01 has a density of 17.8 g/cm³ (0.643 lb/in³), heavier than 87% of precious metal grades. It melts at 940°C (1,724 °F). ANN is the default condition FabDigit quotes; H01 is available on request or by drawing note.
Advantages
- Easy to machine — 56/100, better than 94% of precious metal grades
- Good corrosion resistance — 97/100, better than 88% of precious metal grades
- Readily welded — 80/100, better than 87% of precious metal grades
Limitations
- Low stiffness — 78 GPa (11.3 Msi), worse than 90% of precious metal grades
- High embodied carbon — 14,000 kg CO₂/kg, worse than 88% of precious metal grades
- Heavy — 17.8 g/cm³ (0.643 lb/in³), worse than 87% of precious metal grades
- Limited ductility — 18%, worse than 83% of precious metal grades
22K-H01 properties
Typical room-temperature values for 22K-H01; 19 are specific to this condition. Other listed values are 22K reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
22K-H01 has a density of 17.8 g/cm³ (0.643 lb/in³), heavier than 87% of precious metal grades. It melts at 940°C (1,724 °F).
Mechanical12
22K-H01 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 59% of precious metal grades. Elongation at break is 18% and the elastic modulus is 78 GPa (11.3 Msi).
Thermal6
22K-H01 is rated for continuous service to 300°C (572 °F). It conducts heat at 203 W/m·K (117.3 BTU/hr·ft·°F), better than 70% of precious metal grades. Thermal expansion is 14.6 µm/m·K (8.11 µin/in·°F).
Electrical3
22K-H01 conducts electricity at 45 % IACS, better than 69% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is excellent (97/100), better than 88% of precious metal grades.
Sustainability4
Producing a kilogram of 22K-H01 takes about 200,000 MJ of energy and emits 14,000 kg of CO₂ — more than 85% of precious metal grades. Typical recycled content is 30%.
Manufacturability8
22K-H01's machinability is good (56/100, better than 94% of precious metal grades); weldability very good (80/100); formability very good (80/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 22K-H01
Is 22K easy to machine?
Gummy and smearing — use razor-sharp carbide or diamond tools, high speed, light feed, and collect all swarf for refining.
Can 22K be welded?
Excellent with laser/PUK welding and oxy-hydrogen torch; use matched 22K karat solders (easy/medium/hard) and borax-type flux, avoid Cd-bearing filler.
Can 22K be formed, bent or molded?
Outstanding cold formability — rolls to foil and draws to fine wire; interstage anneal at 600–700 °C with rapid quench every 50–60% reduction.
What surface finishes work on 22K?
Polishes to a deep-yellow mirror easily but is soft and scratch-prone; depletion gilding/acid bombing brightens cast surfaces, rhodium or hard-gold plating adds wear resistance.
22K 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 |
|---|---|---|
| Au916‰ minimum fineness per ISO 9202 / GB 11887 | 91.6 – 92.5 | 91.7 |
| Agraises ductility, shifts colour greener | 2 – 6 | 5 |
| Zndeoxidiser/fluidity aid in casting alloys | 0 – 1 | 0.4 |
| Ti+Ir+Ru (grain refiner)only in hard/grain-refined 916 variants | 0 – 0.15 | 0.05 |
| Cubalance of alloying addition; deepens the yellow-red colour and hardens | ≥ 1.5 (balance) | — |
22K-H01 — frequently asked
What is 22K-H01 used for?
22K-H01 is typically used for traditional jewelry, bangles, coins and religious ornaments. In short: high gold content, workable; softer than 18K; fine-wire drawing grade.
What is the yield strength of 22K-H01?
22K-H01 has a typical yield strength of 180 MPa (26.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 59% of precious metal grades. Strength varies by condition: see the 6 listed tempers.
Is 22K-H01 easy to machine?
Reasonably — machinability is rated good (56/100, better than 94% of precious metal grades). Gummy and smearing — use razor-sharp carbide or diamond tools, high speed, light feed, and collect all swarf for refining.
Can 22K-H01 be welded?
Yes — weldability is rated very good (80/100). Excellent with laser/PUK welding and oxy-hydrogen torch; use matched 22K karat solders (easy/medium/hard) and borax-type flux, avoid Cd-bearing filler.
What surface finishes work on 22K-H01?
Polishes to a deep-yellow mirror easily but is soft and scratch-prone; depletion gilding/acid bombing brightens cast surfaces, rhodium or hard-gold plating adds wear resistance.
Can 22K-H01 be formed, bent or molded?
Outstanding cold formability — rolls to foil and draws to fine wire; interstage anneal at 600–700 °C with rapid quench every 50–60% reduction.
What is the maximum service temperature of 22K-H01?
22K-H01 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 22K-ANN and 22K-H04?
ANN is the default condition — default mill condition for hand fabrication, bending, chain making and stone setting. H04: maximum strength condition for fine drawn wire, chain links and springy clasps; must be annealed before heavy forming. Yield strength is 75 MPa in ANN versus 320 MPa in H04.
Sources
- ISO 9202 — Jewellery: Fineness of precious metal alloys — ISO (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys (Precious Metals) — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (Noble Metals) — ASM International (2005)
- Karat gold jewelry alloy datasheets (sheet/wire/casting grain) — Precious-metal refiners (2023)
- Gold mining life-cycle inventory summaries — World Gold Council (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.