Steel ZG65Mn
ZG65Mn is a high-manganese, high-carbon cast steel with spring-steel-like properties, used for abrasion and impact-loaded wear parts.
Reference datasheet — ZG65Mn 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 N+T condition
ZG65Mn tempers and conditions
ZG65Mn is supplied in 8 conditions, soft to hard. N+T is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Pick when the casting must be heavily machined or straightened before final hardening. | 350 | 660 | 14 | 195 HB | — |
As fabricated | Cheapest condition for non-critical wear castings where dimensional stability and toughness are secondary. | 400 | 700 | 6 | 225 HB | — |
Stress relieved | Used after welding repair or rough machining to prevent distortion and quench cracking of large castings. | 400 | 720 | 11 | 17 HRC | 8 % IACS |
N+TDefault Normalized and tempered | Standard stocked condition: good balance of strength, hardness and impact toughness for crusher and mining wear castings. | 560 | 880 | 8 | 25 HRC | — |
Normalized | Refines the coarse as-cast dendritic structure and homogenizes properties before tempering or quenching. | 580 | 930 | 7 | 28 HRC | 8 % IACS |
oil quenched and high tempered (820 °C oil + 500–540 °C) | Choose for impact-dominated parts (jaw plates, hammer bodies) needing toughness more than abrasion life. | 830 | 1,030 | 8 | 33 HRC | — |
oil quenched and medium tempered (820 °C oil + 400–450 °C) | Best all-round wear/impact compromise for liners, blow bars, ripper teeth and track shoes. | 1,050 | 1,250 | 5 | 40 HRC | — |
oil/water quenched and low tempered (810–830 °C + 180–250 °C) | Maximum abrasion resistance for thin-section wear plates and screen parts; brittle, avoid heavy impact and sharp notches. | 1,300 | 1,600 | 2 | 50 HRC | — |
What is ZG65Mn?
ZG65Mn is a high-manganese, high-carbon cast steel with spring-steel-like properties, used for abrasion and impact-loaded wear parts. In the default condition it provides 560 MPa yield, 880 MPa tensile, 8 % elongation and 250 HB (25 HRC) with service to 350 °C, and can be quenched and tempered into 30–35 HRC, 38–43 HRC or 48–52 HRC bands to trade toughness for wear life. Elongation is low, machinability is poor (38/100) and weldability is poor because 0.65 % C gives a carbon equivalent above 0.9. For welded or general structural castings, use ZG35CrMo instead. ZG65Mn has a density of 7.81 g/cm³ (0.282 lb/in³), lighter than 84% of steel grades. It melts at 1,420°C (2,588 °F). ZG65Mn has a yield strength of 560 MPa (81.2 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 73% of steel grades. Elongation at break is 8% and the elastic modulus is 205 GPa (29.7 Msi).
What is ZG65Mn used for?
- Crusher liners
- Hammer heads
- Wear plates
- Chute liners
Advantages
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
Limitations
- Limited ductility — 8%, worse than 95% of steel grades
- Limited formability — 10/100, worse than 95% of steel grades
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 90% of steel grades
- Difficult to machine — 38/100, worse than 80% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
ZG65Mn properties
Typical room-temperature values for ZG65Mn-N+T; bars are the position among steel grades.
Physical3
ZG65Mn has a density of 7.81 g/cm³ (0.282 lb/in³), lighter than 84% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
ZG65Mn has a yield strength of 560 MPa (81.2 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 73% of steel grades. Elongation at break is 8% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ZG65Mn is rated for continuous service to 350°C (662 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
ZG65Mn conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of ZG65Mn takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 70%.
Manufacturability8
ZG65Mn's machinability is fair (38/100, worse than 80% of steel grades); weldability poor (25/100); 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 steel family
Yield strength against density for every steel grade FabDigit runs. ZG65Mn is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZG65Mn
Is ZG65Mn easy to machine?
Machine in the annealed or normalized+tempered condition with rigid setups and coated carbide (Vc ≈ 60–110 m/min); above 40 HRC switch to CBN/ceramic or finish by grinding.
Can ZG65Mn be welded?
Poor weldability — 0.65 %C gives CE > 0.9; preheat 300–400 °C, use low-hydrogen or austenitic/Mn-steel electrodes, keep interpass hot and stress-relieve at 600–650 °C immediately after.
Can ZG65Mn be formed, bent or molded?
Sand/resin-shell cast with generous risers and 1.9–2.2 % shrink allowance; slow cooling in mould plus immediate normalizing prevents hot tears and coarse dendrites.
ZG65Mn 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 |
|---|---|---|
| Cgrade-defining carbon level | 0.6 – 0.7 | 0.65 |
| Mn | 0.9 – 1.2 | 1.05 |
| Si | 0.2 – 0.5 | 0.35 |
| Pimpurity limit | ≤ 0.04 | |
| Simpurity limit | ≤ 0.04 | |
| Crresidual | ≤ 0.3 | |
| Niresidual | ≤ 0.3 | |
| Curesidual | ≤ 0.3 | |
| Moresidual | ≤ 0.15 | |
| Fe | balance |
What surface finishes work on ZG65Mn?
Shot-blast the casting, then phosphate + paint, zinc-rich primer or oil for storage; hard-facing overlay or induction hardening can be added on high-wear faces. Not anodizable.
Surface treatments FabDigit runs on steel 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).
Organic Coating
Black / Phosphate
Thermal Spray
How much does ZG65Mn cost?
ZG65Mn is a standard-cost steel ($$), cheaper than about 71% 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.
ZG65Mn — frequently asked
What is ZG65Mn used for?
ZG65Mn is typically used for crusher liners, hammer heads, wear plates and chute liners. In short: wear-resistant spring-steel casting; hardenable to 48–52 HRC; poor weldability.
What is the yield strength of ZG65Mn?
ZG65Mn has a typical yield strength of 560 MPa (81.2 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 73% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is ZG65Mn easy to machine?
Not especially — machinability is rated fair (38/100, worse than 80% of steel grades). Machine in the annealed or normalized+tempered condition with rigid setups and coated carbide (Vc ≈ 60–110 m/min); above 40 HRC switch to CBN/ceramic or finish by grinding.
Can ZG65Mn be welded?
Not readily — weldability is rated poor (25/100). Poor weldability — 0.65 %C gives CE > 0.9; preheat 300–400 °C, use low-hydrogen or austenitic/Mn-steel electrodes, keep interpass hot and stress-relieve at 600–650 °C immediately after.
What surface finishes work on ZG65Mn?
Shot-blast the casting, then phosphate + paint, zinc-rich primer or oil for storage; hard-facing overlay or induction hardening can be added on high-wear faces. Not anodizable.
Can ZG65Mn be formed, bent or molded?
Sand/resin-shell cast with generous risers and 1.9–2.2 % shrink allowance; slow cooling in mould plus immediate normalizing prevents hot tears and coarse dendrites.
What is the maximum service temperature of ZG65Mn?
ZG65Mn is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZG65Mn N+T and ZG65Mn-A?
N+T is the default condition — standard stocked condition: good balance of strength, hardness and impact toughness for crusher and mining wear castings. A: pick when the casting must be heavily machined or straightened before final hardening. Yield strength is 560 MPa in N+T versus 350 MPa in A.
How much does ZG65Mn cost?
ZG65Mn is a standard-cost steel ($$), cheaper than about 71% 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
- GB/T 1222 (65Mn chemistry reference) — SAC (2016)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating — ASM International (1991)
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.