Steel 5CrNiMo Hot Rolled
Finish state
GB 5CrNiMo
Take the untreated as-rolled or as-forged blank for the lowest price and rough cut-off only; hardness is uneven near 320 HB, so anneal before any machining.
Values for the Hot Rolled condition
Other 5CrNiMo tempers and conditions
5CrNiMo is listed in 8 conditions; see the grade overview at 5CrNiMo.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault spheroidize/soft annealed forged block or bar | Order this soft annealed forged block or bar at 220 HB for rough machining the die cavity, then through-harden and temper the finished tool to its working hardness. | 450 | 760 | 18 | 220 HB | — |
850–870 °C air cool (pre-machining grain refinement) | Use 850–870 °C normalizing with air cooling after forging to refine structure and remove banding; it is normally followed by annealing rather than used as a delivered state. | 620 | 1,000 | 12 | 31 HRC | 6.6 % IACS |
Hot RolledThis page untreated bar or block | Take the untreated as-rolled or as-forged blank for the lowest price and rough cut-off only; hardness is uneven near 320 HB, so anneal before any machining. | 680 | 1,050 | 12 | 34 HRC | 6.6 % IACS |
Q&T 30–34 HRC | Use the 560–580 °C temper at 30–34 HRC for blocks over about 400 mm thick and dovetail or holder sections, where 15% elongation and top toughness prevent through-cracking. | 880 | 1,050 | 15 | 32 HRC | — |
Q&T 34–38 HRC | Choose the ~540 °C temper (34–38 HRC) for die blocks about 300–400 mm thick, balancing cavity wear resistance against resistance to gross cracking up to 480 °C. | 1,000 | 1,180 | 13 | 36 HRC | — |
Q&T 38–42 HRC | Pick the 490–520 °C temper at 38–42 HRC for hammer die blocks under about 300 mm thick, the common compromise between cavity wear resistance and toughness. | 1,120 | 1,300 | 11 | 40 HRC | — |
Q&T 44–48 HRC | Temper near 400 °C to 44–48 HRC for small hot-forging die inserts and punches where wear dominates and impact is light; elongation drops to 8% and service caps at 350 °C. | 1,300 | 1,500 | 8 | 46 HRC | — |
As-quenched | Use only as the specified hardenability check after 830–860 °C oil quenching at 55 HRC; temper immediately, since untempered blocks are brittle and crack-prone. | 1,520 | 1,980 | 2 | 55 HRC | 5.7 % IACS |
What is 5CrNiMo Hot Rolled?
5CrNiMo Hot Rolled is 5CrNiMo supplied in the Hot Rolled condition — take the untreated as-rolled or as-forged blank for the lowest price and rough cut-off only; hardness is uneven near 320 HB, so anneal before any machining. 5CrNiMo Hot Rolled has a yield strength of 680 MPa (98.6 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 80% of steel grades. Elongation at break is 12% and the elastic modulus is 210 GPa (30.5 Msi). 5CrNiMo Hot Rolled has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,420°C (2,588 °F). Annealed is the default condition FabDigit quotes; Hot Rolled is available on request or by drawing note.
Advantages
- High strength — 680 MPa (98.6 ksi), better than 80% of steel grades
Limitations
- Limited formability — 12/100, worse than 92% of steel grades
- Low fracture toughness — 50 MPa·√m (45.5 ksi·√in), worse than 86% of steel grades
- Limited ductility — 12%, worse than 84% of steel grades
- Difficult to machine — 35/100, worse than 84% of steel grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades
5CrNiMo Hot Rolled properties
Typical room-temperature values for 5CrNiMo Hot Rolled; 22 are specific to this condition. Other listed values are 5CrNiMo reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
5CrNiMo Hot Rolled has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical12
5CrNiMo Hot Rolled has a yield strength of 680 MPa (98.6 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 80% of steel grades. Elongation at break is 12% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
5CrNiMo Hot Rolled is rated for continuous service to 300°C (572 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical2
5CrNiMo Hot Rolled has an electrical resistivity of 2.6×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 5CrNiMo Hot Rolled takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability6
5CrNiMo Hot Rolled's machinability is fair (35/100, worse than 84% of steel grades); weldability poor (25/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5CrNiMo Hot Rolled
Is 5CrNiMo easy to machine?
Rough the cavity in the annealed condition (≤241 HB) with coated carbide milling — this is the most economical route. After quench and temper to 34–42 HRC, restrict work to finishing passes with rigid clamping and low feed to avoid edge chipping.
Can 5CrNiMo be welded?
Weldability is poor. For cavity repair, preheat to 350–400 °C, use matching or H13-type electrodes, then temper immediately at about 20–30 °C below the original tempering temperature and cool slowly to prevent cracking.
Can 5CrNiMo be formed, bent or molded?
Cold forming is essentially impossible. Forge at 1050–1150 °C with finish forging not below about 850 °C, cool slowly after forging and anneal promptly to avoid flakes and cracks.
What surface finishes work on 5CrNiMo?
Cavities can be polished up to pre-mirror grades. Nitriding or boronizing is common to raise hot wear life, but an over-thick nitrided layer tends to spall under hammer loading; oil parts for storage and shipment to prevent rust.
5CrNiMo 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 |
|---|---|---|
| C | 0.5 – 0.6 | 0.55 |
| Si | 0.1 – 0.4 | 0.25 |
| Mn | 0.5 – 0.8 | 0.65 |
| Cr | 0.5 – 0.8 | 0.65 |
| Ni | 1.4 – 1.8 | 1.6 |
| Mo | 0.15 – 0.3 | 0.22 |
| Pimpurity limit | ≤ 0.03 | — |
| Simpurity limit | ≤ 0.03 | — |
| Fe | balance | — |
5CrNiMo Hot Rolled — frequently asked
What is 5CrNiMo Hot Rolled used for?
5CrNiMo Hot Rolled is typically used for large forging dies, hammer dies and die blocks. In short: toughest hot-work die steel; for large hammer dies; deep-hardening die block grade.
What is the yield strength of 5CrNiMo Hot Rolled?
5CrNiMo Hot Rolled has a typical yield strength of 680 MPa (98.6 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 80% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 5CrNiMo Hot Rolled easy to machine?
Not especially — machinability is rated fair (35/100, worse than 84% of steel grades). Rough the cavity in the annealed condition (≤241 HB) with coated carbide milling — this is the most economical route. After quench and temper to 34–42 HRC, restrict work to finishing passes with rigid clamping and low feed to avoid edge chipping.
Can 5CrNiMo Hot Rolled be welded?
Not readily — weldability is rated poor (25/100). Weldability is poor. For cavity repair, preheat to 350–400 °C, use matching or H13-type electrodes, then temper immediately at about 20–30 °C below the original tempering temperature and cool slowly to prevent cracking.
What surface finishes work on 5CrNiMo Hot Rolled?
Cavities can be polished up to pre-mirror grades. Nitriding or boronizing is common to raise hot wear life, but an over-thick nitrided layer tends to spall under hammer loading; oil parts for storage and shipment to prevent rust.
Can 5CrNiMo Hot Rolled be formed, bent or molded?
Cold forming is essentially impossible. Forge at 1050–1150 °C with finish forging not below about 850 °C, cool slowly after forging and anneal promptly to avoid flakes and cracks.
What is the maximum service temperature of 5CrNiMo Hot Rolled?
5CrNiMo Hot Rolled 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 5CrNiMo Annealed and 5CrNiMo-Q?
Annealed is the default condition — order this soft annealed forged block or bar at 220 HB for rough machining the die cavity, then through-harden and temper the finished tool to its working hardness. Q: use only as the specified hardenability check after 830–860 °C oil quenching at 55 HRC; temper immediately, since untempered blocks are brittle and crack-prone. Yield strength is 450 MPa in Annealed versus 1,520 MPa in Q.
Sources
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating (Tool Steels) — ASM International (1991)
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.