Steel 49MnVS3 +S
Heat-treated state
EN 49MnVS3
+S = treated for cold shearing / softened bar
Softened mill condition so billets can be cold-sheared before hot forging without cracking.
Values for the +S condition
Other 49MnVS3 tempers and conditions
49MnVS3 is listed in 8 conditions; see the grade overview at 49MnVS3.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
soft annealed for maximum machinability | Choose when heavy machining or cold work precedes a later hardening or induction treatment. | 400 | 700 | 20 | 14 HRC | 8.7 % IACS |
+SThis page Treated for cold shearing / softened bar | Softened mill condition so billets can be cold-sheared before hot forging without cracking. | 450 | 750 | 17 | 17 HRC | 8.6 % IACS |
austenitised and air cooled | Use to homogenise a coarse or variable forging structure when uniform mid-range properties matter more than peak strength. | 490 | 820 | 16 | 21 HRC | 8.6 % IACS |
as-rolled bar (untreated, mill condition) | Pick for bar stock to be re-heated and forged, or for lightly loaded machined parts from bar. | 530 | 860 | 14 | 24 HRC | 8.6 % IACS |
As ForgedDefault air cooled from hot-working temperature (precipitation hardened) | Standard commercial condition: forge and control-cool in air, V(C,N) precipitation gives Q&T-level strength with no further heat treatment. | 580 | 900 | 12 | 26 HRC | 8.6 % IACS |
surface hardened journals/bearing surfaces, forged core | Standard finishing route for crankshaft journals and pins: hard wear-resistant case with compressive residual stress over the as-forged core. | 580 | 900 | 10 | 57 HRC | 8.2 % IACS |
Quenched and tempered | Optional route when higher toughness/strength combination than the as-forged condition is required (loses the cost benefit of the non-heat-treated grade). | 760 | 1,000 | 13 | 30 HRC | — |
cold-drawn bright bar from softened stock | Bright, close-tolerance bar for turned parts; higher yield but low ductility and residual stress. | 790 | 930 | 8 | 29 HRC | 8.5 % IACS |
What is 49MnVS3 +S?
49MnVS3 +S is 49MnVS3 heat treated to +S — softened mill condition so billets can be cold-sheared before hot forging without cracking. 49MnVS3 +S has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi). 49MnVS3 +S has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). As Forged is the default condition FabDigit quotes; +S is available on request or by drawing note.
Advantages
- Easy to machine — 66/100, better than 95% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
Limitations
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 78% of steel grades
49MnVS3 +S properties
Typical room-temperature values for 49MnVS3 +S; 23 are specific to this condition. Other listed values are 49MnVS3 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
49MnVS3 +S has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
49MnVS3 +S has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
49MnVS3 +S 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 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
49MnVS3 +S conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of 49MnVS3 +S takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
49MnVS3 +S's machinability is good (66/100, better than 95% of steel grades); weldability poor (30/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 49MnVS3 +S
Is 49MnVS3 easy to machine?
Sulphide inclusions give good chip breaking for a 900 MPa steel; carbide turning at 150–220 m/min in the as-forged state, expect short tool life on induction-hardened surfaces (grind or CBN).
Can 49MnVS3 be welded?
Not intended for welding — high carbon plus 0.06 % S makes it crack- and hot-crack-sensitive; if unavoidable, preheat 250–300 °C, low-hydrogen consumables and post-weld stress relief.
Can 49MnVS3 be formed, bent or molded?
Hot forge 1100–1250 °C with controlled cooling (air/fan) to develop V(C,N) strengthening; avoid cold forming other than light straightening/coining.
What surface finishes work on 49MnVS3?
No inherent corrosion resistance: phosphate + oil, black oxide, paint or Zn/Zn-Ni plating (bake to avoid hydrogen embrittlement); journals are ground and superfinished after induction hardening.
49MnVS3 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 | 0.44 – 0.52 | 0.49 |
| Si | 0.15 – 0.6 | 0.3 |
| Mn | 0.7 – 1 | 0.85 |
| P | ≤ 0.03 | — |
| Sintentional, for machinability | 0.05 – 0.08 | 0.06 |
| VV(C,N) precipitation strengthening | 0.08 – 0.15 | 0.11 |
| Ncontrolled for V(C,N) | 0.01 – 0.02 | 0.02 |
| Crresidual, max | ≤ 0.3 | — |
| Niresidual, max | ≤ 0.3 | — |
| Moresidual, max | ≤ 0.08 | — |
| Fe | balance | — |
49MnVS3 +S — frequently asked
What is 49MnVS3 +S used for?
49MnVS3 +S is typically used for bolts, industrial drive shafts and crankshafts. In short: microalloyed forging bar.
What is the yield strength of 49MnVS3 +S?
49MnVS3 +S has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 49MnVS3 +S easy to machine?
Reasonably — machinability is rated good (66/100, better than 95% of steel grades). Sulphide inclusions give good chip breaking for a 900 MPa steel; carbide turning at 150–220 m/min in the as-forged state, expect short tool life on induction-hardened surfaces (grind or CBN).
Can 49MnVS3 +S be welded?
Not readily — weldability is rated poor (30/100). Not intended for welding — high carbon plus 0.06 % S makes it crack- and hot-crack-sensitive; if unavoidable, preheat 250–300 °C, low-hydrogen consumables and post-weld stress relief.
What surface finishes work on 49MnVS3 +S?
No inherent corrosion resistance: phosphate + oil, black oxide, paint or Zn/Zn-Ni plating (bake to avoid hydrogen embrittlement); journals are ground and superfinished after induction hardening.
Can 49MnVS3 +S be formed, bent or molded?
Hot forge 1100–1250 °C with controlled cooling (air/fan) to develop V(C,N) strengthening; avoid cold forming other than light straightening/coining.
What is the maximum service temperature of 49MnVS3 +S?
49MnVS3 +S 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 49MnVS3 As Forged and 49MnVS3-AR?
As Forged is the default condition — standard commercial condition: forge and control-cool in air, V(C,N) precipitation gives Q&T-level strength with no further heat treatment. AR: pick for bar stock to be re-heated and forged, or for lightly loaded machined parts from bar. Yield strength is 580 MPa in As Forged versus 530 MPa in AR.
Can FabDigit make parts in 49MnVS3 +S?
Yes — 49MnVS3 +S is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10267 — Ferritic-pearlitic steels for precipitation hardening from hot-working temperatures — CEN (1998)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- Microalloyed (non-heat-treated) forging steel bar datasheets — Saarstahl / Georgsmarienhütte / Ovako (2022)
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.