Stainless Steel 1.4419 +QT 45HRC
Hardness band
EN 1.4419
Compromise between wear resistance and toughness for mould inserts and shear/knife components.
Values for the +QT 45HRC condition
Other 1.4419 tempers and conditions
1.4419 is listed in 5 conditions; see the grade overview at 1.4419.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ADefault Annealed | Stock condition for bar/plate — machine, form and drill in this state, then harden and temper. | 480 | 800 | 16 | 225 HB | — |
Cold drawn | Bright cold-drawn or ground bar for close tolerance blanks that will still be hardened after machining. | 650 | 900 | 10 | 26 HRC | 2.9 % IACS |
Quenched and tempered | Ductile through-hardened condition for shafts, valve parts and fasteners where toughness matters more than wear. | 850 | 1,050 | 12 | 33 HRC | — |
+QT 45HRCThis page hardened, tempered ~400–450 °C | Compromise between wear resistance and toughness for mould inserts and shear/knife components. | 1,250 | 1,450 | 6 | 45 HRC | — |
hardened ~1030–1060 °C, tempered ~180–250 °C | Maximum hardness / wear and edge-retention condition for blades, bearings and wear parts; lowest toughness. | 1,650 | 1,900 | 2 | 54 HRC | — |
What is 1.4419 +QT 45HRC?
1.4419 +QT 45HRC is 1.4419 heat treated to +QT 45HRC — compromise between wear resistance and toughness for mould inserts and shear/knife components. 1.4419 +QT 45HRC has a yield strength of 1,250 MPa (181 ksi) and a tensile strength of 1,450 MPa (210 ksi) — stronger than 99% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 215 GPa (31.2 Msi). 1.4419 +QT 45HRC has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F). +A is the default condition FabDigit quotes; +QT 45HRC is available on request or by drawing note.
Advantages
- High strength — 1,250 MPa (181 ksi), better than 99% of stainless steel grades
- Polishes to a fine finish — 85/100, better than 97% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Conducts heat well — 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades
Limitations
- Difficult to machine — 15/100, worse than 100% of stainless steel grades
- Limited formability — 3/100, worse than 100% of stainless steel grades
- Limited ductility — 6%, worse than 99% of stainless steel grades
- Low fracture toughness — 28 MPa·√m (25.5 ksi·√in), worse than 99% of stainless steel grades
- Difficult to weld — 25/100, worse than 92% of stainless steel grades
1.4419 +QT 45HRC properties
Typical room-temperature values for 1.4419 +QT 45HRC; 13 are specific to this condition. Other listed values are 1.4419 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4419 +QT 45HRC has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4419 +QT 45HRC has a yield strength of 1,250 MPa (181 ksi) and a tensile strength of 1,450 MPa (210 ksi) — stronger than 99% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 215 GPa (31.2 Msi).
Thermal6
1.4419 +QT 45HRC is rated for continuous service to 380°C (716 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4419 +QT 45HRC conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 85% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4419 +QT 45HRC takes about 55 MJ of energy and emits 4.8 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
1.4419 +QT 45HRC's machinability is poor (15/100, worse than 100% of stainless steel grades); weldability poor (25/100); formability not recommended (3/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4419 +QT 45HRC
Is 1.4419 easy to machine?
Machine in the annealed state with sharp, rigid setups, carbide tooling and generous coolant; hardened 45–56 HRC material practically requires grinding, EDM or CBN/ceramic hard-turning.
Can 1.4419 be welded?
Poor weldability — preheat 200–300 °C, low-heat-input TIG with matching or 309-type filler, and temper immediately after welding; avoid welding on hardened parts.
Can 1.4419 be formed, bent or molded?
Cold forming limited to gentle bends in the annealed condition; hot work at 1050–850 °C followed by slow cooling and a full soft anneal (approx. 750–800 °C, furnace cool).
What surface finishes work on 1.4419?
Takes a mirror polish in the hardened condition (mould/cutlery grade); passivate per ASTM A967 or electropolish after grinding — never anodize; hard chrome, nitriding and PVD (TiN/CrN) below the tempering temperature are common.
1.4419 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 |
|---|---|---|
| Chigh carbon for martensitic hardening | 0.36 – 0.42 | 0.39 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.5 |
| P | ≤ 0.04 | — |
| Sfree-machining variants may run higher S | ≤ 0.03 | — |
| Cr | 13 – 14.5 | 13.8 |
| Mohardenability and temper resistance | 0.9 – 1.3 | 1.05 |
| Niresidual/optional in some producer specs | ≤ 1 | — |
| Fe | balance | — |
1.4419 +QT 45HRC — frequently asked
What is 1.4419 +QT 45HRC used for?
1.4419 +QT 45HRC is typically used for cutlery, surgical instruments and corrosion-resistant bearings. In short: hardenable to 54 HRC; mo-alloyed 440B equivalent; cutlery and mould grade.
What is the yield strength of 1.4419 +QT 45HRC?
1.4419 +QT 45HRC has a typical yield strength of 1,250 MPa (181 ksi) and a tensile strength of 1,450 MPa (210 ksi) — stronger than 99% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4419 +QT 45HRC easy to machine?
Not especially — machinability is rated poor (15/100, worse than 100% of stainless steel grades). Machine in the annealed state with sharp, rigid setups, carbide tooling and generous coolant; hardened 45–56 HRC material practically requires grinding, EDM or CBN/ceramic hard-turning.
Can 1.4419 +QT 45HRC be welded?
Not readily — weldability is rated poor (25/100). Poor weldability — preheat 200–300 °C, low-heat-input TIG with matching or 309-type filler, and temper immediately after welding; avoid welding on hardened parts.
What surface finishes work on 1.4419 +QT 45HRC?
Takes a mirror polish in the hardened condition (mould/cutlery grade); passivate per ASTM A967 or electropolish after grinding — never anodize; hard chrome, nitriding and PVD (TiN/CrN) below the tempering temperature are common.
Can 1.4419 +QT 45HRC be formed, bent or molded?
Cold forming limited to gentle bends in the annealed condition; hot work at 1050–850 °C followed by slow cooling and a full soft anneal (approx. 750–800 °C, furnace cool).
What is the maximum service temperature of 1.4419 +QT 45HRC?
1.4419 +QT 45HRC is rated for continuous use to about 380°C (716 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10088-3 Stainless steels — semi-finished products, bars, rods and sections — CEN (2014)
- EN 10088-1 Stainless steels — List of stainless steels (physical properties) — CEN (2014)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Martensitic stainless bar/mould steel datasheets (X38CrMo14 / 440B class) — Böhler / Sandvik / Outokumpu (2022)
- ASTM A276 / A967 (martensitic stainless bar; passivation) — ASTM (2021)
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.