Stainless Steel 1.4005 QT 30-35 HRC
Hardness band
EN 1.4005 · UNS S41600 · AISI/SAE 416 · GB Y1Cr13
For wear-loaded machined parts (bushings, cams, spindles) needing higher hardness than the QT grades but some residual toughness.
Values for the QT 30-35 HRC condition
Other 1.4005 tempers and conditions
1.4005 is listed in 6 conditions; see the grade overview at 1.4005.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ADefault Annealed | Standard stocked bar condition for high-volume screw-machine parts that do not need heat treatment. | 320 | 550 | 25 | 175 HB | — |
Hardened and high-temperature tempered, Rm 650–850 MPa | Standard EN quenched-and-tempered delivery condition — best compromise of strength, ductility and corrosion behaviour for shafts and valve stems. | 520 | 750 | 15 | 20 HRC | — |
Hardened and tempered, Rm 700–850 MPa | Slightly stronger Q&T grade class for small-section fasteners and pins where 500 MPa proof strength is required. | 560 | 780 | 14 | 23 HRC | — |
Cold drawn / centreless ground bar | Pick when close tolerance, straightness and higher as-supplied strength are needed without heat treatment. | 585 | 760 | 14 | 21 HRC | — |
QT 30-35 HRCThis page oil/air hardened, tempered ~300–400 °C | For wear-loaded machined parts (bushings, cams, spindles) needing higher hardness than the QT grades but some residual toughness. | 860 | 1,030 | 13 | 32 HRC | — |
Hardened | Maximum hardness condition for wear surfaces and lightly loaded cutting/latching parts; brittle and low in impact toughness. | 1,050 | 1,300 | 8 | 40 HRC | — |
What is 1.4005 QT 30-35 HRC?
1.4005 QT 30-35 HRC is 1.4005 heat treated to QT 30-35 HRC — for wear-loaded machined parts (bushings, cams, spindles) needing higher hardness than the QT grades but some residual toughness. 1.4005 QT 30-35 HRC has a yield strength of 860 MPa (125 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 13% and the elastic modulus is 215 GPa (31.2 Msi). 1.4005 QT 30-35 HRC has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F). +A is the default condition FabDigit quotes; QT 30-35 HRC is available on request or by drawing note.
Advantages
- Conducts heat well — 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades
- High strength — 860 MPa (125 ksi), better than 98% of stainless steel grades
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of stainless steel grades
- Easy to machine — 55/100, better than 94% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Hard to polish — 35/100, worse than 100% of stainless steel grades
- Difficult to weld — 15/100, worse than 98% of stainless steel grades
- Needs corrosion protection — 36/100, worse than 96% of stainless steel grades
- Limited ductility — 13%, worse than 93% of stainless steel grades
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
1.4005 QT 30-35 HRC properties
Typical room-temperature values for 1.4005 QT 30-35 HRC; 14 are specific to this condition. Other listed values are 1.4005 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4005 QT 30-35 HRC has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Mechanical15
1.4005 QT 30-35 HRC has a yield strength of 860 MPa (125 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 13% and the elastic modulus is 215 GPa (31.2 Msi).
Thermal6
1.4005 QT 30-35 HRC is rated for continuous service to 300°C (572 °F). It conducts heat at 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4005 QT 30-35 HRC conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (36/100), worse than 96% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4005 QT 30-35 HRC takes about 43 MJ of energy and emits 3 kg of CO₂ — less than 94% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4005 QT 30-35 HRC's machinability is good (55/100, better than 94% of stainless steel grades); weldability poor (15/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4005 QT 30-35 HRC
Is 1.4005 easy to machine?
Benchmark free-machining stainless — run 25–40 % faster than 410 with sharp positive-rake carbide, sulfurised oil or good flood coolant; chips break cleanly and threads/knurls form well.
Can 1.4005 be welded?
Essentially not recommended: sulfur causes hot cracking; if unavoidable, preheat 200–300 °C, use 309L/410NiMo filler, minimum restraint and post-weld temper at 700–760 °C.
Can 1.4005 be formed, bent or molded?
Cold forming limited to light bending in the annealed condition with generous radii (≥2t); hot work 1150–800 °C then slow-cool anneal at 750–800 °C.
What surface finishes work on 1.4005?
Passivate in nitric acid with sodium dichromate (not plain citric) to avoid smut from sulfide inclusions; hard chrome, electroless nickel or black oxide are common; mirror polishing is limited by sulfide stringers.
1.4005 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 |
|---|---|---|
| CEN 10088-3; AISI 416 allows ≤0.15 | 0.06 – 0.15 | 0.11 |
| Si | ≤ 1 | 0.4 |
| MnAISI 416 limit ≤1.25 | ≤ 1.5 | 0.9 |
| PAISI 416 allows ≤0.060 | ≤ 0.04 | 0.03 |
| Sfree-machining addition (MnS) | 0.15 – 0.35 | 0.25 |
| Cr | 12 – 14 | 13 |
| Mooptional | ≤ 0.6 | 0.2 |
| Fe | balance | — |
1.4005 QT 30-35 HRC — frequently asked
What is 1.4005 QT 30-35 HRC used for?
1.4005 QT 30-35 HRC is typically used for fasteners, valve stems, pump shafts and precision turned parts. In short: best-machining martensitic stainless; machinability 85 benchmark; not for welded assemblies.
What is the yield strength of 1.4005 QT 30-35 HRC?
1.4005 QT 30-35 HRC has a typical yield strength of 860 MPa (125 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is 1.4005 QT 30-35 HRC easy to machine?
Reasonably — machinability is rated good (55/100, better than 94% of stainless steel grades). Benchmark free-machining stainless — run 25–40 % faster than 410 with sharp positive-rake carbide, sulfurised oil or good flood coolant; chips break cleanly and threads/knurls form well.
Can 1.4005 QT 30-35 HRC be welded?
Not readily — weldability is rated poor (15/100). Essentially not recommended: sulfur causes hot cracking; if unavoidable, preheat 200–300 °C, use 309L/410NiMo filler, minimum restraint and post-weld temper at 700–760 °C.
What surface finishes work on 1.4005 QT 30-35 HRC?
Passivate in nitric acid with sodium dichromate (not plain citric) to avoid smut from sulfide inclusions; hard chrome, electroless nickel or black oxide are common; mirror polishing is limited by sulfide stringers.
Can 1.4005 QT 30-35 HRC be formed, bent or molded?
Cold forming limited to light bending in the annealed condition with generous radii (≥2t); hot work 1150–800 °C then slow-cool anneal at 750–800 °C.
What is the maximum service temperature of 1.4005 QT 30-35 HRC?
1.4005 QT 30-35 HRC 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 1.4005 +A and 1.4005-H?
+A is the default condition — standard stocked bar condition for high-volume screw-machine parts that do not need heat treatment. H: maximum hardness condition for wear surfaces and lightly loaded cutting/latching parts; brittle and low in impact toughness. Yield strength is 320 MPa in +A versus 1,050 MPa in H.
Sources
- EN 10088-3 Stainless steels — Semi-finished products, bars, rods, sections — CEN (2014)
- EN 10088-1 Stainless steels — List of stainless steels (physical properties) — CEN (2014)
- ASTM A582/A582M Free-Machining Stainless Steel Bars — ASTM (2021)
- GB/T 1220 (Y1Cr13) — SAC (2007)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.16 — Machining — ASM International (1989)
- Type 416 / 1.4005 bar datasheet — Sandvik / Outokumpu (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.