Stainless Steel 1.4011-QT315
Heat-treated state
EN 1.4011
QT315 = hardened and tempered ~315 °C
Pick for wear surfaces, valve trim and seats needing ~38–42 HRC; ductility, toughness and corrosion resistance are all reduced.
Values for the QT315 condition
Other 1.4011 tempers and conditions
1.4011 is listed in 5 conditions; see the grade overview at 1.4011.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest supply state for heavy machining or straightening before final hardening and tempering. | 415 | 650 | 26 | 185 HB | — |
Hardened and tempered 675–730 °C | Choose when impact toughness, weld repairability and best corrosion behaviour matter more than strength (hydro turbine, seawater-adjacent pump parts). | 480 | 690 | 26 | 200 HB | — |
N+TDefault Normalized and tempered | Standard supply condition for pump and valve castings — balanced strength, ductility and corrosion resistance per ASTM A743 CA15 / EN 10283 +QT1. | 550 | 760 | 22 | 20 HRC | — |
As fabricated | Raw foundry state — hard, brittle and highly stressed; only an intermediate before annealing or hardening + tempering. | 700 | 1,000 | 5 | 42 HRC | — |
QT315This page Hardened and tempered ~315 °C | Pick for wear surfaces, valve trim and seats needing ~38–42 HRC; ductility, toughness and corrosion resistance are all reduced. | 1,000 | 1,250 | 8 | 40 HRC | — |
What is 1.4011-QT315?
1.4011-QT315 is 1.4011 heat treated to QT315 — pick for wear surfaces, valve trim and seats needing ~38–42 HRC; ductility, toughness and corrosion resistance are all reduced. 1.4011-QT315 has a yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 200 GPa (29 Msi). 1.4011-QT315 has a density of 7.61 g/cm³ (0.275 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,480°C (2,696 °F). N+T is the default condition FabDigit quotes; QT315 is available on request or by drawing note.
Advantages
- High strength — 1,000 MPa (145 ksi), better than 98% of stainless steel grades
- High electrical conductivity — 3 % IACS, better than 95% of stainless steel grades
- Low embodied carbon — 3.4 kg CO₂/kg, better than 91% of stainless steel grades
- Conducts heat well — 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades
Limitations
- Limited ductility — 8%, worse than 99% of stainless steel grades
- Needs corrosion protection — 34/100, worse than 98% of stainless steel grades
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 95% of stainless steel grades
- Difficult to weld — 20/100, worse than 95% of stainless steel grades
1.4011-QT315 properties
Typical room-temperature values for 1.4011-QT315; 16 are specific to this condition. Other listed values are 1.4011 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4011-QT315 has a density of 7.61 g/cm³ (0.275 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Mechanical16
1.4011-QT315 has a yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4011-QT315 is rated for continuous service to 280°C (536 °F). It conducts heat at 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4011-QT315 conducts electricity at 3 % IACS, better than 95% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is poor (34/100), worse than 98% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4011-QT315 takes about 42 MJ of energy and emits 3.4 kg of CO₂ — less than 95% of stainless steel grades. Typical recycled content is 75%.
Manufacturability7
1.4011-QT315's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability poor (20/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4011-QT315
Is 1.4011 easy to machine?
Machine in the annealed or high-tempered state with rigid setups, sharp carbide tooling and moderate speeds (~60–100 m/min); the material work-hardens and gets gummy if feeds are too light.
Can 1.4011 be welded?
Weldable with matching 410 or austenitic 309/316 filler but needs 200–300 °C preheat, interpass control and a post-weld temper at 620–700 °C to avoid hard, cracking-prone HAZ martensite.
Can 1.4011 be formed, bent or molded?
Sand or investment cast with generous feeding; avoid abrupt section changes to limit hot tearing and quench cracking, and always homogenise/temper after hardening.
What surface finishes work on 1.4011?
Passivate in nitric or citric acid after machining for best corrosion resistance; takes a good polish, and can be hard chrome plated or nitrided for wear surfaces (no anodizing).
1.4011 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 10283 GX12Cr12 / ASTM A743 CA15 | ≤ 0.15 | 0.12 |
| SiASTM CA15 allows up to 1.50 | ≤ 0.8 | 0.6 |
| MnASTM CA15 allows up to 1.00 | ≤ 0.8 | 0.6 |
| P | ≤ 0.04 | 0.02 |
| SASTM CA15 max 0.040 | ≤ 0.03 | 0.02 |
| CrASTM CA15 11.5–14.0 | 11.5 – 13.5 | 12.5 |
| Ni | ≤ 1 | 0.5 |
| Mooptional/residual | ≤ 0.5 | 0.2 |
| Fe | balance | — |
1.4011-QT315 — frequently asked
What is 1.4011-QT315 used for?
1.4011-QT315 is typically used for pump casings, valve bodies and trim, turbine parts and compressor components. In short: baseline 12% Cr casting; 650 °C service ceiling; lowest corrosion resistance here.
What is the yield strength of 1.4011-QT315?
1.4011-QT315 has a typical yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4011-QT315 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Machine in the annealed or high-tempered state with rigid setups, sharp carbide tooling and moderate speeds (~60–100 m/min); the material work-hardens and gets gummy if feeds are too light.
Can 1.4011-QT315 be welded?
Not readily — weldability is rated poor (20/100). Weldable with matching 410 or austenitic 309/316 filler but needs 200–300 °C preheat, interpass control and a post-weld temper at 620–700 °C to avoid hard, cracking-prone HAZ martensite.
What surface finishes work on 1.4011-QT315?
Passivate in nitric or citric acid after machining for best corrosion resistance; takes a good polish, and can be hard chrome plated or nitrided for wear surfaces (no anodizing).
Can 1.4011-QT315 be formed, bent or molded?
Sand or investment cast with generous feeding; avoid abrupt section changes to limit hot tearing and quench cracking, and always homogenise/temper after hardening.
What is the maximum service temperature of 1.4011-QT315?
1.4011-QT315 is rated for continuous use to about 280°C (536 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4011 N+T and 1.4011-QT315?
N+T is the default condition — standard supply condition for pump and valve castings — balanced strength, ductility and corrosion resistance per ASTM A743 CA15 / EN 10283 +QT1. QT315: pick for wear surfaces, valve trim and seats needing ~38–42 HRC; ductility, toughness and corrosion resistance are all reduced. Yield strength is 550 MPa in N+T versus 1,000 MPa in QT315.
Sources
- EN 10283 — Corrosion resistant steel castings (GX12Cr12, 1.4011) — CEN (2010)
- ASTM A743/A743M — Castings, Iron-Chromium, Corrosion Resistant (CA15) — ASTM International (2021)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Steel Founders' Society of America — Steel Castings Handbook, Supplement 8 (High Alloy Data Sheets) — SFSA (2004)
- GB/T 2100 / GB/T 6967 — (ZG1Cr13 ) — SAC (2017)
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.