Steel 17Mn4 Annealed
Temper
EN 17Mn4
Use when deep cold forming, heavy bending or stress-relief-sensitive machining is needed and strength can be sacrificed.
Values for the Annealed condition
Other 17Mn4 tempers and conditions
17Mn4 is listed in 6 conditions; see the grade overview at 17Mn4.
- Annealed
- Normalized
- HR
- CR
- Q&T
- CD
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedThis page full/soft anneal for maximum ductility | Use when deep cold forming, heavy bending or stress-relief-sensitive machining is needed and strength can be sacrificed. | 275 | 460 | 30 | 135 HB | 9 % IACS |
standard delivery condition for pressure-vessel plate | Pick for boiler drums, steam headers and code-stamped pressure parts — best combination of guaranteed ReH, RT/low-temperature toughness and weldability. | 325 | 510 | 24 | 150 HB | — |
HRDefault Hot rolled | Cheapest form for non-code structural or machining stock where certified toughness in the normalized condition is not required. | 330 | 520 | 22 | 155 HB | 9 % IACS |
Cold rolled | Thin sheet/strip with tight thickness tolerance and smooth surface; strength raised, ductility reduced by rolling. | 450 | 580 | 14 | 180 HB | 9 % IACS |
Quenched and tempered | Only for small forgings/thin parts where extra yield strength is wanted; low hardenability of 0.17 C–1.2 Mn limits response in thick sections and it is rarely a code delivery condition. | 450 | 620 | 20 | 15 HRC | 9 % IACS |
Cold drawn | Bar stock for machined fittings and flange blanks — higher yield, better surface and straightness than hot-rolled bar. | 480 | 600 | 12 | 190 HB | 9 % IACS |
What is 17Mn4 Annealed?
17Mn4 Annealed is 17Mn4 in the Annealed temper — use when deep cold forming, heavy bending or stress-relief-sensitive machining is needed and strength can be sacrificed. 17Mn4 Annealed has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 91% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi). 17Mn4 Annealed has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). HR is the default condition FabDigit quotes; Annealed is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Forms and bends easily — 80/100, better than 93% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Conducts heat well — 49 W/m·K (28.3 BTU/hr·ft·°F), better than 83% of steel grades
Limitations
- Low strength — 275 MPa (39.9 ksi), worse than 91% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
17Mn4 Annealed properties
Typical room-temperature values for 17Mn4 Annealed; 22 are specific to this condition. Other listed values are 17Mn4 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
17Mn4 Annealed has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
17Mn4 Annealed has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 91% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
17Mn4 Annealed is rated for continuous service to 400°C (752 °F). It conducts heat at 49 W/m·K (28.3 BTU/hr·ft·°F), better than 83% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
17Mn4 Annealed conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 17Mn4 Annealed takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
17Mn4 Annealed's machinability is good (56/100, better than 71% of steel grades); weldability excellent (88/100); formability very good (80/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 17Mn4 Annealed
Is 17Mn4 easy to machine?
Machines like normalized 1020–1025 steel at ~65 % of AISI 1212; use sharp positive-rake carbide, generous feed and coolant to avoid gummy chips and built-up edge.
Can 17Mn4 be welded?
Readily weldable by SMAW/GMAW/SAW with matching C-Mn consumables; CEV ≈ 0.40 so preheat 100–150 °C above ~30 mm and PWHT 550–620 °C where the pressure code requires it.
Can 17Mn4 be formed, bent or molded?
Good cold bendability in the normalized condition (min bend radius ≈ 2 t); hot form 900–1050 °C and re-normalize afterwards to restore certified properties.
What surface finishes work on 17Mn4?
No anodizing; shot blast then paint, phosphate, hot-dip galvanize or zinc-plate — bare surfaces rust quickly, and boiler internals rely on water chemistry plus corrosion allowance.
17Mn4 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 |
|---|---|---|
| Cladle analysis, EN 10028-2 P295GH | 0.08 – 0.2 | 0.17 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.9 – 1.5 | 1.2 |
| P | ≤ 0.03 | 0.02 |
| S0.010 max for some deliveries | ≤ 0.02 | 0.01 |
| Altotal Al, fully killed / fine grain | ≥ 0.02 | 0.03 |
| Crresidual | ≤ 0.3 | 0.08 |
| Curesidual | ≤ 0.3 | 0.1 |
| Niresidual | ≤ 0.3 | 0.1 |
| Moresidual | ≤ 0.08 | 0.02 |
| Nb | ≤ 0.02 | — |
| Ti | ≤ 0.03 | — |
| V | ≤ 0.02 | — |
| N | ≤ 0.01 | — |
| Fe | balance | — |
17Mn4 Annealed — frequently asked
What is 17Mn4 Annealed used for?
17Mn4 Annealed is typically used for welded boiler drums and shells, pressure vessel shells and heads, steam piping and headers, heat exchanger shells, air receivers and tube plates and vessel flanges. In short: workhorse mild-steel plate.
What is the yield strength of 17Mn4 Annealed?
17Mn4 Annealed has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 91% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 17Mn4 Annealed easy to machine?
Reasonably — machinability is rated good (56/100, better than 71% of steel grades). Machines like normalized 1020–1025 steel at ~65 % of AISI 1212; use sharp positive-rake carbide, generous feed and coolant to avoid gummy chips and built-up edge.
Can 17Mn4 Annealed be welded?
Yes — weldability is rated excellent (88/100). Readily weldable by SMAW/GMAW/SAW with matching C-Mn consumables; CEV ≈ 0.40 so preheat 100–150 °C above ~30 mm and PWHT 550–620 °C where the pressure code requires it.
What surface finishes work on 17Mn4 Annealed?
No anodizing; shot blast then paint, phosphate, hot-dip galvanize or zinc-plate — bare surfaces rust quickly, and boiler internals rely on water chemistry plus corrosion allowance.
Can 17Mn4 Annealed be formed, bent or molded?
Good cold bendability in the normalized condition (min bend radius ≈ 2 t); hot form 900–1050 °C and re-normalize afterwards to restore certified properties.
What is the maximum service temperature of 17Mn4 Annealed?
17Mn4 Annealed is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 17Mn4-HR and 17Mn4-CD?
HR is the default condition — cheapest form for non-code structural or machining stock where certified toughness in the normalized condition is not required. CD: bar stock for machined fittings and flange blanks — higher yield, better surface and straightness than hot-rolled bar. Yield strength is 330 MPa in HR versus 480 MPa in CD.
Can FabDigit make parts in 17Mn4 Annealed?
Yes — 17Mn4 Annealed 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
- DIN 17155 — Plates and strips of steels for pressure purposes (17Mn4) — DIN (1983)
- EN 10028-2 — Flat products of steels for pressure purposes: non-alloy and alloy steels with elevated temperature properties (P295GH, 1.0481) — CEN (2017)
- EN 10027-2 — Designation systems for steels: steel numbers — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- AD 2000-Merkblatt W1 — Flat products of ferritic steels for pressure vessels — Verband der TÜV (2018)
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.