Steel 17Mn4
EN 17Mn4
17Mn4 (material number 1.0481, current designation P295GH) is a killed carbon-manganese steel from the DIN 17155 boiler-plate family, normally supplied normalized for pressure-retaining parts at moderate temperature.
Values for the HR condition
17Mn4 tempers and conditions
17Mn4 is supplied in 6 conditions, soft to hard. HR is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
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?
17Mn4 (material number 1.0481, current designation P295GH) is a killed carbon-manganese steel from the DIN 17155 boiler-plate family, normally supplied normalized for pressure-retaining parts at moderate temperature. It is chosen for a yield strength one step above plain carbon steel, good notch toughness and weldability, and usable allowable-stress data up to about 400 °C, typically as plate, pipe and forgings. Corrosion resistance is that of plain carbon steel, so coating or a corrosion allowance is required, and hardenability is low — heavy plate should not rely on quenching and tempering for strength. 17Mn4 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). 17Mn4 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
What is 17Mn4 used for?
- Welded boiler drums and shells
- Pressure vessel shells and heads
- Steam piping and headers
- Heat exchanger shells
- Air receivers
- Tube plates and vessel flanges
- Welded pressure-part supports
Advantages
- Readily welded — 85/100, better than 83% of steel grades
- Forms and bends easily — 65/100, better than 81% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Low strength — 330 MPa (47.9 ksi), worse than 78% of steel grades
17Mn4 properties
Typical room-temperature values for 17Mn4-HR; bars are the position among steel grades.
Physical3
17Mn4 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 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
17Mn4 is rated for continuous service to 400°C (752 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
17Mn4 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 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's machinability is good (58/100, better than 75% of steel grades); weldability excellent (85/100); formability good (65/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 17Mn4 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 17Mn4
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.
Manufacturability
The process limits FabDigit applies to 17Mn4. Every 17Mn4 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better58 / 100 |
|---|---|
| ISO material group | P.2 |
| Cutting speed (rough / finish) | 180 / 210 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better65 / 100 |
|---|---|
| Weldability | Excellent85 / 100 |
| Bendable | Yes |
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 |
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.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 17Mn4 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0481
How much does 17Mn4 cost?
17Mn4 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
17Mn4 — frequently asked
What is 17Mn4 used for?
17Mn4 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?
17Mn4 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 17Mn4 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% 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 be welded?
Yes — weldability is rated excellent (85/100). 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?
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 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?
17Mn4 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.
How much does 17Mn4 cost?
17Mn4 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in 17Mn4?
Yes — 17Mn4 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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.