Steel 10CrMo5-5
EN 10CrMo5-5 · ASTM A335 P11
10CrMo5-5 (1.7338, A335 P11) is a low-carbon 1.25Cr-0.5Mo creep-resisting steel used for boiler and superheater tubing at moderate elevated temperatures, stocked as +AR, +A, +N, +NT, +QT and cold-drawn/stress-relieved product.
Reference datasheet — 10CrMo5-5 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +NT condition
10CrMo5-5 tempers and conditions
10CrMo5-5 is supplied in 6 conditions, soft to hard. +NT 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 |
|---|---|---|---|---|---|---|
Annealed | Choose for maximum machinability, cold bending or before re-heat-treatment; lowest strength condition. | 255 | 430 | 32 | 135 HB | 7.9 % IACS |
+NTDefault Normalized and tempered | Standard delivery condition for boiler/superheater tube and pressure pipe; balanced creep strength, toughness and weldability. | 330 | 500 | 26 | 160 HB | — |
Hot rolled | Economical semi-finished bar/plate to be normalized or Q&T by the fabricator; not for pressure service as delivered. | 330 | 520 | 22 | 170 HB | 7.8 % IACS |
Normalized | Normalized only; slightly higher strength and hardness than +NT but less stable microstructure — used for plate and heavier sections where tempering is done later. | 350 | 520 | 24 | 170 HB | 7.8 % IACS |
Quenched and tempered | Used for thick-wall pipe, forgings and headers needing higher room-temperature strength with good toughness. | 410 | 560 | 22 | 12 HRC | — |
Cold drawn and stress relieved | Small-bore precision instrument/heater tube where tight tolerance and higher yield matter more than creep-optimised microstructure. | 460 | 580 | 14 | 11 HRC | 7.6 % IACS |
What is 10CrMo5-5?
10CrMo5-5 (1.7338, A335 P11) is a low-carbon 1.25Cr-0.5Mo creep-resisting steel used for boiler and superheater tubing at moderate elevated temperatures, stocked as +AR, +A, +N, +NT, +QT and cold-drawn/stress-relieved product. In the default condition it provides 330 MPa yield, 500 MPa tensile, 26 % elongation and 160 HB, with a maximum service temperature of 550 °C. Its low carbon gives good weldability (score 62) and cold bendability (formability 60), but it has no corrosion resistance and needs preheat and PWHT for pressure work. 13CrMoSi5-5 is the closest alternative when better scaling resistance is wanted. 10CrMo5-5 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). 10CrMo5-5 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 78% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
What is 10CrMo5-5 used for?
- boiler tubes
- superheater tubes
- pressure piping
Advantages
- High service temperature — 550°C (1,022 °F), better than 95% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
Limitations
- Low strength — 330 MPa (47.9 ksi), worse than 78% of steel grades
10CrMo5-5 properties
Typical room-temperature values for 10CrMo5-5-+NT; bars are the position among steel grades.
Physical3
10CrMo5-5 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
10CrMo5-5 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 78% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
10CrMo5-5 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
10CrMo5-5 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (16/100), better than 79% of steel grades.
Sustainability4
Producing a kilogram of 10CrMo5-5 takes about 30 MJ of energy and emits 2.4 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability7
10CrMo5-5's machinability is good (55/100, better than 62% of steel grades); weldability good (62/100); formability good (60/100).
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. 10CrMo5-5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 10CrMo5-5
Is 10CrMo5-5 easy to machine?
Machines like a normalized 4130-class steel — carbide tooling, moderate speeds, ~60 % of AISI 1212; anneal first for heavy chip removal or threading.
Can 10CrMo5-5 be welded?
Good weldability with matching 1.25Cr-0.5Mo filler (E8018-B2 / ER80S-B2); preheat 150–250 °C and PWHT 700–760 °C to soften the HAZ and avoid hydrogen cracking.
Can 10CrMo5-5 be formed, bent or molded?
Cold-bend tube to moderate radii in +NT or +A condition; hot form at 900–1050 °C followed by re-normalizing and tempering for pressure service.
10CrMo5-5 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 10216-2 / EN 10028-2 | 0.08 – 0.14 | 0.11 |
| SiASTM A335 P11 allows 0.50–1.00 Si | 0.15 – 0.5 | 0.3 |
| Mn | 0.4 – 0.8 | 0.55 |
| P | ≤ 0.03 | |
| S | ≤ 0.01 | |
| Cr | 1 – 1.5 | 1.25 |
| Mo | 0.45 – 0.65 | 0.55 |
| Niresidual max | ≤ 0.3 | |
| Altotal Al, max | ≤ 0.04 | |
| Fe | balance |
What surface finishes work on 10CrMo5-5?
No anodizing; use pickling/phosphating, high-temperature aluminium or silicone paint, or aluminising for fireside oxidation protection.
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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 10CrMo5-5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- A335 P11
- EN / DIN / Werkstoff-Nr.
- 1.733810CrMo5
How much does 10CrMo5-5 cost?
10CrMo5-5 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
10CrMo5-5 — frequently asked
What is 10CrMo5-5 used for?
10CrMo5-5 is typically used for boiler tubes, superheater tubes and pressure piping. In short: low-carbon Cr-Mo tube steel; easy field welding; good cold bendability.
What is the yield strength of 10CrMo5-5?
10CrMo5-5 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 78% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 10CrMo5-5 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines like a normalized 4130-class steel — carbide tooling, moderate speeds, ~60 % of AISI 1212; anneal first for heavy chip removal or threading.
Can 10CrMo5-5 be welded?
Yes — weldability is rated good (62/100). Good weldability with matching 1.25Cr-0.5Mo filler (E8018-B2 / ER80S-B2); preheat 150–250 °C and PWHT 700–760 °C to soften the HAZ and avoid hydrogen cracking.
What surface finishes work on 10CrMo5-5?
No anodizing; use pickling/phosphating, high-temperature aluminium or silicone paint, or aluminising for fireside oxidation protection.
Can 10CrMo5-5 be formed, bent or molded?
Cold-bend tube to moderate radii in +NT or +A condition; hot form at 900–1050 °C followed by re-normalizing and tempering for pressure service.
What is the maximum service temperature of 10CrMo5-5?
10CrMo5-5 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 10CrMo5-5 cost?
10CrMo5-5 is a standard-cost steel ($$), 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.
Sources
- EN 10216-2 Seamless steel tubes for pressure purposes — alloy steel tubes with specified elevated temperature properties — CEN (2020)
- EN 10028-2 Flat products made of steels for pressure purposes — alloy steels with specified elevated temperature properties — CEN (2017)
- ASTM A335/A335M (Grade P11) and ASTM A213/A213M (Grade T11) — ASTM (2022)
- GB 5310 (12Cr1MoVG / 15CrMoG comparable grades) — SAC (2017)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASME BPVC Section II Part D — physical and allowable stress data for 1.25Cr-0.5Mo — ASME (2023)
- Mysteel / SMM — Mysteel (2025)
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.