Steel E275K2
EN 1.0456
E275K2 is a non-alloy engineering steel of the EN 10025 series (material 1.0456), available in +U, +N, +A, +C and +SR conditions, with the K2 notch condition providing defined impact toughness.
Reference datasheet — E275K2 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 +U condition
E275K2 tempers and conditions
E275K2 is supplied in 5 conditions, soft to hard. +U is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Lowest hardness condition for heavy cold forming, deep expanding or extensive machining before a later normalizing/hardening step. | 260 | 440 | 30 | 130 HB | — |
+UDefault Hot rolled | Standard low-cost stock condition for hot-finished seamless tube and hollow bar where the mill guarantees the K2 impact value without a separate normalizing cycle. | 305 | 500 | 24 | 150 HB | — |
Normalized | Choose when uniform fine-grain structure and reliable -20 °C notch toughness through the full wall are required, e.g. thick hollow bar, hydraulic cylinder tube or welded assemblies. | 310 | 490 | 26 | 145 HB | — |
Stress relieved | Cold-drawn accuracy with residual stresses removed — preferred when the tube or bar will be machined asymmetrically or bent after supply. | 420 | 560 | 15 | 170 HB | — |
Cold drawn | Pick for close tolerance, smooth-bore precision tube or bar where higher yield strength and dimensional accuracy matter more than ductility. | 500 | 620 | 10 | 185 HB | — |
What is E275K2?
E275K2 is a non-alloy engineering steel of the EN 10025 series (material 1.0456), available in +U, +N, +A, +C and +SR conditions, with the K2 notch condition providing defined impact toughness. It is used for machined and welded mechanical components that need 305 MPa yield, 500 MPa tensile, 24 % elongation and about 150 HB (80 HRB), typically supplied as bar, section and plate. Service is limited to 350 °C, machinability is moderate (rating 60) and the steel has no corrosion resistance. For pressure-retaining plate use P285NH or P295GH instead. E275K2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). E275K2 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
What is E275K2 used for?
- machine parts
- structural brackets
- shafts
- general engineering components
Advantages
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Readily welded — 85/100, better than 83% of steel grades
- Forms and bends easily — 65/100, better than 81% of steel grades
Limitations
- Low strength — 305 MPa (44.2 ksi), worse than 84% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
E275K2 properties
Typical room-temperature values for E275K2-+U; bars are the position among steel grades.
Physical3
E275K2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
E275K2 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E275K2 is rated for continuous service to 350°C (662 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
E275K2 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of E275K2 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
E275K2's machinability is good (60/100, better than 83% 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. E275K2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E275K2
Is E275K2 easy to machine?
Machines like a medium-carbon-manganese steel at ~65 % of 1212; use sharp positive-rake carbide, generous feed and coolant to avoid built-up edge in the +U/+A conditions.
Can E275K2 be welded?
Very good weldability (CEV ≈ 0.40 max) by MAG/SMAW/SAW with ER70S-6 class filler; preheat 100–150 °C only for wall >30 mm or restrained joints.
Can E275K2 be formed, bent or molded?
Cold bendable in +N/+A with radii ≥ 2–3 t; hot form 850–1050 °C followed by normalizing to restore the K2 toughness level.
E275K2 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 |
|---|---|---|
| Ccast analysis | ≤ 0.21 | 0.17 |
| Si | ≤ 0.4 | 0.25 |
| Mn | ≤ 1.5 | 1.1 |
| PK2 quality — reduced P | ≤ 0.03 | 0.02 |
| SK2 quality — reduced S | ≤ 0.03 | 0.01 |
| N | ≤ 0.01 | 0.01 |
| Altotal Al, fully killed / fine grain treatment | ≥ 0.02 | 0.03 |
| Fe | balance |
What surface finishes work on E275K2?
No natural corrosion resistance — protect by phosphating plus paint, zinc plating, hot-dip galvanizing or hard chrome for cylinder bores; not anodizable.
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 E275K2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0456
How much does E275K2 cost?
E275K2 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
E275K2 — frequently asked
What is E275K2 used for?
E275K2 is typically used for machine parts, structural brackets, shafts and general engineering components. In short: toughness-rated engineering steel; weldable general-purpose bar; higher strength than plain mild steel.
What is the yield strength of E275K2?
E275K2 has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is E275K2 easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like a medium-carbon-manganese steel at ~65 % of 1212; use sharp positive-rake carbide, generous feed and coolant to avoid built-up edge in the +U/+A conditions.
Can E275K2 be welded?
Yes — weldability is rated excellent (85/100). Very good weldability (CEV ≈ 0.40 max) by MAG/SMAW/SAW with ER70S-6 class filler; preheat 100–150 °C only for wall >30 mm or restrained joints.
What surface finishes work on E275K2?
No natural corrosion resistance — protect by phosphating plus paint, zinc plating, hot-dip galvanizing or hard chrome for cylinder bores; not anodizable.
Can E275K2 be formed, bent or molded?
Cold bendable in +N/+A with radii ≥ 2–3 t; hot form 850–1050 °C followed by normalizing to restore the K2 toughness level.
What is the maximum service temperature of E275K2?
E275K2 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does E275K2 cost?
E275K2 is a budget-cost steel ($), cheaper than about 90% 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 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes — Non-alloy and alloy steel tubes — CEN (2003)
- EN 10294-1 Hollow bars for machining — Non-alloy and alloy steels — CEN (2005)
- 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)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- EN 1011-2 Welding — Recommendations for welding of metallic materials: Arc welding of ferritic steels — CEN (2001)
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.