Steel E155
EN E155
E155 (W.-Nr. 1.0033) is a very low-carbon (≤0.10 % C) unalloyed engineering steel with a guaranteed minimum yield strength of 155 MPa, supplied as bar and wire in annealed, normalized, untreated, cold-drawn, light-cold-drawn and stress-relieved conditions.
Reference datasheet — E155 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 +A condition
E155 tempers and conditions
E155 is supplied in 6 conditions, soft to hard. +A 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 |
|---|---|---|---|---|---|---|
+ADefault Annealed | Softest condition — pick for maximum cold forming, deep drawing, bending and cold heading of bar, wire and precision tube. | 180 | 300 | 35 | 95 HB | — |
Normalized | Pick when a uniform fine-grained structure and reproducible strength/toughness are required after hot forming or welding. | 200 | 320 | 32 | 105 HB | — |
Hot rolled | Cheapest stock condition for non-critical bar, tube and sections where only the minimum yield of 155 MPa must be met. | 200 | 340 | 30 | 105 HB | — |
Cold drawn, soft | Precision-drawn dimensions with retained ductility — for tube that still has to be bent, flared or expanded. | 220 | 340 | 28 | 110 HB | — |
Stress relieved | Cold-drawn strength with residual stresses removed — for straight, dimensionally stable tubes and shafts that will be machined. | 280 | 390 | 18 | 125 HB | — |
Cold drawn | Pick for close-tolerance precision tube and bright bar where higher strength, straightness and a smooth bore/surface are needed and no further forming follows. | 340 | 430 | 10 | 135 HB | — |
What is E155?
E155 (W.-Nr. 1.0033) is a very low-carbon (≤0.10 % C) unalloyed engineering steel with a guaranteed minimum yield strength of 155 MPa, supplied as bar and wire in annealed, normalized, untreated, cold-drawn, light-cold-drawn and stress-relieved conditions. Engineers specify it for lightly loaded machined and cold-formed parts because of its outstanding formability (score 95) and weldability (score 95); the default condition gives 180 MPa yield, 300 MPa tensile, 35 % elongation and 95 HB. Strength is low and the soft, gummy structure limits machinability (46), and the steel rusts without coating. E195 is the nearest alternative when more strength is needed. E155 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F). E155 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Elongation at break is 35% and the elastic modulus is 210 GPa (30.5 Msi).
What is E155 used for?
- Cold-formed brackets
- Low-stress pins and shafts
- General fasteners
- Wire products
- Light-duty machine parts
Advantages
- Forms and bends easily — 95/100, better than 99% of steel grades
- Conducts heat well — 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades
- Ductile — tolerates forming and impact — 35%, better than 97% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
- High electrical conductivity — 10.8 % IACS, better than 94% of steel grades
Limitations
- Low strength — 180 MPa (26.1 ksi), worse than 99% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
E155 properties
Typical room-temperature values for E155-+A; bars are the position among steel grades.
Physical3
E155 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical16
E155 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Elongation at break is 35% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E155 is rated for continuous service to 350°C (662 °F). It conducts heat at 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
E155 conducts electricity at 10.8 % IACS, better than 94% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of E155 takes about 24 MJ of energy and emits 1.9 kg of CO₂ — less than 97% of steel grades. Typical recycled content is 30%.
Manufacturability6
E155's machinability is fair (46/100, worse than 59% of steel grades); weldability excellent (95/100); formability excellent (95/100).
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. E155 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E155
Is E155 easy to machine?
Soft and gummy — use sharp positive-rake tools, high speed, generous coolant and chip breakers; cold-drawn (+C/+SR) condition machines noticeably cleaner than annealed.
Can E155 be welded?
Excellent weldability by all arc, resistance and gas processes with CEV ≈ 0.15; no preheat or PWHT needed in normal sections.
Can E155 be formed, bent or molded?
Outstanding cold formability in +A/+LC — deep drawing, cold heading, tube bending and flaring; hot forming 850–1100 °C followed by +N.
E155 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 |
|---|---|---|
| Cvery low carbon — cold heading / deep drawing grade | ≤ 0.1 | 0.07 |
| Sitypical mill practice; often not limited for this grade | ≤ 0.35 | 0.15 |
| Mn | ≤ 0.45 | 0.35 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.02 |
| Fe | balance |
What surface finishes work on E155?
Rusts quickly, so zinc plate, phosphate, black-oxide plus oil, galvanize or paint; case carburizing/nitrocarburizing gives a hard wear surface on the soft core.
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 E155 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0033
- Similar grades
- 15
How much does E155 cost?
E155 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
E155 — frequently asked
What is E155 used for?
E155 is typically used for cold-formed brackets, low-stress pins and shafts, general fasteners, wire products and light-duty machine parts. In short: best-forming carbon steel; weldable without preheat; low strength, low cost.
What is the yield strength of E155?
E155 has a typical yield strength of 180 MPa (26.1 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is E155 easy to machine?
Reasonably — machinability is rated fair (46/100, worse than 59% of steel grades). Soft and gummy — use sharp positive-rake tools, high speed, generous coolant and chip breakers; cold-drawn (+C/+SR) condition machines noticeably cleaner than annealed.
Can E155 be welded?
Yes — weldability is rated excellent (95/100). Excellent weldability by all arc, resistance and gas processes with CEV ≈ 0.15; no preheat or PWHT needed in normal sections.
What surface finishes work on E155?
Rusts quickly, so zinc plate, phosphate, black-oxide plus oil, galvanize or paint; case carburizing/nitrocarburizing gives a hard wear surface on the soft core.
Can E155 be formed, bent or molded?
Outstanding cold formability in +A/+LC — deep drawing, cold heading, tube bending and flaring; hot forming 850–1100 °C followed by +N.
What is the maximum service temperature of E155?
E155 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does E155 cost?
E155 is a budget-cost steel ($), 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 10305-1 Steel tubes for precision applications — seamless cold drawn tubes — CEN (2016)
- EN 10027-2 Designation systems for steels — Numerical system (1.0033) — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Machinery's Handbook (machinability ratings) — Industrial Press (2020)
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.