Steel GS240
EN 1.0455
GS240 (1.0455) is a general-purpose cast carbon steel of medium strength, historically designated under earlier DIN standards and available as-cast, annealed, normalized, normalized-and-tempered, quenched-and-tempered or stress-relieved.
Reference datasheet — GS240 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 +N condition
GS240 tempers and conditions
GS240 is supplied in 6 conditions, soft to hard. +N 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 when maximum softness, dimensional stability and easiest machining of complex castings is wanted before final treatment. | 235 | 440 | 26 | 130 HB | — |
As fabricated | Cheapest condition for lightly loaded, non-critical parts where residual stress and coarse as-cast structure are acceptable. | 240 | 460 | 18 | 150 HB | — |
Stress relieved | Applied after weld repair or heavy rough machining to stabilize dimensions without changing the normalized properties much. | 255 | 470 | 24 | 145 HB | 10 % IACS |
Normalized and tempered | Pick when residual stresses must be removed and toughness maximized in heavier, welded or machined-all-over castings. | 260 | 470 | 25 | 145 HB | — |
+NDefault Normalized | Standard delivery condition: refines the as-cast grain, gives the specified 240 MPa proof strength with good toughness and weldability. | 265 | 480 | 23 | 150 HB | — |
Quenched and tempered | Use for the highest strength and low-temperature toughness attainable from this low-carbon composition, in thinner or hardenable sections. | 380 | 570 | 20 | 185 HB | — |
What is GS240?
GS240 (1.0455) is a general-purpose cast carbon steel of medium strength, historically designated under earlier DIN standards and available as-cast, annealed, normalized, normalized-and-tempered, quenched-and-tempered or stress-relieved. Default values are 265 MPa yield, 480 MPa tensile, 23 % elongation and about 150 HB (80 HRB), with a weldability score of 85, making it a standard choice for pressure-containing bodies and machinery castings. Maximum service temperature is 400 °C and there is no inherent corrosion resistance, so coatings are mandatory; GE270 offers more strength at similar weldability. GS240 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). GS240 has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
What is GS240 used for?
- Valve bodies
- Pump housings
- General machinery castings
Advantages
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- 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
Limitations
- Low strength — 265 MPa (38.4 ksi), worse than 92% of steel grades
GS240 properties
Typical room-temperature values for GS240-+N; bars are the position among steel grades.
Physical3
GS240 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
GS240 has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
GS240 is rated for continuous service to 400°C (752 °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
GS240 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 GS240 takes about 24 MJ of energy and emits 1.9 kg of CO₂ — less than 97% of steel grades. Typical recycled content is 85%.
Manufacturability8
GS240's machinability is good (62/100, better than 89% of steel grades); weldability excellent (85/100); formability poor (25/100).
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. GS240 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with GS240
Is GS240 easy to machine?
Machines like a normalized 1020–1025 steel at roughly 65 % of AISI 1212; use coated carbide, 120–200 m/min turning, and take a first cut deep enough to get under any casting skin, sand inclusions or chill.
Can GS240 be welded?
Very good weldability (C ≈ 0.20 %, CEV ≈ 0.40) with E7018/ER70S-6 consumables; preheat 100–150 °C for sections over ~30 mm and stress-relieve at 550–620 °C after major weld repair.
Can GS240 be formed, bent or molded?
Green-sand, furan no-bake or shell moulding with generous risering (steel shrinkage ≈ 2 %); pour ~1560–1600 °C, fully deoxidize with Al, and normalize after knock-out to break up the coarse as-cast structure.
GS240 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 |
|---|---|---|
| Cunalloyed cast steel; CEV typically ≤ 0.45 | ≤ 0.23 | 0.2 |
| Si | ≤ 0.6 | 0.4 |
| Mn | 0.5 – 1.2 | 0.9 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.02 |
| Crresidual | ≤ 0.3 | 0.1 |
| Niresidual | ≤ 0.4 | 0.15 |
| Moresidual | ≤ 0.12 | 0.03 |
| Curesidual | ≤ 0.3 | 0.15 |
| Vresidual | ≤ 0.03 | 0.01 |
| Febalance; total residuals typically ≤ 1.0 % | balance |
What surface finishes work on GS240?
Shot-blast to SA 2.5, then phosphate + primer, epoxy or zinc-rich paint; hot-dip galvanizing and zinc/nickel plating are also routine — anodizing does not apply.
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 GS240 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0455
How much does GS240 cost?
GS240 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.
GS240 — frequently asked
What is GS240 used for?
GS240 is typically used for valve bodies, pump housings and general machinery castings. In short: weldable workhorse casting; medium strength, good ductility; low CEV for repair welding.
What is the yield strength of GS240?
GS240 has a typical yield strength of 265 MPa (38.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is GS240 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like a normalized 1020–1025 steel at roughly 65 % of AISI 1212; use coated carbide, 120–200 m/min turning, and take a first cut deep enough to get under any casting skin, sand inclusions or chill.
Can GS240 be welded?
Yes — weldability is rated excellent (85/100). Very good weldability (C ≈ 0.20 %, CEV ≈ 0.40) with E7018/ER70S-6 consumables; preheat 100–150 °C for sections over ~30 mm and stress-relieve at 550–620 °C after major weld repair.
What surface finishes work on GS240?
Shot-blast to SA 2.5, then phosphate + primer, epoxy or zinc-rich paint; hot-dip galvanizing and zinc/nickel plating are also routine — anodizing does not apply.
Can GS240 be formed, bent or molded?
Green-sand, furan no-bake or shell moulding with generous risering (steel shrinkage ≈ 2 %); pour ~1560–1600 °C, fully deoxidize with Al, and normalize after knock-out to break up the coarse as-cast structure.
What is the maximum service temperature of GS240?
GS240 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 GS240 +N and GS240-F?
+N is the default condition — standard delivery condition: refines the as-cast grain, gives the specified 240 MPa proof strength with good toughness and weldability. F: cheapest condition for lightly loaded, non-critical parts where residual stress and coarse as-cast structure are acceptable. Yield strength is 265 MPa in +N versus 240 MPa in F.
How much does GS240 cost?
GS240 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 10293 — Steel castings for general engineering uses — CEN (2015)
- DIN 1681 / DIN 17182 — Cast carbon steels for general purposes — DIN (1985)
- ASTM A216/A216M — Carbon Steel Castings for High-Temperature Service (WCB) — ASTM (2021)
- GB/T 11352 — (ZG230-450, ZG270-500) — SAC (2009)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM (1995)
- Stahlschlüssel / Key to Steel — material no. 1.0455 — Verlag Stahlschlüssel Wegst (2019)
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.