Steel EN-GJMW-400-5
EN 0.8035 · JIS FCMW · GB KTB350-04
EN-GJMW-400-5 (0.8035) is a decarburized whiteheart malleable iron with a hard low-carbon skin over a softer, more ductile core, produced by a prolonged oxidizing anneal of white iron castings; equivalents include KTB350-04 and FCMW.
Reference datasheet — EN-GJMW-400-5 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 Annealed condition
EN-GJMW-400-5 tempers and conditions
EN-GJMW-400-5 is supplied in 5 conditions, soft to hard. Annealed 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, 6 mm test bar | Thin walls (< ~7 mm) decarburize almost through-section: lower Rm but higher ductility. | 215 | 385 | 10 | 175 HB | 5 % IACS |
Annealed, 9 mm test bar | Intermediate section; use when wall thickness is roughly 8–11 mm. | 230 | 410 | 8 | 185 HB | 5 % IACS |
AnnealedDefault Annealed (whiteheart decarburizing anneal, 12 mm test bar) | Standard as-supplied condition for EN 1562 castings; reference section 12 mm test bar. | 240 | 430 | 7 | 195 HB | 5 % IACS |
Annealed, 15 mm test bar | Heaviest section normally certified for whiteheart; strength up, ductility down as the un-decarburized core grows. | 250 | 445 | 5 | 205 HB | 5 % IACS |
As-welded deposit | Whiteheart castings up to ~ 8 mm can be welded to steel without post-weld anneal; joint properties fall between the two parents. | 250 | 380 | 4 | 20 HRC | 5 % IACS |
Supply forms, finishes and certifications
Ways EN-GJMW-400-5 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
GALV | Annealed + hot-dip galvanized | Surface finish |
What is EN-GJMW-400-5?
EN-GJMW-400-5 (0.8035) is a decarburized whiteheart malleable iron with a hard low-carbon skin over a softer, more ductile core, produced by a prolonged oxidizing anneal of white iron castings; equivalents include KTB350-04 and FCMW. Engineers use it for thin-walled cast fittings and tool bodies that have to be welded or hot-dip galvanized, with 240 MPa yield, 430 MPa tensile, 7 % elongation and 195 HB. Walls must stay at or below about 15 mm for full properties, the hard skin cuts machinability to a score of 68, and corrosion protection depends entirely on coating. Blackheart EN-GJMB grades are used where higher elongation is needed. EN-GJMW-400-5 has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 98% of steel grades. It melts at 1,130°C (2,066 °F). EN-GJMW-400-5 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 96% of steel grades. Elongation at break is 7% and the elastic modulus is 175 GPa (25.4 Msi).
What is EN-GJMW-400-5 used for?
- thin-walled fittings
- electrical fittings
- hand tool bodies
Advantages
- Conducts heat well — 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades
- Easy to machine — 68/100, better than 95% of steel grades
Limitations
- Low strength — 240 MPa (34.8 ksi), worse than 96% of steel grades
- Low stiffness — 175 GPa (25.4 Msi), worse than 96% of steel grades
- Limited ductility — 7%, worse than 96% of steel grades
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 90% of steel grades
- Low electrical conductivity — 5 % IACS, worse than 82% of steel grades
EN-GJMW-400-5 properties
Typical room-temperature values for EN-GJMW-400-5-Annealed; bars are the position among steel grades.
Physical3
EN-GJMW-400-5 has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 98% of steel grades. It melts at 1,130°C (2,066 °F).
Mechanical16
EN-GJMW-400-5 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 96% of steel grades. Elongation at break is 7% and the elastic modulus is 175 GPa (25.4 Msi).
Thermal6
EN-GJMW-400-5 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 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
EN-GJMW-400-5 conducts electricity at 5 % IACS, worse than 82% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (18/100), better than 83% of steel grades.
Sustainability4
Producing a kilogram of EN-GJMW-400-5 takes about 22 MJ of energy and emits 2 kg of CO₂ — less than 99% of steel grades. Typical recycled content is 85%.
Manufacturability7
EN-GJMW-400-5's machinability is good (68/100, better than 95% of steel grades); weldability good (60/100); formability poor (20/100).
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. EN-GJMW-400-5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN-GJMW-400-5
Is EN-GJMW-400-5 easy to machine?
Core machines like a soft ferritic iron, but take the hard decarburized skin off in one deeper pass with coated carbide — light skimming cuts wear tools fast.
Can EN-GJMW-400-5 be welded?
Best weldability of all malleable irons in thin sections: MMA/MIG with low-carbon or Ni-Fe filler, preheat 150–250 °C, small beads; avoid welding through into the high-carbon core.
Can EN-GJMW-400-5 be formed, bent or molded?
Green-sand or shell cast as white iron with tight risering, then 40–80 h decarburizing anneal at 950–1050 °C in oxidizing packing/atmosphere; keep walls ≤ 15 mm for full properties.
EN-GJMW-400-5 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 |
|---|---|---|
| Cas-cast; drops below ~0.3 % in the decarburized skin after anneal | 2.8 – 3.4 | 3.1 |
| Si | 0.4 – 0.8 | 0.6 |
| Mn | 0.25 – 0.6 | 0.4 |
| Shigher S tolerated than in blackheart grades | ≤ 0.35 | 0.2 |
| P | ≤ 0.1 | 0.05 |
| Crkept low to allow full decarburization | ≤ 0.06 | 0.03 |
| FeEN 1562 leaves composition to the foundry; values are typical whiteheart practice | balance |
What surface finishes work on EN-GJMW-400-5?
Hot-dip galvanizing is the standard finish (skin takes zinc well); also zinc-plates, phosphates, paints and brazes readily — no anodizing (ferrous).
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 EN-GJMW-400-5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 0.8035
- GB (China)
- KTB350-04
- JIS
- FCMW
How much does EN-GJMW-400-5 cost?
EN-GJMW-400-5 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.
EN-GJMW-400-5 — frequently asked
What is EN-GJMW-400-5 used for?
EN-GJMW-400-5 is typically used for thin-walled fittings, electrical fittings and hand tool bodies. In short: most weldable malleable iron; thin-wall castings only; standard galvanizing candidate.
What is the yield strength of EN-GJMW-400-5?
EN-GJMW-400-5 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 96% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is EN-GJMW-400-5 easy to machine?
Reasonably — machinability is rated good (68/100, better than 95% of steel grades). Core machines like a soft ferritic iron, but take the hard decarburized skin off in one deeper pass with coated carbide — light skimming cuts wear tools fast.
Can EN-GJMW-400-5 be welded?
Yes — weldability is rated good (60/100). Best weldability of all malleable irons in thin sections: MMA/MIG with low-carbon or Ni-Fe filler, preheat 150–250 °C, small beads; avoid welding through into the high-carbon core.
What surface finishes work on EN-GJMW-400-5?
Hot-dip galvanizing is the standard finish (skin takes zinc well); also zinc-plates, phosphates, paints and brazes readily — no anodizing (ferrous).
Can EN-GJMW-400-5 be formed, bent or molded?
Green-sand or shell cast as white iron with tight risering, then 40–80 h decarburizing anneal at 950–1050 °C in oxidizing packing/atmosphere; keep walls ≤ 15 mm for full properties.
What is the maximum service temperature of EN-GJMW-400-5?
EN-GJMW-400-5 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.
What is the difference between EN-GJMW-400-5 Annealed and EN-GJMW-400-5-d6?
Annealed is the default condition — standard as-supplied condition for EN 1562 castings; reference section 12 mm test bar. d6: thin walls (< ~7 mm) decarburize almost through-section: lower Rm but higher ductility. Yield strength is 240 MPa in Annealed versus 215 MPa in d6.
How much does EN-GJMW-400-5 cost?
EN-GJMW-400-5 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 1562 – Founding: Malleable cast irons — CEN (2019)
- DIN 1692 Temperguss (GTW-40-05, 0.8035) — DIN (1982)
- ASM Handbook Vol.1 – Properties and Selection: Irons, Steels and High-Performance Alloys (Malleable Iron) — ASM International (1990)
- ASM Handbook Vol.15 – Casting — ASM International (2008)
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.