Steel EN-GJMW-400-5-D15
Grade
EN 0.8035 · JIS FCMW · GB KTB350-04
D15 = annealed, 15 mm test bar
Heaviest section normally certified for whiteheart; strength up, ductility down as the un-decarburized core grows.
Values for the D15 condition
Other EN-GJMW-400-5 tempers and conditions
EN-GJMW-400-5 is listed in 5 conditions; see the grade overview at EN-GJMW-400-5.
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 |
D15This page 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 |
What is EN-GJMW-400-5-D15?
EN-GJMW-400-5-D15 is EN-GJMW-400-5 in the D15 grade — heaviest section normally certified for whiteheart; strength up, ductility down as the un-decarburized core grows. EN-GJMW-400-5-D15 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 445 MPa (64.5 ksi) — weaker than 94% of steel grades. Elongation at break is 5% and the elastic modulus is 173 GPa (25.1 Msi). EN-GJMW-400-5-D15 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). Annealed is the default condition FabDigit quotes; D15 is available on request or by drawing note.
Advantages
- Conducts heat well — 53 W/m·K (30.6 BTU/hr·ft·°F), better than 99% of steel grades
- Easy to machine — 64/100, better than 92% of steel grades
Limitations
- Limited ductility — 5%, worse than 98% of steel grades
- Low stiffness — 173 GPa (25.1 Msi), worse than 96% of steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 94% of steel grades
- Low fracture toughness — 40 MPa·√m (36.4 ksi·√in), worse than 92% of steel grades
- Limited formability — 15/100, worse than 87% of steel grades
EN-GJMW-400-5-D15 properties
Typical room-temperature values for EN-GJMW-400-5-D15; 22 are specific to this condition. Other listed values are EN-GJMW-400-5 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
EN-GJMW-400-5-D15 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-D15 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 445 MPa (64.5 ksi) — weaker than 94% of steel grades. Elongation at break is 5% and the elastic modulus is 173 GPa (25.1 Msi).
Thermal6
EN-GJMW-400-5-D15 is rated for continuous service to 350°C (662 °F). It conducts heat at 53 W/m·K (30.6 BTU/hr·ft·°F), better than 99% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
EN-GJMW-400-5-D15 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-D15 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-D15's machinability is good (64/100, better than 92% of steel grades); weldability good (55/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN-GJMW-400-5-D15
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.
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).
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 | — |
EN-GJMW-400-5-D15 — frequently asked
What is EN-GJMW-400-5-D15 used for?
EN-GJMW-400-5-D15 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-D15?
EN-GJMW-400-5-D15 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 445 MPa (64.5 ksi) — weaker than 94% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is EN-GJMW-400-5-D15 easy to machine?
Reasonably — machinability is rated good (64/100, better than 92% 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-D15 be welded?
Yes — weldability is rated good (55/100). 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-D15?
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-D15 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-D15?
EN-GJMW-400-5-D15 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.