Printed from Kezuriba (kezuriba.net/en/materials/fcd450/)
FCD450-10
ISO K (cast iron)Cast iron (spheroidal graphite cast iron = ductile iron; matrix mainly ferrite). Standard: JIS G 5502 (Spheroidal graphite iron castings) (JIS G 5502:2022).
🌐International equivalents
“Close” means composition or properties are not exactly the same. Before substituting, check the values in each standard.
| System | Designation | Number | Relation | Confidence |
|---|---|---|---|---|
| JIS | FCD450-10 | JIS G 5502 (Spheroidal graphite iron castings) | — | |
| ISO | ISO 1083:2018the corresponding international standard of JIS G 5502:2022, MOD | Corresponding international standard (MOD = modified) | One source / reference[1] | |
| ASTM | A536 Grade 65-45-12 | Close (approximate) | One source / reference[9] | |
| EN | EN-GJS-400-18Goldens' table | Close (approximate) | One source / reference[9] | |
| SAE | J434 D4512 | Close (approximate) | One source / reference[9] | |
| GB | — | — | Not confirmed |
Differences between the equivalents (from the sources)
- ISO ISO 1083:2018: A one-to-one correspondence with the ISO designations (JS/450-10, etc.) has not been confirmed in primary sources
- ASTM A536 Grade 65-45-12: In the same row as FCD450 in the Goldens' Foundry cross-reference table. 65-45-12 means tensile strength 65,000 psi (about 448 MPa), yield strength 45,000 psi (about 310 MPa) and elongation 12%. The lower limit of yield strength is higher than for FCD450-10 (280), and the elongation, 12%, also differs
- EN EN-GJS-400-18: Goldens' Foundry's table places EN-GJS-400-18 in the FCD450 / 65-45-12 row (EN-GJS-400-18 also appears in the 60-40-18 / FCD400 row of the same table). Many sources match EN-GJS-450-10, whose numbers fit the designation, but this could not be confirmed in primary sources
- GB : Often given as QT450-10 (GB/T 1348), but not confirmed in primary sources
📄Related specifications (AMS, ASTM etc.)
Specifications called up on purchase orders and drawings. AMS are SAE aerospace material specifications, split by product form (bar, plate, forging), melting practice and heat treatment. Standard texts are paid, so only titles and scopes checked on the publishers’ public pages are shown.
| Spec | Scope | Confidence |
|---|---|---|
| ASTM A536-84(2019)e1 (Grade 65-45-12) | Standard Specification for Ductile Iron CastingsSpheroidal graphite iron castings. 65-45-12 is an as-cast grade. A newer edition (A536-26A) appears on the ASTM page | One source / reference[12] |
All ASTM standards on Kezuriba: ASTM standards quick reference.
⚗Chemical composition (mass %)
As specified in JIS G 5502
| Element | Range | Confidence |
|---|---|---|
| Chemical composition | — | Not confirmed |
⚖Density
—
Not confirmed
The 2022 edition's table of contents has a section "7.8 Physical properties", but its contents could not be confirmed. No primary source giving the density of FCD450 was found
The density could not be confirmed. In the weight calculator, use “Steel, general value” or enter your own.
💪Mechanical properties
“Reference” values are not specified minimums from the standard but figures published by makers and others.
| Condition | Tensile MPa | Yield MPa | Elong. % | Hardness | Type of value |
|---|---|---|---|---|---|
| Separately cast test bar | ≥ 450 | ≥ 280 (0.2% proof stress) | ≥ 10 | HB 140-210 (reference) | JIS specified value (separately cast test bar; hardness is a reference value) Agrees in 2+ sources[3][4][5] |
| Values by wall thickness class in the 2022 edition (/S, /U, /C) | — | — | — | — | JIS specified value Not confirmed |
1 MPa ≈ 145 psi (0.145 ksi). Hardness conversion · unit converter
🔧Machinability notes (as stated in the sources)
- Sandvik Coromant: Nodular cast iron (NCI) is ISO K. It has higher strength than gray cast iron and a tendency to work-harden, so it is harder to machine than gray cast iron. The hardness of NCI is about 155–330 HB[6]
- Sumitomo Electric recommended cutting conditions (turning): for ductile cast iron (FCD450, etc.), continuous to general cutting with AC4010K at vc 180–300–450 m/min (gray cast iron is 200–400–700); interrupted cutting with AC4015K at 160–250–400; heavy interrupted cutting with AC4125K at 120–170–250. High-speed finishing with CBN (BNC500) at vc 150–350–500. AC4015K is the first recommendation for ductile cast iron[8][10]
- Sumitomo Electric evaluation example: interrupted cutting of FCD450 at vc = 450 m/min, f = 0.3 mm/rev, ap = 1.5 mm, wet[10]
- In a shaping test by the Mie Prefecture Industrial Research Institute (2020; feed 2,000 mm/min), the comparison material FCD450 (Si 2.4%, ferrite plus pearlite matrix) showed greater scatter in the maximum cutting force than solid-solution-strengthened cast iron GJS500[11]
📚Sources
Primary sources (public documents from makers, industry associations and standards bodies), numbered where each value is cited. Many are in Japanese.
- webdesk.jsa.or.jp https://webdesk.jsa.or.jp/preview/pre_jis_g_05502_000_000_2022_j_ed10_ch.pdf
- marusank.jp https://marusank.jp/techinfo/column27-2/
- fukuchu.co.jp http://www.fukuchu.co.jp/product-standard.html
- hamakita.co.jp https://www.hamakita.co.jp/advantage/material/fcd450/
- horkos.co.jp https://www.horkos.co.jp/product/cas/tech01.php
- sandvik.coromant.com https://www.sandvik.coromant.com/en-us/knowledge/materials/workpiece-materials
- kyocera.co.jp https://www.kyocera.co.jp/prdct/tool/wp-content/uploads/2014/07/2024-2026_A.pdf#page=8
- sumitool.com https://www.sumitool.com/downloads/cutting-tools/general-catalog/assets/pdf/a.pdf#page=16
- gfmco.com https://gfmco.com/wp-content/uploads/2021/07/Goldens-Guide-3-Ductile-Iron-Grades.pdf
- sumitool.com https://www.sumitool.com/downloads/cutting-tools/general-catalog/assets/pdf/a.pdf#page=17
- pref.mie.lg.jp https://www.pref.mie.lg.jp/common/content/000914942.pdf
- store.astm.org https://store.astm.org/a0536-84r19e01.html
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