Introduction
ISO 185/JL/275 is a grey cast iron grade. Typical family applications include machine-tool bases, gearbox cases, bearing housings, pump bodies, compressor bodies and stationary frames.
| Field | Value |
|---|---|
| Designation | ISO 185/JL/275 |
| Material Type | Cast Iron |
| Sub Type | Grey Cast Iron |
| Product Form | casting |
Manufacturing Process
Sand Casting
Shell Molding Casting
Lost Foam Casting
Equivalent Materials
| Standard | Material Grade |
|---|---|
| AS 1830 | 275 |
| ASTM A48M | 275 |
| SAE J431 | G13H19 |
| SAE J431 | G12H21 |
| GB/T 9439 | HT275 |
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| ISO 185 | Grey cast irons — Classification | 2020 | ISO 185/JL/275 | — |
Related Casting Products
Physical Properties
N/A
Chemical Composition
No specified chemical composition limits in ISO 185
Heat Treatment
ISO 185–2020
Heat treatment is subject to agreement. Castings not ordered with heat treatment specified shall not be heat-treated unless agreed by the purchaser before shipment (10.4).. Only if ordered with heat treatment specified or subsequently agreed by purchaser before shipment; no temperature/cycle invented.; If castings are heat-treated, representative samples shall be heat-treated in the same way.
Mechanical Properties
Core Mechanical Properties
Conditions are not identical. Compare each stated condition and applicability separately.
ISO 185 — 2020 · Table 1 — Normative
| Property | Cast-on samples | Separately cast or side-by-side cast samples |
|---|---|---|
| Tensile Strength | ≥ 230 MPa[1] ≥ 210 MPa[2] ≥ 190 MPa[3] ≥ 180 MPa[4] | 275–375 MPa[5] 275–375 MPa[1] 275–375 MPa[2] 275–375 MPa[3] 275–375 MPa[4] |
- Cast-on samples: Cast-on sample, type and representative wall thickness agreed with purchaser; Mandatory Table 1 cast-on sample minimum; sample type, size, position and relevant wall thickness agreed. Source shared boundaries retained; no exclusive boundary inferred.
- Separately cast or side-by-side cast samples: Separately cast or side-by-side cast sample; grade relates to 30 mm as-cast sample; Table 1 lower/upper headings are >= and <=, retained verbatim. Shared exact boundaries are not reassigned. Sand moulds or moulds with comparable thermal behaviour; other methods require agreement.
ISO 185 — 2020 · Table A.1 — Informative
| Property | Informative 30 mm sample data |
|---|---|
| Tensile Strength | 275–375 MPa[6] |
| Compressive Strength | 900 MPa[7] |
| Shear Strength | 320 MPa[7] |
- Separately cast test piece with 30 mm as-cast diameter; Informative reference value; not an acceptance requirement
ISO 185 — 2020 · Table C.1 — Informative
| Property | Informative casting tensile guidance |
|---|---|
| Tensile Strength | ≥ 250 MPa[5] ≥ 215 MPa[1] ≥ 190 MPa[2] ≥ 180 MPa[3] ≥ 170 MPa[4] |
- Casting; anticipated value, not a guaranteed test-piece acceptance limit; Informative Annex C; sample-cut location and any acceptance requirement must be separately agreed.; Informative reference value; not an acceptance requirement
Additional Mechanical Properties
Other Mechanical Properties
ISO 185 — 2020 · Table A.1 — Informative
| Property | Informative 30 mm sample data |
|---|---|
| Torsional Strength | 320 MPa[7] |
- Separately cast test piece with 30 mm as-cast diameter; Informative reference value; not an acceptance requirement
Notes
ISO 185 · Edition 2020
[1] Tensile Strength: wall thickness ≤ 40 mm
[2] Tensile Strength: wall thickness ≤ 80 mm
[3] Tensile Strength: wall thickness ≤ 150 mm
[4] Tensile Strength: wall thickness ≤ 300 mm
[5] Tensile Strength: wall thickness ≤ 20 mm
[6] Tensile Strength: Informative reference range, separately preserved from normative
[7] Compressive Strength/Shear Strength/Torsional Strength: Informative; reference values only, not acceptance limits. Proof strength is 0.1 percent, not Rp0.2.
Welding Conditions
N/A
Applications
For grey cast iron ISO 185 JL/275, typical cast components in this material family include machine-tool bases, gearbox cases, bearing housings, pump bodies, compressor bodies and stationary frames. Typical settings include industrial and agricultural machinery, equipment manufacture and maintenance replacement. Component duty and casting section govern the choice of grade.
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Email Us for a QuoteLast Updated: November 6, 2026