SM570
1 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.
Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.
Open condition selection, comparison and carbon-equivalent tools for SM570 →SM570 · JIS G 3106-2020
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Subcategory
- Carbon steel
- Material form
- Hot-rolled structural steel (plate, sheet, strip, sections and flat bars; forms and thicknesses subject to conditions)
- Original record status
- Original standard verified
- Standard edition
- JIS G 3106:2020
- Table / clause
- Clause 4/Table 1; Clause 5/Table 2 notes a-c; Annex JA/Table JA.1 notes a-c
- PDF page references
- 9、10、19
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Table 2: ordinary applicable products, thickness ≤100 mm; See the scope note for Table 1 for flat-bar limits
Table JA.1: only plate agreed between purchaser and supplier, 100 mm < thickness ≤ 150 mm; the upper limit for Mn must be agreed in the contract.
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | ≤ 0.18 (lower limit not stated) |
| Mn | ≤ 1.7 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Si | ≤ 0.55 (lower limit not stated) |
Applicability and limitations
Actually based on JIS G3106:2020 Clause 5 Table 2 and Normative Annex JA Table JA.1; composition is heat analysis mass fraction wt%; The original text of the 2024 edition has not yet been verified; compliance of the new edition shall not be confirmed based on this. Applicable to hot-rolled steel for welded structures; Check the thickness of plates, strips, sections and flat bars separately against Table 1; hot-extruded sections are also subject to Annex JC. This does not constitute a supply guarantee for cold-heading wire.. Please select the thickness and whether it belongs to thick steel plates agreed upon by both the supplier and the purchaser; Ordinary thickness Table 2 and agreed thick plate Table JA.1 shall not be used interchangeably. Dashes and unlisted elements in the table do not mean zero content; additions may be made where necessary.; Do not calculate the complete carbon equivalent based on missing items. For SM400A, evaluate Mn against Mn≥2.5×C using measured C from the same heat; do not use the C upper limit to invent a fixed Mn lower limit.. The upper limit of Mn for agreed thick plates in Annex JA must be stipulated by both the supplier and the purchaser; For SM400B, only Mn≥0.60% is additionally provided; the 1.50% upper limit for ordinary thickness shall not be used. Ceq in this standard uses the JIS-specific formula; The IIW/CEV, Pcm, and CET tools on the website are for engineering estimation within the noted applicable range only, and do not replace the heat treatment, thickness, and agreement requirements of this standard. The JSA corrigendum dated 2021-5 changed explanatory text; it did not change the chemical limits in Table 2 or Table JA.1 reviewed in this batch.. Ordinary flat steel ≤ 40 mm; Heat treatment and JIS-specific Ceq/Pcm requirements shall be verified separately.
Original condition-branch records
Table 2: ordinary applicable products, thickness ≤100 mm; See the scope note for Table 1 for flat-bar limits
| Element | Composition requirement |
|---|---|
| C | ≤ 0.18 (lower limit not stated) |
| Mn | ≤ 1.7 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Si | ≤ 0.55 (lower limit not stated) |
- Combined limits
Table JA.1: only plate agreed between purchaser and supplier, 100 mm < thickness ≤ 150 mm; the upper limit for Mn must be agreed in the contract.
| Element | Composition requirement |
|---|---|
| C | ≤ 0.18 (lower limit not stated) |
| Mn | Not listed; must not be treated as 0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Si | ≤ 0.55 (lower limit not stated) |
- Combined limits
- Conditional requirements in the source
- Footnote
- JA.1-b
- Source conditions
- Plate supplied only by purchaser-supplier agreement; The Mn maximum requires separate purchaser-supplier agreement; that contractual maximum is currently unavailable, so reverse matching or calculation cannot establish complete conformity with the agreed composition.
- Automatic evaluation implemented
- No