S40940
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 S40940 →S40940 · ASTM A493-2009(2013)
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- ASTM A493-2009(2013)
- Table / clause
- Table 1 · Notes A–B
- PDF page references
- 1、2
Carbon-equivalent reference
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | ≤ 0.06 (lower limit not stated) |
| Mn | ≤ 1 (lower limit not stated) |
| P | ≤ 0.045 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | ≤ 1 (lower limit not stated) |
| Cr | 10.5 ～ 11.7 |
| Ni | ≤ 0.5 (lower limit not stated) |
| Nb | ≤ 0.75 (lower limit not stated) |
Applicability and limitations
Official original A493−09(Reapproved2013) PDF1/2 Table 1 and Notes A–B; Mass fraction wt%. ; The original symbol Cb corresponds to Nb; retain mapping description and do not create separate elements. ; All sum and coupled requirements must be verified using measured composition from the same heat; individual elements being within their ranges does not guarantee compliance with the sum requirements.. ; Si is blank in the table for S44401; if not specified, do not fill in zero; Ti/Nb each ≤ .80 is an envelope derived from non-negative values and a total ≤ .80, and does not represent independent standard limits. ; This standard covers wire/wire rod for cold heading and cold forging; actual supply, dimensions, delivery condition and properties require separate verification..
Combined limits
- Combined-element limits
- Element coefficient
- Nb
- 1
- C
- -10
- Lower limit
- 0
- Requirement
- Nb≥10×C (original Cb)
Original condition-branch records
Default chemical requirements in Table 1; Coupled limits must be checked using measured composition
| Element | Composition requirement |
|---|---|
| C | ≤ 0.06 (lower limit not stated) |
| Mn | ≤ 1 (lower limit not stated) |
| P | ≤ 0.045 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | ≤ 1 (lower limit not stated) |
| Cr | 10.5 ～ 11.7 |
| Ni | ≤ 0.5 (lower limit not stated) |
| Nb | ≤ 0.75 (lower limit not stated) |