85
3 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 85 →85 · GB/T 699-2015
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Subcategory
- Quality carbon structural steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 699-2015
- Table / clause
- Table 1 and notes a and b; clauses 6.1.2 and 6.1.3
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.82 ～ 0.9 |
| Si | 0.17 ～ 0.37 |
| Mn | 0.5 ～ 0.8 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Cr | ≤ 0.25 (lower limit not stated) |
| Ni | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
Applicability and limitations
Table 1 of GB/T699-2015 gives heat-analysis mass fractions wt%; Product-analysis tolerances are listed separately under GB/T222. ; Table 1, note a: Cu≤0.20% for steel intended for hot pressure working; other tabulated cases are ≤0.25%. ; 6.1.2: N≤0.008% applies to basic oxygen steelmaking; analysis may be omitted if the supplier guarantees compliance; Applicability depends on the steelmaking method. ; 6.1.3: for lead-bath-patented wire, Mn0.30–0.60% for 35–85 and Mn0.70–1.00% for 65Mn/70Mn, Cr≤0.10/Ni≤0.15/Cu≤0.20%; P/S follows the corresponding wire standard and must not exceed Table 1. This is a conditional exception, not a general range. ; Elements not specified in the table must not be intentionally added without purchaser consent.
Verification notes
Table 1 and applicable clauses verified85 · GB/T 1222-2016
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
- GB/T 1222-2016
- Table / clause
- Table 1 · continued table · Notes a/b; 6.1.1–6.1.3
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.82 ～ 0.9 |
| Si | 0.17 ～ 0.37 |
| Mn | 0.5 ～ 0.8 |
| Cr | ≤ 0.25 (lower limit not stated) |
| Ni | ≤ 0.35 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
Applicability and limitations
Heat analysis, mass fractions wt%; Product-analysis tolerances are assessed separately under GB/T222 and are not included in this table. ; Table 1, note b: when required by the purchaser and stated in the contract, residual Cu may be ≤0.20%; Default tabulated limit ≤0.25%. ; 6.1.2: oxygen in 40SiMnVBE is ≤0.0015%; oxygen in other alloy spring steels is ≤0.0025%; This limit is not extended to carbon spring steels. ; Unspecified elements do not mean zero; Spring-steel composition does not establish suitability for every cold-headed component; the specific process requires a separate assessment.
Verification notes
Table 1 and its footnotes, and the oxygen-content requirement in 6.1.2, were checked.85 · GB/T 699-1999
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Material form
- Quality carbon structural steel (source classification)
- Original record status
- Original standard verified
- Standard edition
- GB/T 699-1999
- Table / clause
- Main-text Table 1, row 20, Table 2 and Clause 6.1.1
- PDF page references
- 5、6
- Unit
- Mass fraction (%)
- Analysis type
- Ladle analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.82 ～ 0.9 |
| Si | 0.17 ～ 0.37 |
| Mn | 0.5 ～ 0.8 |
| Cr | ≤ 0.25 (lower limit not stated) |
| Ni | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
Applicability and limitations
Edition 1999, main-text Table 1, row 20, unified numerical designation U20852. This record uses the default quality-steel class; heat analysis, mass fraction %. Table 2: for quality steel, P and S are each ≤0.035%; for higher-quality class A, each is ≤0.030%; for special-quality class E, the requirements are P≤0.025% and S≤0.020%. Do not apply A/E limits to the default class. 6.1.1.2—3: scrap-based steelmaking may permit Cu≤0.30%; steel for hot pressure working requires Cu≤0.20%. This record retains the default Cu≤0.25% in Table 1; specific conditions require separate confirmation. 6.1.1.4: Mn/Cr/Ni/Cu for lead-patented steel wire 35—85 has a separate restriction and does not apply to this default structural-steel record. Mechanical properties in Table 3 and 6.4 depend on specimens, dimensions, heat treatment and order requirements. Existing reference properties are not upgraded to universal guarantees by this composition review.