30CRNIMO8

Composition is based on Table 3 of EN10083-3:2006 in the official English text of DIN EN10083-3:2007-01, heat analysis wt%. ; Note a: Elements not listed shall not be intentionally added without the purchaser's consent, except for additions needed to finish steelmaking and to enable boron to act on hardenability.; Unspecified values shall not be treated as zero. ; Note b: Small deviations are permitted where hardenability or quenched-and-tempered mechanical-property requirements apply, except for C/P/S; permitted deviations for other elements must not exceed Table 4.; Default heat analysis range shall not be expanded. ; For non-boron steels in this standard, Note c permits steel with improved machinability to be supplied on request: sulfur approximately 0.10%, with the Mn upper limit permitted to increase by an absolute 0.15%.; Approximate values are not default hard upper limits and must be determined by specific inquiry/order; they shall not be automatically mixed with ordinary grades. ; This standard covers alloy steels for quenching and tempering. Suitability for cold heading, wire-rod supply, annealing, surface and dimensions require separate confirmation; do not automatically add products..

EN10269:2013 Table 1, section on steels for quenching and tempering; official BS adoption in English, PDF17 and footnotes PDF19; heat analysis wt%.. ; The Al column is total aluminum; For ≥.020 without a specified upper limit, only the lower limit is retained; no upper limit shall be created. ; Note b sulfur agreement applies only to grades with Note b; 27NiCrMoV15-6 magnetic properties Note c carbon upper limit .28 selected separately. ; Elements not listed shall not be intentionally added without the consent of the purchaser, except additions needed to finish steelmaking; Blank does not represent zero. ; Product analysis deviation, mechanical properties, heat treatment, and cold-heading supply suitability shall be verified separately, and not automatically added to the product center.

Table 2 cast analysis, mass fraction wt%; Si is an upper limit and unspecified elements are not filled with zero. P/S requirements for the C, Ck and Cm series remain separate; S 0.020–0.035% in S-containing grades is a two-sided range. Note 1: unlisted elements may not be intentionally added without purchaser consent, except to complete melting; no fixed residual values are inferred. Table 3 contains permissible product-analysis deviations, not added to cast limits; applicable sizes and positive/negative directions are checked separately. Heat-treatment condition, hardenability and size-dependent properties require separate verification. The standard includes hot-rolled wire rod; chemistry alone is no cold-heading supply commitment. Note 2: small composition deviations, excluding P/S, may be agreed when ordering restricted hardenability bands or quenched-and-tempered/normalized properties, but may not exceed Table 3. These data retain the Table 2 baseline without automatic relaxation. Light-typeface grades in note 4 are for special applications only. Note 5 permits separate ordering of Pb 0.15–0.30% only for the marked C-series grades; not added to ordinary base compositions. Original material number 1.6580; not marked for special application under note 4.

The cover of NF EN 10269:1999 explicitly adopts EN 10269:1999; Preserve the correspondence between the French adoption version and the European version; do not label as other countries or new editions. ; Table 1 gives heat-analysis mass percentages; Single values in P and S columns are upper limits; other single values are parsed according to the inequality signs in the original table; Unspecified elements shall not be filled as zero. ; Applies to billets, bars and wire rod of steels and nickel alloys for fasteners with specified high- or low-temperature properties.; Cold heading and actual supply must be verified in conjunction with delivery condition, dimensions, and process. ; Table 1 Footnote 1: Elements not listed in the table shall not be intentionally added without the buyer's consent (except additions needed to finish steelmaking); Elements that affect properties must be prevented from being introduced via scrap steel, etc.. ; This record only verifies the heat analysis composition in Table 1; product analysis tolerances in Table 2 shall not be automatically added to the heat limits.

Based on the original Table 1 and footnotes of EN10250-3:1999 as recorded in BS EN10250-3:2000, heat analysis mass fraction is in wt%.. ; This standard covers alloy special-steel open-die forgings, forged bars and ring-rolled products after pre-forging, supplied in the quenched-and-tempered condition.; This does not automatically establish a supply standard for cold-heading wire.. ; Table 1 Note 1 allows the manufacturer to add Al, Ti, V, Nb individually or in combination to control grain size.; No new numerical ranges are provided; values cannot be filled as zero or have upper limits arbitrarily determined.. Elements not listed in Table 1/2 shall not be intentionally added without the consent of the purchaser (except additions needed to finish steelmaking).. ; 3.1 requires the heat analysis composition to be in accordance with Table 1 and references A.7/A.8 of EN10250-1.; Clause 3.2: Apply product-analysis tolerances separately under Table 2 and Clause 9.2 of EN10250-1; do not directly expand the default heat-analysis range.. ; Currently, only chemical compositions, grade/steel number correspondences, and related range footnotes are confirmed.; It is not declared that all mechanical properties and the referenced Part 1 have been verified..

Table 3 herein applies to heat (cast) analysis, mass fraction wt%; The permissible deviations for product analysis in Table 4 shall not be directly added to the limits in general Table 3. This document is EN ISO 683-2:2018, adopted without modification and accompanied by the text of ISO 683-2:2016; This record explicitly preserves the identity of EN ISO 683-2-2018 and shall not be called the ISO 2018 edition. Only the chemical composition and source conditions of Table 3 are verified; this does not constitute a guarantee of hardenability, heat treatment, mechanical properties, wire delivery state, or cold heading process. Note a: deviations in heat analysis apply only when hardenability requirements are specified; The deviation in C shall not exceed ±0.01%; P/S is excluded, and the other elements follow Table 4. General Table 3 shall not be automatically relaxed, nor shall H/HH/HL be merged with general grades. Note b: Steel with S increased to approximately 0.10% (including sulfide morphology control) or with the addition of Pb to improve machinability may be requested from the supplier; When S is increased, the upper limit of Mn may be increased by 0.15 percentage points. This agreement is not a default requirement, and approximate values shall not serve as precise automatic limits for this batch; if the Pb range is not listed, values shall not be borrowed from other standards. Original Note: Elements not listed shall not be intentionally added without the consent of the purchaser, except those required to complete the melting process; Elements introduced via scrap steel etc. shall be controlled. An unlisted value must not be assumed to be zero. Note d: lower Si is permitted, but other deoxidation methods must be used; The original text does not provide a uniform lower Si range; agreed conditions shall not automatically replace the range listed in 0.10–0.40%.

Table 3 herein applies to heat (cast) analysis, mass fraction wt%; The permissible deviations for product analysis in Table 4 shall not be directly added to the limits in general Table 3. This document is EN ISO 683-2:2018, adopted without modification and accompanied by the text of ISO 683-2:2016; This record explicitly preserves the identity of ISO 683-2-2016 and shall not be called the ISO 2018 edition. Only the chemical composition and source conditions of Table 3 are verified; this does not constitute a guarantee of hardenability, heat treatment, mechanical properties, wire delivery state, or cold heading process. Note a: deviations in heat analysis apply only when hardenability requirements are specified; The deviation in C shall not exceed ±0.01%; P/S is excluded, and the other elements follow Table 4. General Table 3 shall not be automatically relaxed, nor shall H/HH/HL be merged with general grades. Note b: Steel with S increased to approximately 0.10% (including sulfide morphology control) or with the addition of Pb to improve machinability may be requested from the supplier; When S is increased, the upper limit of Mn may be increased by 0.15 percentage points. This agreement is not a default requirement, and approximate values shall not serve as precise automatic limits for this batch; if the Pb range is not listed, values shall not be borrowed from other standards. Original Note: Elements not listed shall not be intentionally added without the consent of the purchaser, except those required to complete the melting process; Elements introduced via scrap steel etc. shall be controlled. An unlisted value must not be assumed to be zero. Note d: lower Si is permitted, but other deoxidation methods must be used; The original text does not provide a uniform lower Si range; agreed conditions shall not automatically replace the range listed in 0.10–0.40%.

The original informative-annex table has been checked and is for reference only. Clause 7.1.2 requires chemical composition to be determined under the cited standard; the formal normative composition and applicable edition remain unverified. Do not use it as a delivery guarantee, a reverse-search acceptance criterion or a basis for standard-range carbon equivalent.