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WITHDRAWN ASTM A304-11 1.10.2011 preview

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ASTM A304-11

Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements

STANDARD published on 1.10.2011

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The information about the standard:

Designation standards: ASTM A304-11
Note: WITHDRAWN
Publication date standards: 1.10.2011
SKU: NS-1944
The number of pages: 48
Approximate weight : 144 g (0.32 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Steel bars and rods

Annotation of standard text ASTM A304-11 :

Keywords:
alloy steel bars, carbon steel bars, end quench hardenability, steel bars: Alloy steel bars--specifications, Alternating-current permeability, End-quench hardness, Hardenability (steel)--specifications, Structural steel (SS) bars--specifications, ICS Number Code 77.140.60 (Steel bars and rods)

Additional information

1. Scope

1.1 This specification covers hot-worked alloy, carbon, and carbon-boron steels in a variety of compositions and sizes, which may attain specified depth of hardening in the end quench test. These steel compositions are identified by the suffix letter “H” added to the conventional grade number.

1.2 This specification provides for analyses other than those listed under Tables 1 and 2. Special hardenability limits are also permissible when approved by the purchaser and manufacturer.

1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

TABLE 2 Chemical Requirements of Carbon H-Steels^A


UNS Designation^B	Grade Designation	Chemical Composition, %
UNS Designation^B	Grade Designation	Carbon	Manganese	Phosphorus, max	Sulfur, max	Silicon

H 10380	1038 H	0.34–0.43	0.50–1.00	0.040	0.050	0.15–0.35
H 10450	1045 H	0.42–0.51	0.50–1.00	0.040	0.050	0.15–0.35
H 15220	1522 H	0.17–0.25	1.00–1.50	0.040	0.050	0.15–0.35
H 15240	1524 H	0.18–0.26	1.25–1.75	0.040	0.050	0.15–0.35
H 15260	1526 H†	0.21–0.30	1.00–1.50	0.040	0.050	0.15–0.35
H 15410	1541 H	0.35–0.45	1.25–1.75	0.040	0.050	0.15–0.35

H 15211^C	15B21 H^C	0.17–0.24	0.70–1.20	0.040	0.050	0.15–0.35
H 15351^C	15B35 H^C	0.31–0.39	0.70–1.20	0.040	0.050	0.15–0.35
H 15371^C	15B37 H^C	0.30–0.39	1.00–1.50	0.040	0.050	0.15–0.35
H 15411^C	15B41 H^C	0.35–0.45	1.25–1.75	0.040	0.050	0.15–0.35
H 15481^C	15B48 H^C	0.43–0.53	1.00–1.50	0.040	0.050	0.15–0.35
H 15621^C	15B62 H^C	0.54–0.67	1.00–1.50	0.040	0.050	0.40–0.60
†Correction made editorially

^A Standard H Steels can be produced with a lead range of 0.15–0.35 %. Such steels are identified by inserting the letter “L” between the second and third numerals of the grade designation, for example, 15L22 H. Lead is generally reported as a range of 0.15–0.35 %.

^B New designations established in accordance with Practice E527 and SAE J 1086, Recommended Practice for Numbering Metals and Alloys (UNS).

^C These steels can be expected to have 0.0005 % min boron content.

2. Referenced Documents

J1086	Numbering Metals and Alloys
E112-13(2021)	Standard Test Methods for Determining Average Grain Size
A255-20a	Standard Test Methods for Determining Hardenability of Steel (Includes all amendments and changes 11/16/2020).
A108-24	Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
A29/A29M-23	Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
E527-23	Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

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