山东伊莱特重工有限公司技术标准 SHANDONG IRAETA HEAVY INDUSTRY CO.LTD TECHNICAL STANDARD

Q/YLT001-2015

309D、408D 热轧圆钢

309D、408D Hot Rolled Round Steel

2015-05-15 发布 2015-05-15 实施 Issuance Date2015-05-15 Execute Date2015-05-15 山东伊莱特重工有限公司 发布

SHANDONG IRAETA HEAVY INDUSTRY CO.LTD

Released

Q/YLT001-2015

前 言

Introduction

1、本标准是根据山东伊莱特重工有限公司贸易部客户要求起草的。

1、The standard is drafted according to the requirements by SHANDONG IRAETA Trade Department’s clients.

2、本标准由山东伊莱特重工有限公司采购部、检测中心提出。

2、The standard is put forward by SHANDONG IRAETA HEAVY INDUSTRY CO.LTD Purchase Department and Testing Center.

3、本标准由山东伊莱特重工有限公司技术部归口。

3、The standard is centralized management by Technical Department of SHANDONG IRAETA HEAVY INDUSTRY CO.LTD.

4、本标准主要起草单位：技术部、贸易部、采购部、检测中心。

4、The standard is mainly drafted by following committees:Technical Department、Trade Department、Purchase Department、Testing Center.

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5、本标准主要起草人：牛余刚、陈吉元、任秀凤、秦英超、张永庆、 董伟臣、刘守峰。

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5、The standard’s mainly drafters:Yugang Niu、Jiyuan Chen、Xiufeng Ren、Yingchao Qin、YongQing Zhang、Weichen Dong、Shoufeng Liu.

ⅠQ/YLT001-2015

309D、408D 热轧圆钢

309D、408D Hot Rolled Round Steel

1 范围 本标准规定了热轧圆钢尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、质量证明书、包装、标志等要求。

1 Range:This standard specifies requirements for rolled round steel dimensions,

shape, weight and permissible deviations, technical requirements, testing methods, inspection rules, certificate of quality, packing, marking, etc. 本标准适用于直径 20mm-120mm 的热轧圆钢。

The standard is apply to hot rolled round steel which diameter 20mm-120mm. 2 规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注

日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。

2 Normative reference documents:The following files are essential to the

application of this document.For the reference file which noted the date, only the version noted the date is applicable to this document. For the

reference file which not noted the date,The latest version (including all amendments) applies to this document.

GB/T 223 钢铁及合金化学分析方法

Steel and alloy chemical analysis method

GB/T 224 钢的脱碳层深度测定法

Determination of depth of decarburization of steels GB/T 2101 型钢验收、包装、标志及质量证明书的一般规定

General requirements of acceptance,packing,marking and quality certificate for section steel GB/T 4336 碳素钢和中低合金钢火花源原子发射光谱分析方法（常规法）

Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-alloy steel(routine method)

GB/T 17505 钢及钢产品交货一般技术要求

Steel and steel products - general technical delivery requirements GB/T 18254 高碳铬轴承钢

High carbon chromium bearing steel GB/T 20066 钢和铁 化学成分测定用试样的取样和制样方法

Steel and iron - sampling and preparation of samples for the determination of chemical composition GB/T 20123 钢铁 总碳硫含量的测定 高频感应炉燃烧后红外吸收法（常规方法） Steel and iron-determination of total carbon and sulfur content-infrared

absorption method after combustion in an induction furnace(routine method) ASTM E45 钢中夹杂物含量的测定方法

Determination method of content of inclusion in steel

ASTM E112 平均晶粒度测定标准测试方法

Metal-methods for estimating the average grain size

SA-370 钢制品力学性能试验的标准试验方法和定义(与A370-02完全等同)

Standard test methods and definitions for mechanical testing of steel products(equal to A370-02)

SEP1921 边长或直径接近100mm的锻件或锻制钢材超声波试验方法

Side length or diameter close to 100mm forging steel ultrasonic test method 3 尺寸、外形、重量及允许偏差

3 dimensions, shape, weight and permissible deviations

3.1 钢材公称直径为 20mm-120mm，直径允许偏差、不圆度、交货长度应符合表1 要求。

3.1 Steel nominal diameter is 20mm-120mm, the allowable deviation of diameter, the non-roundness, delivery length should be in accordance with the requirements of Table 1.

表 1

3.2 钢材弯曲度为不大于 2.5mm/m，总弯曲度不大于总长度的 0.25%，无硬弯。钢材两端的切 斜度不得大于公称直径的 30%。两端可剪切，无飞边、毛刺。相同长度短尺料单独结捆。 3.2 The bending degree of steel is no more than 2.5mm/m, and the total bending degree is no more than 0.25% of the total length，no hard bending. The slope of the two ends of the steel shall not be greater than the nominal diameter of 30%. Two ends can be cut, no flying edge, burr. The shorter steel which has same length should be knotted separately.

3.3 钢材按实际检斤重量交货。

3.3 Steel will be delivered according to the actual weighing weight. 4 要求

4 Requirements 4.1 牌号及化学成分

4.1 Grades and Chemical Composition

4.1.1 钢的牌号及化学成分（熔炼分析，%）应符合表 2 规定。且熔炼分析 H 小于 2.0ppm，成 品钢材[H]含量小于或等于 0.8ppm，成品钢材[O]含量小于 15ppm。

4.1.1 Grade of steel and chemical composition(smelting analysis)should be in accordance with the requirements of Table 2.Smelting analysis:[H]＜2.0ppm，Finished steel:[H]≤0.8ppm,[O]＜15ppm.

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表2 %

%

DI=[0.062+0.409*(%C)-0.135*(%C)*(%C)]*[1+3.333*(%Mn)]*[1+0.7*(%Si)]*[1+2.16*(%Cr) ]*[1+3*(%Mo)]*[1+0.363*(%Ni)]*[1+0.365*(%Cu)] 。

4.1.2 成品钢材化学成分允许偏差应符合表 3 的规定。

4.1.2 The allowable deviation of finished steel chemical composition should be in accordance with the requirements of Table 3.

表 3 %

4.1.3 在钢材同一横截面上中心处的碳含量和距中心为半径的 80%处碳含量比值为小于或等于

1.15。

4.1.3 On the same cross section of the steel,the ratio of carbon content of the center to the 80% distance center is less than or equal to 1.15.

4.2 冶炼方法 钢应采用电炉/转炉+LF+VD。

4.2 Smelting method: using electric stove/converter +LF+VD 4.3 交货状态热轧。

4.3 Condition of delivery:Hot rolling

4.4 加工方法

热压力加工。

4.4 Processing methods:Thermal pressure process

4.5 力学性能

交货状态表面布氏硬度检验结果供参考，不做交货依据。 4.5 Mechanical Property

Delivery status of surface hardness test results just for reference, do not make delivery basis.

4.6 低倍 Low time

钢材的横截面酸浸低倍组织试片上不得有目视可见的缩孔、气泡、裂纹、夹杂、翻皮、白

点、晶间裂纹。其中心疏松、一般疏松各不大于 1.5 级，锭型偏析合格级别为不大于 1.0 级， 不允许有一般点状偏析、边缘点状偏析。

Steel cross section of acid leaching low times micro-structure test piece may not have a visible shrinkage hole, bubbles, cracks, inclusions, flanging, white, crystalline crack.General loose, ingot segregation, the center of the qualified level is not more than 1.5 grade, does not allow the general point segregation, edge point segregation.

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4.7 非金属夹杂物

4.7 non-metallic inclusion

按 ASTM E45 A 法规定执行，其合格级别按表 4 规定。A 细、B 细、C 细、D 细目标值均不大 于 1.5 级。

Performed by ASTM E45 A rule,qualified level is ruled by Table 4.Target of A、

表 4 不大于（级）

4.8 奥氏体晶粒度

4.8 Austenitic grain size

按 ASTM E112 规定执行，其合格级别为 6 级或更细。

Performed according to ASTM E112,qualified level is 6 level or thinner. 4.9 脱碳层 Decarburization

每边总脱碳层深度不大于钢材公称直径的 1% 。

Total decarburization depth on each side is no more than 1% nominal diameter of steel.

4.10 超声波探伤 Ultrasonic flaw detection