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S420G2+QT舞钢海上焊接结构钢板执行标准EN10225 2009交货状态淬火回火

一、S420G2+QT系列钢板基本信息

S420G2+QT属于固定海上构架用焊接结构钢，执行标准：EN10225-2009。

执行：EN10225-2009标准的牌号：

S355G2+N S355G5+M S355G3+N S355G6+M S355G7+N S355G8+N S355G9+N S355G10+M S420G1+QT S420G1+M S420G2+QT S420G2+M S460G1+QT S460G1+M S460G2+QT S460G2+M

本标准范围内的钢板牌号以及限制厚度：

S355G2+N,S355G5+M,最大20mm；

S355G3+N,S355G6+M,最大40mm；

S355G7+N,S355G8+N,S355G9+N,S355G10+M,最大150mm；

S355G7+M,S355G8+M,S355G9+M,S355G10+M,最大100mm；

S420G1+QT,S420G1+M,S420G2+QT,S420G2+M,最大100mm；

S460G1+QT,S460G1+M,S460G2+QT,S460G2+M,最大100mm。

本标准规定了用于固定近海岸构架的可焊接结构钢的要求，钢板厚度范围为≤150mm。

本标准适用于设计用来在近海岸区域构架使用的钢材，而非用于架构海底管线、升降器、生产设备、生产管线和其他用途的近海岸用钢。其最初适用于北海区域，但考虑到气温等环境条件后，也可以在其他区域适用。

对由钢板焊接而成的中空型钢，欧洲标准只对钢板材料要求。

明确规定最小的屈服强度达到460MPa以及在温度低至-40℃时的低温冲击试验。

欧洲标准适用于生产厂直供和中间商供货的产品。

二、S420G2+QT轧制工艺/交货状态

正火轧制：在特定温度范围内完成最终变形使材料状况与正火后状况一致的轧制过程。使得在随后进行的正火中，仍能满足规定的力学性能的要求。为达到本欧洲标准的目的，此交货状态和正火交货状态均以+N标注；在国标出版物中对正火轧制和热机械轧制的描述可能为控制轧制，但这些产品的适用性不同时，需要适用不同的术语来区别。

热机轧制：最终变形在一定的温度范围内进行，使材料具有单独采用热处理无法获得或重现的一些性能。在特定温度范围内完成最终变形使材料状态的某些属性与单独进行热处理时不能达到一致的效果或重现的轧制过程。为达到本欧洲标准的目的，此交货状态以+M标注。热机械轧制后达到交货状态标注为+M时可能包括已经或未经回火来提升冷却速率的过程。

淬火和回火：淬火使钢板比在静止空气中冷却更快的做法，淬火也包括直接淬火。回火通常在淬火硬化后或其它使属性达到要求程度的热处理后应用于钢板的热处理，其包括加热到特定温度（＜Ac1)和在适当速率下冷却后一次或多次浸入液体。为达到本欧洲标准的目的，经过淬火和回火处理后的交货状态以+Q标注。

三、S420G2+QT冶炼方法

钢由氧气转炉或电炉冶炼:所有牌号的钢都是镇静钢，且为细晶粒钢。另外，一部分钢应进行真空除气或炉外精炼。

钢板应经正火炉正火或正火轧制（+N）、热机轧制（+M）状态供货，买方应在咨询或下订单时明确说明。交货状态（+N）和（+M）只限于最大厚度40mm。

S355G2+N钢板与EN10025-3几乎没有差别，规定的最小屈服强度Re=355MPa、冲击温度为-20℃、经正火或正火轧制后交货。

S355G6+M钢板与EN10025-4几乎没有差别，规定的最小屈服强度Re=355MPa、冲击温度为-40℃、经热机轧制后交货。

钢板应以正火炉中正火，热机轧制或淬火及回火后的状态交货。买方应在咨询或下订单时明确说明适当级别。交货状态（+N）只限于厚度≤150mm的钢板，交货状态（+M）和（+QT）则只限于厚度≤100mm的钢板。

S355G7或S355G7+M钢板与EN10025-3有较大差别，规定的最小屈服强度Re=355MPa、冲击温度为-40℃、经正火或正火轧制后交货。

S460G2+QT或S460G2+M钢板通过控制的化学元素，特别是碳元素，钢板与EN10025-6有较大差别，规定的最小屈服强度Re=460MPa、冲击温度为-40℃并规定了厚度方向性能、经淬火和回火后交货。

对钢板的最大允许CEV和Pcm值在表中给出。除S355G2+N,G3+N,G5+M和G6+M级别根据熔炼分析得出外，其余牌号均适用于产品分析。

CEV值应适用于除S355G9+N、G9+M,G10+N和G10+M以外的所有牌号，而这4个应提供Pcm值。

牌号	CEV最大	Pcm最大
S355G2+N S355G3+N S355G5+M S355G6+M	0.43	没规定
S355G7+N S355G7+M S355G8+NS355G8+M	0.43 0.24
S355G9+N S355G10+N	0.43 0.22
S355G9+M S355G10+M	0.41^b/0.42^c	0.21^b/0.22^c
S420G1+QT S420G1+M S420G2+QT S420G2+M	0.42	0.22^d
S460G1+QT S460G1+M S460G2+QT S460G2+M	0.43 0.22
b t≤75mm c 75mm＜t≤100mm d A Pcm值的0.23，t≤15mm

四、S420G2+QT系列钢板化学成分

生产厂应没炉提供一个熔炼分析结果。当要求时，应每炉提供两个或不大于40吨提供一个成品分析结果，选择最严者，样品可用力学性能样坯进行分析。

力学性能试验应在10℃至35℃温度下进行，除非冲击试验温度另有规定。拉伸试验应按EN10002-1进行，可测得抗拉强度Rm、屈服强度Re和延伸率A，对焊点的横向拉伸试验，仅读取抗拉强度值Rm。在EN ISO2566-1的范围中排除了淬火和回火钢，然而，本标准在技术上可以采用。

冲击试验应根据EN100045-1进行。三个试验结果的平均值应符合规定要求，单个值可低于规定的最小平均值，但不能低于规定值得70%。当发生下列情况之一时，三个附加试样应从同一样坯中规定制取，并进行试验：

如果三个冲击值的平均值低于规定的最小平均值；

如果平均值满足规定要求，但有2个单值低于规定的最小平均值；

如果任一单值低于规定的最小平均值的70%。

6个试样的平均值应不低于规定的最小平均值，不超过2个单值低于规定最小平均值，且不超过1个单值低于规定最小平均值的70%。

牌号	C最大	Si	Mn	P最大	S最大	Cr最大	Mo最大	Ni最大	Alt	Cu最大	N最大	Nb最大	Ti最大	V最大	Cr+Mo+Ni+Cu最大	Nb+V最大	Nb+V+Ti最大
熔炼成分
S355G2+N	0.2	≤0.5	0.9-1.65	0.035	0.3		0.1	0.5	≥0.02	0.35	0.015	0.06	0.03	0.12
S355G3+N	0.18	≤0.5	0.9-1.65	0.03	0.25-0.3		0.1	0.5	≥0.02	0.35		0.06	0.03	0.12
S355G5+M	0.14	≤0.5	≤1.6	0.035	0.3		0.2	0.3	≥0.02	-0.015		0.05	0.05	0.1
S355G6+M	0.14	≤0.5	≤1.6	0.03	0.25		0.2	0.3	≥0.02	-0.015		0.05	0.05	0.1
熔炼成分和成品成分
S355G7+M S355G7+N	0.14	0.15-0.55	1-1.65	0.02	0.01	0.25	0.08	0.50	0.015-0.055	0.3	0.01	0.04	0.025	0.06	0.9	0.06	0.08
S355G8+M S355G8+N	0.14	0.15-0.55	1-1.65	0.02	0.007	0.05	0.08	0.5	0.015-0.055	0.3	0.01	0.04	0.025	0.06	0.9	0.06	0.08
S355G9+N S355G9+M	0.12	0.15-0.55	≤1.65	0.02	0.01	0.2	0.08	0.7	0.015-0.055	0.3	0.01	0.03	0.025	0.06	-0.06		0.08
S355G10+N S355G10+M	0.12	0.15-0.55	≤1.65	0.015	0.005	0.20	0.08	0.7	0.015-0.055	0.3	0.01	0.03	0.025	0.06	-0.06		0.08
S420G1+QT S420G1+M	0.14	0.15-0.55	≤1.65	0.02	0.01	0.25	0.25	0.7	0.015-0.055	0.3	0.01	0.04	0.025	0.08		0.09	0.11
S420G2+QT S420G2+M	0.14	0.15-0.55	≤1.65	0.02	0.10	0.25	0.25	0.7	0.015-0.055	0.3	0.01	0.04	0.025	0.08	0.9	0.9	0.11
S460G1+QT S460G1+M	0.14	0.15-0.55	≤1.65	0.02	0.01	0.25	0.25	0.7	0.015-0.055	0.3	0.01	0.04	0.025	0.08	0.9	0.09	0.11
S460G2+QT S460G2+M	0.14	0.15-0.55	≤1.65	0.02	0.007	0.25	0.25	0.7	0.015-0.055	0.3	0.01	0.04	0.025	0.08	0.9	0.09	0.11

五、S420G2+QT系列钢板机械性能

(一)S350级的钢板机械性能

牌号	抗拉强度		屈服强度						最小V型冲击功		最大厚度
	≤100	＞100	≤16	16＜t≤25	25＜t≤40	40＜t≤63	63＜t≤100	100＜t≤150	温度	功
S355G2+N	470-630		355	345	-	-	-	-	-20	50	20
S355G3+N	470-630		355	345	345	-	-	-	-40	50	40
S355G5+M	470-610		355	345	-	-	-	-	-20	50	20
S355G6+M	470-610		355	345	345	-	-	-	-40	50	40
S355G7+N	470-630	460-620	355	355	345	335	325	320	-40	50	150
S355G8+N	470-630	460-620	355	355	345	335	325	320	-40	50	150
S355G7+M	470-630	-355		355	345	335	325	-	-40	50	100
S355G8+M	470-630	-355		355	345	335	325	-	-40	50	100
S355G9+N	470-630	460-620	355	355	345	335	325	320	-40	50	150
S355G9+M	470-630	-355		355	345	335	325	-	-40	50	100
S355G10+N	470-630	460-620	355	355	345	335	325	320	-40	50	150
S355G10+M	470-630	-355		355	345	335	325	-	-40	50	100

（二）S420级的钢板机械性能

牌号	抗拉强度		屈服强度					冲击温度		最大厚度
牌号	t≤40	40＜t≤100	t≤16	16＜t≤40	40＜t≤63	63＜t≤80	80＜t≤100	温度	功
S420G1+QT	500-660	480-640	420	400	390	380	380	-40	60	100
S420G1+M	500	480	420	400	390	380	380	-40	60	100
S420G2+QT	500	480	420	400	390	380	380	-40	60	100
S420G2+M	500	480	420	400	390	380	380	-40	60	100

（三）S460级的钢板机械性能

厚度范围	≤16	16＜t≤25	25＜t≤40	40＜t≤63	63＜t≤80	80＜t≤100
最小屈服强度	460	440	420	415	405	400
抗拉强度	540-700	530-690	520-680	515-675	505-665	500-660
最小伸长率	17
冲击功	-40℃ 60J

24小时联系电话：0371-53377015

S420G2 + QT Wugang Offshore welded structural steel plate executive standard EN10225 2009 delivery state quenching and tempering can be used for transportation

S420G2 + QT series steel plate basic information

S420G2 + QT belongs to welded structural steel for fixed offshore structure, and the execution standard is EN10225-2009.

Execution: the license number of the EN10225-2009 standard:

S355G2+N S355G5+M S355G3+N S355G6+M S355G7+N S355G8+N S355G9+N S355G10+M S420G1+QT S420G1+M S420G2+QT S420G2+M S460G1+QT S460G1+M S460G2+QT S460G2+M

The number of steel plates within the scope of this standard, as well as the limiting thickness:

S355G2 N, S355G5M, maximum 20mm;

S355G3 N, S355G6M, maximum 40mm;

S355G7 N, S355G 8 N, S355G9 N, S355G10 M, maximum 150mm;

S355G7 M, S355G 8 M, S355G9 M, S355G10 M, maximum 100mm;

S420G1+QT, S420G1+M, S420G2+QT, S420G2+M, maximum 100mm;

S460G1 QT,S460G1 M, S460 G2 QT,S460G2 M, up to 100 mm.

This standard specifies the requirements for weldable structural steel for fixed near-coastal frames, and the thickness range of the steel plate is ≤ 150 mm.

This standard applies to steel designed for use in near-coastal areas, rather than near-coastal steel for structural submarine pipelines, elevators, production equipment, production pipelines and other uses. It was originally suitable for the North Sea region, but it can also be applied in other regions, taking into account environmental conditions such as temperature.

For hollow steel welded by steel plate, the European standard only requires steel plate material.

The minimum yield strength was specified to reach 460 MPa and a low temperature impact test at a temperature of down to-40.degree. C.

European standards apply to products supplied directly and by middlemen.

S420G2+QT rolling process/delivery status.

Normalizing rolling: The final deformation is completed within a specific temperature range to make the material condition consistent with the post-normalized condition. So that the requirements of the specified mechanical property can be met in the subsequent normalizing. In order to achieve the purpose of this European Standard, both the delivery and the normalized delivery conditions are marked with the + N; the description of the rolled and hot mechanical rolling in the national standard may be controlled rolling, but the suitability of these products is different and different terms are required to distinguish.

Hot mill rolling: the final deformation is carried out in a certain temperature range, which makes the material have some properties that can not be obtained or reproduced by heat treatment alone. The final deformation in a specific temperature range makes some properties of the material state consistent with the rolling process that can not achieve the same effect or recurrence when heat treatment is carried out alone. For the purpose of this European standard, this delivery status is marked with M. When the delivery state is marked M after hot mechanical rolling, the process of increasing the cooling rate has been or has not been tempered.

Quenching and tempering: quenching makes the steel plate cool faster than in static air, and quenching also includes direct quenching. Tempering is usually applied to the heat treatment of steel plates after quenching and hardening or other heat treatment that makes the properties meet the requirements, including heating to a specific temperature (< Ac1) and soaking liquid one or more times after cooling at an appropriate rate. In order to achieve the purpose of this European standard, the delivery status after quenching and tempering is marked by Q.

S420G2 QT smelting method

Steel is smelted by oxygen converter or electric furnace: all grades of steel are calm steel and fine grain steel. In addition, some steel should be vacuum gas removal or furnace refining.

The steel plate shall be supplied through normalizing or normalizing rolling (N), hot mill rolling (M) status, and the buyer shall specify when consulting or placing an order. Delivery status (N) and (M) are limited to a maximum thickness of 40 mm.

There is little difference between S355G2 N steel plate and EN10025-3. The minimum yield strength Re=355MPa, impact temperature is-20 ℃ and delivered after normalizing or normalizing rolling.

S355G6+M steel plate is almost no difference from EN100254. The specified minimum yield strength Re=355MPa, impact temperature is 40℃, which is delivered after hot rolling.

The steel plate shall be delivered in the state of normalizing, hot rolling or quenching and tempering in the normalizing furnace. The buyer shall specify the appropriate level when consulting or placing an order. The delivery state (N) is limited to the steel plate with thickness ≤ 150mm, while the delivery state (M) and (QT) are limited to the steel plate with thickness ≤ 100mm.

There is a great difference between S355G7 or S355G7 M steel plate and EN10025-3. The minimum yield strength Re=355MPa, impact temperature is-40 ℃ and delivered after normalizing or normalizing rolling.

The S460G2 + QT or S460G2 + M steel plate is controlled by chemical elements, in particular carbon elements, with a large difference between the steel plate and the EN10025-6. The specified minimum yield strength Re = 460 MPa, the impact temperature is-40 ℃ and the thickness direction performance is specified, and the product is delivered after quenching and tempering.

The maximum allowable CEV and PCM values for the steel plate are given in the table. Except for S355G2 N, G3 N, G5 M and G6 M grades, the other grades are suitable for product analysis.

The CEV value shall be for all grades except S355G9 + N, G9 + M, G10 + N and G10 + M, and the 4 shall provide the Pcm value.

the name of a shop

CEV maximum

Pcm maximum

S355G2+N S355G3+N S355G5+M S355G6+M

point four three

There are no rules.

S355G7+N S355G7+M S355G8+NS355G8+M

0.43 0.24

S355G9+N S355G10+N

0.43 0.22

S355G9+M S355G10+M

0.41b/0.42c

0.21b/0.22c

S420G1+QT S420G1+M S420G2+QT S420G2+M

point four two

0.22d

S460G1+QT S460G1+M

S460G2+QT S460G2+M

0.43 0.22

B t ≤ 75mm

c 75mm<t100mm.

0.23, t ≤ 15mm of d A Pcm value

Chemical composition of S420G2 QT Series Steel Plate

The production plant should not have a furnace to provide a smelting analysis result. When required, two or not more than 40 tons of finished product analysis results should be provided per furnace, and the samples can be analyzed by mechanical properties billet when the worst is selected.

The mechanical properties test shall be carried out at 10 ℃ to 35 ℃ unless the impact test temperature is otherwise specified. The tensile test should be carried out according to EN10002-1, and the tensile strength Rm, yield strength Re and extensibility A can be measured. The transverse tensile test of solder joint can only read the tensile strength value Rm.. Quenching and tempering steel are excluded from the range of EN ISO2566-1, however, this standard can be used technically.

The impact test should be carried out according to EN100045-1. The average value of the three test results should meet the prescribed requirements, and the single value can be lower than the prescribed minimum average value, but not less than 70% of the prescribed value. When one of the following occurs, the three additional samples shall be prepared from the same billet and tested:

if the average value of the three impact values is lower than the specified minimum average value;

If the average meets the specified requirements, there are 2 single values below the specified minimum average;

If any single value is less than 70% of the specified minimum average.

The average value of 6 samples shall not be lower than the specified minimum average value, no more than 2 single values shall be lower than the specified minimum average value, and not more than 1 single value shall be lower than 70%of the specified minimum average .

Contact: Yu Shang

24 hours contact: 037153377015

Address: 195 construction road, Wugang economic and industrial park

Zhengzhou address: room 0903, no. 9, Zhengshang international building, navigation road, Zhengzhou

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