ASTM A420 WPL6 Elbow

ASTM A420 WPL6年级与ASTM A420相关联for pipe fittings manufactured of Wrought Carbon Steel.

ASTM A420 / A420M-07用于低温服务的锻炼钢和合金钢管道配件的标准规范。WPL6是碳钢的标准化等级，在-50度F中测试的夏比冲击用于低温服务。另见Flanges还参见ASTM A333等级1和6（管道）和A350 LF2。

ASTM A420 WPL6 Elbow after complete quality and performance measure inspection. These are widely appreciated for excellent quality, corrosion abrasion and high tensile strength with long life service.

材料s shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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ASTM A420的范围

1.1本规范涵盖锻造碳钢和合金钢配件无缝和焊接结构，由ASME B16.9，ASME B16.11，MSS SP-83，MSS SP-95和MSS的最新版本覆盖SP-97。与这些ASME和MSS标准不同的配件，应根据规格A960 / A960M的补充要求S58提供。这些配件用于低温下的压力管道和压力容器服务。

1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When desired, one or more of these supplementary requirements shall be specified in the order.

1.3本规范以英寸为单位和SI单元表示。但是，除非订单指定适用的“M”规格指定（SI单位），否则材料应为英寸磅单位提供。

1.4 SI单位或英寸磅单元中所述的值将被单独视为标准。在文中，SI单位显示在括号中。每个系统中所述的值可能不是精确的等价物;因此，每个系统应独立使用。组合来自两个系统的值可能导致与标准不符。

ASTM A420的化学成分（％）

年级	C	MN.	P	S	Si
WPL6（1）（2）	0.3	0.60-1.35	0.035	0.04	0.15-0.30
WPL9	0.2	0.40-1.06	0.03	0.03	-

年级	你	Cu	Cr	莫	V	NB.
WPL6（1）（2）	0.4	0.4	0.3	0.12	0.08	0.02
WPL9	1.60-2.24	0.75-1.25	-	-	-	-

一般注意事项：
All values are maximum unless otherwise indicated.

NOTES:
（1）对于每次减少0.01％C以下0.30％，允许增加0.05％以上1.06％，最大为1.35％。
（2）由锻件制成的配件可具有1.35％MAX MN。

ASTM A420的机械性能

拉伸要求	WPL6	WPL9
Tensile Strength min, ksi [MPa]	60-85 [415-585]	63-88 [435-610]
屈服强度 min, ksi [MPa]	35 [240]	46 [315]

在壁厚位于上述两个值之间，最小伸长值由以下等式确定：

• WPL6，WPL9.
• 纵向E = 48T + 15.00，E = 48T + 13.00
  
• 横向E = 32T + 6.50，E = 32T + 8.00
  
• e = 2in [50mm]，％的伸长率
  
• T =样本的实际厚度，在[mm]中

影响测试属性

由于这些管件主要用于低温服务，因此必须考虑夏比V-intch冲击试验的特性。

Charpy Impact Requirements for WPL6, WPL9, and WPL3

标本的大小	A*		B*
毫米	FT·LBF.	J	FT·LBF.	J
10到10.0	13	17.6	10	13.6
10 by 7.5	10	13.6	8	10.8
10 by 5.0	7	9.5	5	7.0
10乘2.5	4	5.4	3	4.1

A * Charpy V-Notch撞击值所需的接受（三个标本的平均值）
B *最小夏比V-intch撞击值，不需要重新测试（仅为一个标本，只有一个标本）WPL8的Charpy Impact要求

标本的大小	A*		B*
毫米	FT·LBF.	J	FT·LBF.	J
10到10.0	25.0	33.9	20.0	27.1.
10 by 7.5	21.0	28.5	17.0	23.1.
10 by 5.0	17.0	23.1.	14.0	19.0
10乘2.5	8.0	10.8	6.0	8.1

A * Charpy V-Notch撞击值所需的接受（三个标本的平均值）
B *最小Charpy V-Notch撞击值，无需重新测试（仅为一个标本）

冲击试验温度

年级	°F [°C]
WPL6	−50 [−45]
WPL9	-100 [-75]
WPL3	-150 [-100]
WPL8	-320 [-195]

材料和制造

The raw material for these fittings shall be fully killed steel, consisting of forgings, bars, plates, sheet, and seamless or fusion welded tubular products(pipes, tubes, or cylinders).

钢材应使用所需的熔化实践制造，生产钢材应符合ASTM A420的影响要求。ASTM A420配件可以通过锻造或形成包括锤击，压制，刺穿，挤出，镦粗，工作，弯曲，熔接，焊接或加工的操作来制造，或者通过这些操作中的两个或更多个的组合来制造。应适用成型程序，即它不会在配件中产生损害缺陷。所有配件均由焊接维修提供。配件的焊接接头应按照ASME锅炉和压力容器代码第1款段的UW-35（A）段的要求来完成。

Heat Treatment

All fittings shall be furnished in the normalized, normalized and tempered, annealed, or quenched and tempered condition. All welding shall be completed prior to the austenitizing heat treatment. After forming, the fittings shall be allowed to cool below the lower critical before applying one of the heat treatments. When specified, post-weld heat treatment may be required.

产品和标准

• ASME B16.9 - 锻造锻炼钢杆焊接螺纹
• ASME B16.11 -FORGE钢配件，侧锁焊接螺纹
• MSS SP-25 - 阀门，配件，法兰和工会的标准标记系统
• MSS SP-79 -Socket Welding Reducer Inserts
• MSS SP-83 -Steel管道，套筒焊接和螺纹
• MSS SP-95 - Swage(d) Nipples and Bull Plugs
• MSS SP-97 - 岩体加强锻造分支出口配件 - 插座焊接，螺纹和Buttwelding末端

Tests and Inspections

Pipe fittings manufactured to ASTM A420 shall take the following tests or inspections: dimensional inspection, visual examination, hydrostatic test(when required), chemical analysis, tensile test, impact test, radiographic test(RT).