ASTM A234 Scope

1.1该规范涵盖了ASME B16.9，B16.11，MSS-SP-79，MSS-SP-83和MSS-SP-95的最新修订版，涵盖了无缝和焊接结构的锻造碳钢和合金钢配件。这些配件用于压力管道和压力容器制造，以在中等和升高的温度下进行服务。与这些ASME和MSS标准不同的配件应根据规范A 960/A 960m的补充要求提供。

1.2为需要更高程度检查的配件提供了可选的补充要求。如果需要，可以按顺序指定这些补充要求中的一个或多个。

1.3此规范不涵盖铸件焊接配件或从铸件加工的配件。铸钢焊接配件由216/A 216m和217m的规格管辖。

1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.

1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

一般说明：All values are maximum unless otherwise indicated.

Chemical Composition (%) of ASTM A234

年级	C	Mn	P	S	Si	Cr	莫	你	Cu	V	NB
WPB	0.3	0.29-1.06	0.05	0.058	0.1min	0.4	0.15	0.4	0.4	0.08	0.02
WPC	0.35	0.29-1.06	0.05	0.058	0.1min	0.4	0.15	0.4	0.4	0.08	0.02
WP11 CL1	0.05-0.15	0.30-0.60	0.03	0.03	0.50-1.00	1.00-1.50	0.44-0.65	-	-	-	-
WP11 CL2/3	0.05-0.20	0.30-0.80	0.04	0.04	0.50-1.00	1.00-1.50	0.44-0.65	-	-	-	-

Notes:

• For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum will be permitted, up to a maximum of 1.35%.
• Cu，Ni，Cr和Mo的总和不得超过1.00％。
• The sum of Cr and Mo shall not exceed 0.32%.
• The maximum carbon equivalent (C.E.) shall be 0.50, based on heat analysis and the formula C.E.=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.

ASTM A234的机械性能

拉伸要求	WPB	WPC，WP11CL2	WP11CL1	WP11CL3
Tensile Strength, min, ksi[MPa]	60-85	70-95	60-85	75-100
(0.2% offset or 0.5% extension-under-load)	[415-585]	[485-655]	[415-585]	[520-690]
Yield Strength, min, ksi[MPa]	32	40	30	45
	[240]	[275]	[205]	[310]

Where the wall thickness lies between two values above, the min elongation value is determined by the following equations:

• Longitudinal E=48t+15.00
• Transverse E=32t+10.00
• E = 2in [50mm]的伸长率，％
• t =样品的实际厚度，在[mm]中

钢肘用于在两个管道或管子之间安装，可以改变方向，通常这些碳钢肘部通过连接末端区分，末端可以被加工成对接焊接，螺纹或插座，因此碳钢肘部为由对接焊缝，螺纹肘套筒肘和其他系列组成。材料是根据应用使用，例如高温使用，卫生配件，常规工业用途等选择的。

What is the manufacturing process of ASTM A234 WPB pipe fittings?

WPB在任何过程中都不是短的。它只是ASTM开发的标识符。所讨论的配件的制造方式与该规范的配套管相同。

在非常大的尺寸中，配件可以像许多大型配件一样分工制造并焊接在一起。

The term used for the manufacturing is called “wrought” which means it is worked as opposed to being cast or forged.

至于w weldable，我不确定这是正确的，因为这是许多可焊接但可携带名称以外的w的管道配件。请注意以下参考。

LATEST STANDARD IS:

• ASTM A234配件材料包括杀死的钢，疑问，条，板，无缝或HFW（融合焊接）管道产品，并添加了填充金属。
• ASTM A234标准涵盖了无缝和焊接类型的钢配件。ASTM A234管配件在压力管道和压力容器制造中应用。
• ASTM A234/A234M-07用于中等和高温服务的碳钢和合金钢的管道配件的标准规范

该标准涵盖了无缝和焊接结构的锻造碳钢配件，这些配件符合ASME B16.9和B16.28的尺寸规格。这些配件主要用于压力管道和压力容器制造，以在中等和升高的温度下进行服务。

ASTM A234的等级

ASTM A234规范具有许多等级，例如WPB，WPC，WP11，WP12，WP22，WP91等。

In these standard Grade WPB is the most common material used for medium and high temperature pipelines. W means weldable, P means pressure, B is grade b, refer to the minimum yield strength.

原料来源ASTM A234由钢铁皮普e fittings may be from steel pipe, such as ASTM A106 Gr.B and C. Also from steel plate, as ASTM A285 Gr.C, ASTM A516 Gr 70, ASTM A572 etc.

Process

Killed steel, with forgings, bars, plates, sheet, and seamless or fusion-welded tubular products with filler metal added. Forging or shaping operations performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations.

Heat Treatment

After forming at an elevated temperature, fittings are cooled to a temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. Heat treatment temperatures specified are metal (part) temperatures. Heat-treated fittings are to be treated according to paragraph 7 in Specification A960/A960M.