ASTM A105 steel grade is a typical common material (mild carbon steel) for forged carbon steel flange, it used in a lot of places for ambient and higher-temperature service in pressure systems. This material is durable, cost lower, and difficult to break. In case used in a stainless steel piping system it shall be adapted with a lap joint end ring.

ASTM A105鋼級是鍛造碳鋼法蘭的典型常用材料（低碳鋼），它在壓力系統中用于環境和高溫環境。這種材料耐用、成本低、不易斷裂。如果用于不銹鋼管道系統，則應配備搭接端環。

ASTM A105 covers forged carbon steel flange and piping components for ambient and higher-temperature service in pressure systems. It also includes pipe fittings, valves and similar parts. The maximum weight manufactured forging part follows by this standard is 10000 bounds (4540kg). The larger forgings can according by the standard A 266/A266M. This specification do not covers tube sheets and hollow cylindrical forgings for pressure vessel shells .

This specification does not covers raw material which round bar and seamless tubular produced piping components.

ASTM A105涵蓋了壓力系統中用于環境和高溫環境的鍛造碳鋼法蘭和管道部件。它還包括管件、閥門和類似零件。根據本標準制造的鍛件最大重量為10000磅（4540kg）。較大的鍛件可以符合標準A 266/A266M。本規范不包括壓力容器殼體的管板和空心圓柱形鍛件。

本規范不包括圓鋼和無縫鋼管生產管道部件的原材料。

Referenced documents參考文件

The following list of standard apply to these specification:以下標準列表適用于這些規范：

ASTM standards:ASTM標準：

• A266/A266M Specification for carbon steel forgings for pressure vessel components.壓力容器部件用碳鋼鍛件規范。
• A675/A675M Specification for hot-rolled, special quality and mechanical properties, carbon steel bars.碳素鋼熱軋特殊質量和機械性能規范。
• A696 Specification for steel bars, carbon, hot-rolled or cold-finished,special quality, for pressure piping components.壓力管道部件用特殊質量熱軋或冷加工碳素鋼棒規范。
• A788/A788M Specification for steel forgings, general requirements.鋼鍛件規范，一般要求。
• A961/961M general requirements for steel flange, forging fittings, valve and parts for piping applications.管道應用鋼法蘭、鍛造配件、閥門和零件的一般要求。

MSS standard:MSS標準：

• SP44 Standard for steel pipe line flanges鋼管法蘭標準

ASME Standard:ASME標準：

• B16.5 Dimensional standard for steel pipe flanges and flanges fittings鋼管法蘭和法蘭配件的尺寸標準
• B16.9 Wrought steel butt-welding fittings鍛鋼對焊配件
• B16.10 Face-to-face and end-to-end dimensions of ferrous valves鐵質閥門的面對面和端到端尺寸
• B16.11 Forged steel fittings, socket weld and threaded鍛鋼配件，承插焊和螺紋
• B16.34 Valves connect by flanges, threaded and welding end閥門通過法蘭、螺紋和焊接端連接
• B16.47 Large diameter steel flanges大直徑鋼法蘭
• ASME boiler and pressure vessel code:鍋爐和壓力容器規范：

API standard:API標準：

• API-600 Flanged and butt-Welding-end steel gate valves法蘭和對接焊接端鋼制閘閥
• API-602 Compact design carbon steel gate valves for refinery use精煉廠用緊湊型設計碳鋼閘閥

Chemical requirements ASTM A105 化學要求

Element	Composition, %
Carbon	0.35 max
Manganese	0.60-1.05
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.10-0.35
Copper	0.40 max (1)
Nickel	0.40 max (1)
Chromium	0.30 max (1-2)
Molybdenum	0.12 max (1-2)
Vanadium	0.08 max

Mechanical Properties ASTM A105機械性能

Property	Value
Tensile Strength, min (MPa)	485 (70 ksi)
Yield Strength, min (MPa)	250 (36 ksi)
Elongation (%)	22%
Reduction of Area (%)	30%
Hardness (HB)	187 max

1. The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%.
   (2) The sum of chromium and molybdenum shall not exceed 0.32%.

（1） 銅、鎳、鉻、鉬和釩的總和不得超過1.00%。

（2） 鉻和鉬的總和不得超過0.32%。

Note..注意
For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.對于低于規定碳最大值（0.35%）的每0.01%的減少，允許錳比規定最大值（1.05%）增加0.06%，最高可達1.35%。

Terminology術語
For definitions of other terms used in this specification, find in specification A961/A961M.本規范中使用的其他術語的定義見規范A961/A961M。

Ordering information訂購信息
See specification A961/A961M.見規范A961/A961M。

General requirements一般要求
If conflict between the requirements of this specification and Specification A961/A961M. Comply with this specification.

如果本規范的要求與規范A961/A961M之間存在沖突。遵守本規范。

Heat treatment熱處理
Heat treatment is not required except for flanges above Class 300, flanges of special design where the design pressure or design temperature are not known and for items over 4″ NPS and above Class 300. When heat treatment is required, annealing, normalizing, Normalize and temper, normalize and quench and tempering shall be the applied methods.

除300級以上法蘭、設計壓力或設計溫度未知的特殊設計法蘭以及4〃NPS以上300級以上的項目外，不需要進行熱處理。當需要熱處理時，應采用退火、正火、正火回火、正火淬火回火等方法。

Welding
These components can be welded. Welding procedures must comply with ASME Boiler and Pressure Vessel Code Section IX.

焊接

這些部件可以焊接。焊接程序必須符合ASME鍋爐和壓力容器規范第九節。

Forging
ASTM A105 carbon steel can be forged at temperatures in the range of 2200 to 1700 F followed by quenching and tempering or normalizing.

鍛造

ASTM A105碳鋼可以在2200至1700華氏度的溫度下鍛造，然后淬火和回火或正火。

Annealing
Forged parts can be cooled to below 1000 degrees Fahrenheit and then heated to between 1550 degrees Fahrenheit and 1,700 degrees Fahrenheit. Then carry out slow furnace cooling.

退火處理

鍛造零件可以冷卻到1000華氏度以下，然后加熱到1550華氏度到1700華氏度之間。然后進行緩慢的爐內冷卻。

Hydro-static Test
Hydro-static Test shall be conducted by the forging manufacture only when Supplemental S57 of ASTM A961 is specified.

靜水壓試驗

只有在規定了ASTM A961的補充S57時，鍛件制造商才應進行靜水壓試驗。

ASTM A105 flangeASTM A105法蘭

ASTM A105 Flange is a specification of flanges. The specification can include different grades of stainless steel material made flanges. The flanges are of forged carbon steel and are meant for high temperature services.

ASTM A105法蘭是法蘭規范。該規范可以包括不同等級的不銹鋼材料制成的法蘭。法蘭由鍛造碳鋼制成，適用于高溫環境。

ASTM A105 Flange  is a forged carbon steel piping component designed for use in pressure systems at high temperatures. These flanges are widely used in industries like petrochemical, oil & gas, and power generation.

ASTM A105法蘭是一種鍛造碳鋼管道部件，設計用于高溫下的壓力系統。這些法蘭廣泛應用于石化、石油天然氣和發電等行業。

Features特征

• Material:  Made from carbon steel, A105 flanges provide excellent mechanical properties such as tensile strength and toughness.
• Forging Process:  These flanges are produced through forging, resulting in stronger and more reliable products compared to casting.
• Operating Conditions:  Suitable for high-pressure and high-temperature environments (up to approximately 450°C).
• Common Types:  Available in types like Weld Neck, Slip-On, Blind, Socket Weld, and Threaded Flanges.

·材料： A105 法蘭由碳鋼制成，具有優異的機械性能，如抗拉強度和韌性。

·鍛造工藝：這些法蘭是通過鍛造生產的，與鑄造相比，產品更堅固、更可靠。

·操作條件：適用于高壓和高溫環境（高達約 450 ° C ）。

·常見類型：有焊頸、滑套、盲板、承插焊和螺紋法蘭等類型。

Advantages優勢

• High Strength:  Forged construction offers superior mechanical strength for critical applications.
• Corrosion Resistance:  Carbon steel offers adequate resistance with appropriate coatings and treatments.
• Cost-Effective:  A105 flanges are more affordable compared to alloy or stainless steel options.
• Wide Availability:  Available in various sizes and pressure ratings, suitable for diverse applications.

· 高強度：鍛造結構為關鍵應用提供了卓越的機械強度。

· 耐腐蝕性：碳鋼通過適當的涂層和處理提供足夠的耐腐蝕性。

· 經濟高效：與合金或不銹鋼選項相比， A105 法蘭更實惠。

· 廣泛可用性：提供各種尺寸和壓力等級，適用于各種應用。

Applications應用

• Oil and Gas Industry:  Used in pipelines and pressure vessels.
• Petrochemical Industry:  Handles fluids and gases under high pressure and temperature.
• Power Plants:  Employed in pressure systems such as boilers and heat exchangers.
• Chemical Industry:  Suitable for corrosive chemicals and high-pressure applications.
• Water Treatment:  Used in high-pressure water treatment plants.

·石油和天然氣工業：用于管道和壓力容器。

·石油化工：處理高壓高溫下的流體和氣體。

·發電廠：用于鍋爐和熱交換器等壓力系統。

·化學工業：適用于腐蝕性化學品和高壓應用。

·水處理：用于高壓水處理廠。

ASTM A105 flanges  are versatile and essential components for high-pressure systems in industries like petrochemical, oil & gas, and power generation. With their carbon steel construction, they offer excellent mechanical properties, making them suitable for high-temperature and high-pressure environments. These flanges are available in multiple configurations, providing reliable and cost-effective solutions for industrial applications.

ASTM A105法蘭是石化、石油和天然氣以及發電等行業高壓系統的通用和基本部件。憑借其碳鋼結構，它們具有優異的機械性能，使其適用于高溫高壓環境。這些法蘭有多種配置，為工業應用提供可靠且經濟高效的解決方案。