Alloy Steel Flanges | ASTM A182 F1-F91

PM Industries manufactures, supplies, and stocks Alloy Steel for engineering work that asks more of a metal than plain carbon steel can give. Alloy steel is iron and carbon with one or more added elements such as chromium, nickel, molybdenum, manganese, vanadium, or tungsten. Those additions lift strength, hardness, toughness, wear resistance, corrosion resistance, and heat resistance, so the material holds up in hard industrial service. By changing the composition and the heat treatment, the same family can be tuned for structural parts, machine components, automotive parts, tools, and high-stress aerospace work.

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The grades split broadly into low-alloy and higher-alloy types. Low-alloy steels are valued for high strength and good hardenability, while higher-alloy grades bring better corrosion resistance and performance at elevated temperature. That spread is what makes the family so adaptable. Engineers reach for alloy steel when carbon steel runs short on durability or service life, especially under heavy loads, shock, fatigue, heat, or wear. It turns up in shafts, gears, bolts, pressure vessels, pipelines, construction equipment, and cutting and forming tools, where its balance of properties keeps the part working safely.

A large part of the appeal is that the properties can be set during processing. Quenching, tempering, normalizing, and hardening let a maker hit precise design targets from a single base grade. Alloy steel does call for more careful fabrication than mild steel, and some grades need protection against corrosion that stainless steel would not, but the cost-to-performance balance is strong for industrial and structural work. The combination of strength, durability, and design flexibility keeps it among the most-used material classes in manufacturing, construction, transport, and heavy engineering.

As a manufacturer, supplier, and stockist of alloy steel, PM Industries ships standard and custom grades and sizes against fast quotes.

Specification Alloy Steel Flanges

StandardsANSI/ASME B16.5, B16.48, ANSI Flanges, GOST Flanges, DIN Flanges, EN-1092, B16.47 Series A & B, ASME Flanges, EN Flanges, AWWA Flanges, BS Flanges.
JIS Standard 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
DIN FLANGESDIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566, 2641, 2637, 2655, 2634, 2636, 2632, 2633, 2638, 2642, 2573, 2635.
Pressure RatingClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
TypesThreaded, Plate, Screwed, Forged.
Supporting materialGasket, Ring Joint, Flange Bolts
Size range1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Production techniqueForged, machined and Heat treated
Available Flange TypeWeld Neck Flanges, RTJ Flanges, Slip On Flanges, Spectacle Blind Flanges, Flanges Gaskets, Square Flanges, Standard Insert Flanges, High Hub Blinds Flanges, Flat Flanges, forged flanges, Weldo / Nipo Flanges, Jacket Insert Flanges, Tongue groove Flanges, Blind Flanges, Socket Weld Flanges, Large diameter Flanges, Long Weld Neck Flanges, Spacer Blinds, SWRF Flanges, SORF Flanges, Angle Face Rings Flanges, Spades Ring Spacers Flanges, WNRF Flanges, Screwed Flanges, Insert Flanges, flanges bolts, cf flange, Lap Joint Flanges, ASME B16.36 Orifice Flanges, Plate Flange, Expander Flanges, Ring Type Joint Flanges, Loose Flanges, Reducing Flanges, puddle flange, Threaded Flanges, blank flange, vacuum flange.
Connect Type/ Flange Face TypeRing Type Joint (RTJ), Flat Face (FF), Tongue & Groove, Small Male-Female (SMF), Lap-Joint Face (LJF), Raised Face (RF), Large Male-Female (LMF), Small Tongue.
Custom designAs per your drawing
TestDirect-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
OriginIndian / USA / Korean / West Europe / Japan
Pressure ClassPN 6 TO PN 100
ThicknessNormal Pipe Size ≤ 18
Bore DiameterNormal Pipe ≤ 10
High TemperatureAbove 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low TemperatureAbove -29 Degree C (−20°F)
Coating/Surface Treatment:Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard FlangesAvailable
Gaskets TypesFull Face, Metallic Ring, Flat Ring Gasket
Marking Standard
Name of Manufacturer
Schedule
Type of Flange Facing
Pressure Class
Nominal Pipe Size, etc
Test Certificates
EN 10204/3.1B, NACE MR0103, NACE MR0175
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc

Flange Type Available


Equivalent Grade

Material GroupCommon NameTypeUNSForging Spec.Casting Spec. EquivalentDINDIN W. NoApplication
Low ASMoly SteelC-1/2MoK12822A182-F1 cl2A217-WC115M031.5415Up to 470ºC* (875ºF)
AS Chrome Moly1.1/4Cr-1/2MoK11572A182-F11 cl2A217-WC613CRM0441.7335Up to 593ºC (1100ºF)
2.1/4Cr-1MoK21590A182-F22 cl3A217-WC910CRM09101.7380Up to 593ºC (1100ºF), HP steam
5Cr-1/2MoK41545A182-F5/F5aA217-C512CRMO1951.7362High temp refinery service
9Cr-1MoK90941A182-F9A217-C12X 12 CrMo 9 11.7386High temp erosive refinery service
9Cr-1Mo-VA182-F91A217-C12AX 10 CrMoVNb 9 11.4903High pressure steam

Chemical Properties

GradeCarbonManganeseSiliconPhosphorusSulfurChromiumMolybdenum
F10.15 max0.3-0.60.50.030.034-60.44-0.65
F50.15 max0.3-0.60.5-1.00.030.034-60.44-0.65
F90.15 max0.3-0.60.5-1.00.030.038-100.9-1.1
F110.5-0.150.3-0.60.5-1.00.030.031.0-1.50.44-0.65
F120.15 max0.3-0.60.50.030.034-60.44-0.65
F220.50.15 max0.3-0.60.50.030.034-60.44-0.65
F910.15 max0.3-0.60.5-1.00.030.038-100.9-1.1

Mechanical Properties

GradeTensile StrengthYield Strength (0.2%Offset)Elongation
F127548520 %
F527548520 %
F938058520 %
F1120541520 %
F1227548520 %
F2220541520 %
F9138058520 %

ANSI B16.5 AS Flanges Dimensions Class-150

Nominal Pipe Size
NPS
(inches)
Class 150
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-1/241/20.622-3/8
3/43-7/841/20.622-3/4
14-1/441/20.623-1/8
1-1/44-5/841/20.623-1/2
1-1/2541/20.623-7/8
2645/80.754-3/4
2-1/2745/80.755-1/2
37-1/245/80.756
3-1/28-1/285/80.757
4985/80.757-1/2
51083/40.888-1/2
61183/40.889-1/2
813-1/283/40.8811-3/4
1016127/8114-1/4
1219127/8117
14211211.1218-3/4
1623-1/21611.1221-1/4
1825161-1/81.2522-3/4
2027-1/2201-1/81.2525
2432201-1/41.3829-1/2

SASME B16.5 AS Flanges Dimensions Class-300

Nominal Pipe Size
NPS
(inches)
Class 300
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2983/40.887-1/4
41083/40.887-7/8
51183/40.889-1/4
612-1/2123/40.8810-5/8
815127/8113
1017-1/21611.1215-1/4
1220-1/2161-1/81.2517-3/4
1423201-1/81.2520-1/4
1625-1/2201-1/41.3822-1/2
1828241-1/41.3824-3/4
2030-1/2241-1/41.3827
2436241-1/21.6232

SASME B16.5 AS Flanges Dimensions Class-400

Nominal Pipe Size
NPS
(inches)
Class 400
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
41087/817-7/8
51187/819-1/4
612-1/2127/8110-5/8
8151211.1213
1017-1/2161-1/81.2515-1/4
1220-1/2161-1/41.3817-3/4
1423201-1/41.3820-1/4
1625-1/2201-3/81.522-1/2
1828241-3/81.524-3/4
2030-1/2241-1/21.6227
2436241-3/41.8832

SASME B16.5 AS Flanges Dimensions Class-600

Nominal Pipe Size
NPS
(inches)
Class 600
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
410-3/487/818-1/2
513811.1210-1/2
6141211.1211-1/2
816-1/2121-1/81.2513-3/4
1020161-1/41.3817
1222201-1/41.3819-1/4
1423-3/4201-3/81.520-3/4
1627201-1/21.6223-3/4
1829-1/4201-5/81.7525-3/4
2032241-5/81.7528-1/2
2437241-7/8233

SASME B16.5 AS Flanges Dimensions Class-900

Nominal Pipe Size
NPS
(inches)
Class 900
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
39-1/287/817-1/2
411-1/281-1/81.259-1/4
513-3/481-1/41.3811
615121-1/81.2512-1/2
818-1/2121-3/81.515-1/2
1021-1/2161-3/81.518-1/2
1224201-3/81.521
1425-1/4201-1/21.6222
1627-3/4201-5/81.7524-1/2
1831201-7/8227
2033-3/42022.1229-1/2
2441202-1/22.6235-1/2

SASME B16.5 AS Flanges Dimensions Class-1500

Nominal Pipe Size
NPS
(inches)
Class 1500
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
310-1/281-1/81.258
412-1/481-1/41.389-1/2
514-3/481-1/21.6211-1/2
615-1/2121-3/81.512-1/2
819121-5/81.7515-1/2
1023121-7/8219
1226-1/21622.1222-1/2
1429-1/2162-1/42.3825
1632-1/2162-1/22.6227-3/4
1836162-3/42.8830-1/2
2038-3/41633.1232-3/4
2446163-1/23.6239

SASME B16.5 AS Flanges Dimensions Class-2500

Nominal Pipe Size
NPS
(inches)
Class 2500
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/25-1/443/40.883-1/2
3/45-1/243/40.883-3/4
16-1/447/814-1/4
1-1/47-1/4411.125-1/8
1-1/2841-1/81.255-3/4
29-1/4811.126-3/4
2-1/210-1/281-1/81.257-3/4
31281-1/41.389
41481-1/21.6210-3/4
516-1/281-3/41.8812-3/4
619822.1214-1/2
821-3/41222.1217-1/4
1026-1/2122-1/22.6221-1/4
1230122-3/42.8824-3/8

Pressure Class/ Rating

ASME/ANSI B 16.5
Lap Joint Flange, Ring Type Joint Flange, Threaded Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Slip on Flange, Welding Neck Flange.
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47Blind Flange [Series A & B], Welding Neck Flange.
PRESSURE CLASS75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36Slip on Flange, Threaded Flange, Welding Neck Flange.
PRESSURE CLASS300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1
Plate Flange, Welding Neck Flange, Hubbed Slip on Flange, Lapped Pipe End Flange, Loose Plate With Weld Neck Flange, Hubbed Threaded Flange, Blank Flange, Loose Plate Flange.
PRESSURE CLASSPN 2.5 TO PN 40
BS 4504[PART 1]Blank Flange, Loose Plate With Weld On Plate Collar, Welding Neck Flange, Plate Flange, Hubbed Slip-On Hubbed Threaded.
PRESSURE CLASSPN 2.5 TO PN 400
BS 1560 BOSSBlind Flange, Screwed Boss Flange, Welding Neck Flange,Slip-On Flange, Lapped Flange, Socket Welding Flange.
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
BS10Screwed Boss Flange, Plate Slip-On Flange, Slip-On Boss Flange, Blind Flange, Welding Neck Flange.
TABLED, E, F, H
DIN FLANGESDIN 2527, 2632, 2635, 2673, 2566, 2655, 2631, 2627, 2634, 2576, 2636, 2629, 2633, 2573, 2656, 2638, 2637, 2642, 2641, 2628
PRESSURE CLASSPN 6 TO PN 100

Alloy Steel Flange Weight Chart

Nominal pipe diameter in InchOuter Diameter FlangeThicknessDiameter of HubDiameter of Raised FaceLengthThread LengthKGLB
125108.0014.2049.3050.8017.5017.500.81.8
1/21589.0011.2030.2035.1015.7015.700.40.9
1-1/432117.5015.7058.7063.5020.6020.601.22.6
1-1/240127.0017.5065.0073.2022.4022.401.53.3
3/42098.5012.7038.1042.9015.7015.700.71.5
6150279.5025.40192.00215.9039.6039.608.418.5
380190.5023.90108.00127.0030.2030.204.19
2-1/265178.0022.4090.40104.6028.4028.403.78.1
3-1/290216.0023.90122.20139.7031.8031.805.111.2
250152.5019.1077.7091.9025.4025.402.35.1
4100228.5023.90134.90157.2033.3033.305.913
5125254.0023.90163.60185.7036.6036.60715.4
8200343.0028.40246.10269.7044.5044.501328.6
14350533.5035.10400.10412.8057.2057.203986
10250406.5030.20304.80323.9049.3049.301839.5
20500698.5042.90558.80584.2073.2073.2076167
24600813.0047.80663.40692.2082.6082.6097214
16400597.0036.60457.20469.9063.5063.5047103
12300482.5031.80365.30381.0055.6055.602964
18450635.0039.60505.00533.4068.3068.3057126
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Application

  • Food & Beverage
  • Paper Industry
  • Pharmaceutical
  • Hospital Equipment
  • Textiles
  • Dairy
  • Aircraft
  • Chemicals
  • Others Parts in Machinery
Employee

Testing

  • Hydrostatic Test
  • Macro Test
  • Ultra Sonic Test (UT)
  • Micro Test
  • Hardness Test
  • Radiography Test
  • Pitting Resistance Test
  • PMI Testing
  • Mechanical Testing
  • X-ray detector
MARKET

Packing

  • Wooden Boxes
  • Shrink-Wrappedt
  • Carton Boxes
  • Wooden Crates
  • Wooden Pallets
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