Siddhigiri Tubes is a leading provider of premium quality 4130 chromoly tubes, catering to diverse industrial sectors with precision-engineered solutions. Established on the principles of reliability, innovation, and integrity, we have emerged as a trusted name in the field of metallurgy and tubing technologies. With a commitment to excellence, Siddhigiri Tubes continues to redefine industry standards and deliver unmatched products to our valued clients.

The 4130 CHROMOLY TUBING is a versatile and highly sought-after alloy steel, renowned for its exceptional mechanical properties. Manufactured from premium raw materials, our tubing is engineered to meet the rigorous demands of various industries. Recognized for its outstanding strength-to-weight ratio, superior weldability, and excellent formability, this tubing finds extensive application in aerospace, motorsports, and other high-stress environments.

4130 CHROMOLY TUBING KEY FEATURES:

4130 CHROMOLY TUBING
High Strength-to-Weight Ratio
Weldability and Formability
Diverse Range of Sizes
Superior Weldability
Compliance and Certification
Excellent Toughness & Ductility
Good Hardness & Wear Resistance

AISI 4130 CHROMOLY TUBING SIZE IN STOCK

OD X THICK
1/4" OD x 0.035" ( 6.35 MM OD X 0.9 MM )
1/4" OD x 0.04" ( 6.35 MM OD X 1 MM )
1/4" OD x 0.05" ( 6.35 MM OD X 1.25 MM )
1/4" OD x 0.06" ( 6.35 MM OD X 1.5 MM )
1/4" OD x 0.08" ( 6.35 MM OD X 2 MM )
8 MM OD X 0.9 MM
8 MM OD X 1 MM
8 MM OD X 1.25 MM
8 MM OD X 1.5 MM
8 MM OD X 2 MM
3/8" OD x 0.035" ( 9.5 MM OD X 0.9 MM )
3/8" OD x 0.04" ( 9.5 MM OD X 1 MM )
3/8" OD x 0.05" ( 9.5 MM OD X 1.25 MM )
3/8" OD x 0.06" ( 9.5 MM OD X 1.5 MM )
3/8" OD x 0.08" ( 9.5 MM OD X 2 MM )
10 MM OD X 0.9 MM
10 MM OD X 1 MM
10 MM OD X 1.25 MM
10 MM OD X 1.5 MM
10 MM OD X 2 MM
1/2" OD x 0.035" ( 12.7 MM OD X 0.9 MM )
1/2" OD x 0.04" ( 12.7 MM OD X 1 MM )
1/2" OD x 0.05" ( 12.7 MM OD X 1.25 MM )
1/2" OD x 0.06" ( 12.7 MM OD X 1.5 MM )
1/2" OD x 0.08" ( 12.7 MM OD X 2 MM )
5/8" OD x 0.035" ( 15.88 MM OD X 0.9 MM )
5/8" OD x 0.04" ( 15.88 MM OD X 1 MM )
5/8" OD x 0.05" ( 15.88 MM OD X 1.25 MM )
5/8" OD x 0.06" ( 15.88 MM OD X 1.5 MM )
5/8" OD x 0.08" ( 15.88 MM OD X 2 MM )
16 MM OD X 0.9 MM
16 MM OD X 1 MM
16 MM OD X 1.25 MM
16 MM OD X 1.5 MM
16 MM OD X 2 MM
18 MM OD X 0.9 MM
18 MM OD X 1 MM
18 MM OD X 1.25 MM
18 MM OD X 1.5 MM
18 MM OD X 2 MM
3/4" OD x 0.035" ( 19.05 MM OD X 0.9 MM )
3/4" OD x 0.04" ( 19.05 MM OD X 1 MM )
3/4" OD x 0.05" ( 19.05 MM OD X 1.25 MM )
3/4" OD x 0.06" ( 19.05 MM OD X 1.5 MM )
3/4" OD x 0.08" ( 19.05 MM OD X 2 MM )
7/8" OD x 0.035" ( 22.2 MM OD X 0.9 MM )
7/8" OD x 0.04" ( 22.2 MM OD X 1 MM )
7/8" OD x 0.05" ( 22.2 MM OD X 1.25 MM )
7/8" OD x 0.06" ( 22.2 MM OD X 1.5 MM )
7/8" OD x 0.08" ( 22.2 MM OD X 2 MM )
1" OD x 0.035" ( 25.4 MM OD X 0.9 MM )
1" OD x 0.04" ( 25.4 MM OD X 1 MM )
1" OD x 0.05" ( 25.4 MM OD X 1.25 MM )
1" OD x 0.06" ( 25.4 MM OD X 1.5 MM )
1" OD x 0.08" ( 25.4 MM OD X 2 MM )
1" OD x 0.095" ( 25.4 MM OD X 2.5 MM )
1" OD x 0.12" ( 25.4 MM OD X 3 MM )
1.1" OD x 0.035" ( 28.2 MM OD X 0.9 MM )
1.1" OD x 0.04" ( 28.2 MM OD X 1 MM )
1.1" OD x 0.05" ( 28.2 MM OD X 1.25 MM )
1.1" OD x 0.06" ( 28.2 MM OD X 1.5 MM )
1.1" OD x 0.08" ( 28.2 MM OD X 2 MM )
1.1" OD x 0.095" ( 28.2 MM OD X 2.5 MM )
1.1" OD x 0.12" ( 28.2 MM OD X 3 MM )
1.15" OD x 0.035" ( 29.2 MM OD X 0.9 MM )
1.15" OD x 0.04" ( 29.2 MM OD X 1 MM )
1.15" OD x 0.05" ( 29.2 MM OD X 1.25 MM )
1.15" OD x 0.06" ( 29.2 MM OD X 1.5 MM )
1.15" OD x 0.08" ( 29.2 MM OD X 2 MM )
1.15" OD x 0.095" ( 29.2 MM OD X 2.5 MM )
1.15" OD x 0.12" ( 29.2 MM OD X 3 MM )
1.25" OD x 0.035" ( 31.75 MM OD X 0.9 MM )
1.25" OD x 0.04" ( 31.75 MM OD X 1 MM )
1.25" OD x 0.05" ( 31.75 MM OD X 1.25 MM )
1.25" OD x 0.06" ( 31.75 MM OD X 1.5 MM )
1.25" OD x 0.08" ( 31.75 MM OD X 2 MM )
1.25" OD x 0.095" ( 31.75 MM OD X 2.5 MM )
1.25" OD x 0.12" ( 31.75 MM OD X 3 MM )
1.5" OD x 0.035" ( 38.1 MM OD X 0.9 MM )
1.5" OD x 0.04" ( 38.1 MM OD X 1 MM )
1.5" OD x 0.05" ( 38.1 MM OD X 1.25 MM )
1.5" OD x 0.06" ( 38.1 MM OD X 1.5 MM )
1.5" OD x 0.08" ( 38.1 MM OD X 2 MM )
1.5" OD x 0.095" ( 38.1 MM OD X 2.5 MM )
1.5" OD x 0.12" ( 38.1 MM OD X 3 MM )
1.75" OD x 0.035" ( 44.5 MM OD X 0.9 MM )
1.75" OD x 0.04" ( 44.5 MM OD X 1 MM )
1.75" OD x 0.05" ( 44.5 MM OD X 1.25 MM )
1.75" OD x 0.06" ( 44.5 MM OD X 1.5 MM )
1.75" OD x 0.08" ( 44.5 MM OD X 2 MM )
1.75" OD x 0.095" ( 44.5 MM OD X 2.5 MM )
1.750" OD x 0.12" ( 44.5 MM OD X 3 MM )
2" OD x 0.035" ( 50.8 MM OD X 0.9 MM )
2" OD x 0.04" ( 50.8 MM OD X 1 MM )
2" OD x 0.05" ( 50.8 MM OD X 1.25 MM )
2" OD x 0.06" ( 50.8 MM OD X 1.5 MM )
2" OD x 0.08" ( 50.8 MM OD X 2 MM )
2" OD x 0.095" ( 50.8 MM OD X 2.5 MM )
2" OD x 0.12" ( 50.8 MM OD X 3 MM )

4130 CHROMOLY TUBES PRESSURE RATINGS

OD inchesAve. Wall inchesMin Yield Strength (PSI)Min Tensile Strength (PSI)Theoretical Burst Pressure * (PSI)Working Pressure (PSI) 25% of BurstTheoretical Yield Point ** (PSI)Collapse Pressure *** (PSI)
0.2500.02030,00075,00014,2863,5715,7144,416
0.250.02830,00075,00021,6495,4128,6605,967
0.2500.03530,00075,00029,1677,29211,6677,224
0.2500.04930,00075,00048,35512,08919,3429,455
0.2500.06530,00075,00081,25020,31332,50011,544
0.3750.02030,00075,0008,9552,2393,5823,029
0.3750.02830,00075,00013,1663,2925,2664,145
0.3750.03530,00075,00017,2134,3036,8855,077
0.3750.04930,00075,00026,5346,63410,6146,816
0.3750.06530,00075,00039,7969,94915,9188,597
0.5000.02030,00075,0006,5221,6302,6092,201
0.5000.02830,00075,0009,4592,3653,7843,172
0.5000.03530,00075,00012,2093,0524,8843,906
0.5000.04930,00075,00018,2844,5717,3135,201
0.5000.06530,00075,00026,3516,58810,5416,786
0.5000.08330,00075,00037,2759,31914,9108,307
0.6250.02030,00075,0005,1281,2822,0511,859
0.6250.02830,00075,0007,3811,8452,9532,568
0.6250.03530,00075,0009,4592,3653,7843,172
0.6250.04930,00075,00013,9473,4875,5794,335
0.6250.06530,00075,00019,6974,9247,8795,591
0.6250.08330,00075,00027,1246,78110,8506,910
0.6250.09530,00075,00032,7598,19013,1037,734
0.6250.10930,00075,00040,17210,04316,0698,639
0.7500.02830,00075,0006,0521,5132,4212,156
0.7500.03530,00075,0007,7211,9303,0882,669
0.7500.04930,00075,00011,2732,8184,5093,664
0.7500.06530,00075,00015,7263,9316,2904,749
0.7500.08330,00075,00021,3185,3308,5275,905
0.7500.09530,00075,00025,4466,36210,1796,637
0.7500.10930,00075,00030,7337,68312,2937,453
0.7500.12030,00075,00035,2948,82414,1188,064
0.8750.02030,00075,0003,5938981,4371,340
0.8750.02830,00075,0005,1281,2822,0511,859
0.8750.03530,00075,0006,5221,6302,6092,201
0.8750.04930,00075,0009,4592,3653,7843,172
0.8750.06530,00075,00013,0873,2725,2354,126
0.8750.08330,00075,00017,5604,3907,0245,152
0.8750.09530,00075,00020,8035,2018,3215,807
0.8750.10930,00075,00024,8866,2219,9546,543
0.8750.12030,00075,00028,3467,08711,3397,100
1.0000.02830,00075,0004,4491,1121,7801,633
1.0000.03530,00075,0005,6451,4112,2582,027
1.0000.04930,00075,0008,1492,0373,2592,796
1.0000.06530,00075,00011,2072,8024,4833,647
1.0000.08330,00075,00014,9283,7325,9714,567
1.0000.09530,00075,00017,5934,3987,0375,159
1.0000.10930,00075,00020,9085,2278,3635,827
1.0000.12030,00075,00023,6845,9219,4746,336
1.0000.13430,00075,00027,4596,86510,9846,963
1.2500.03530,00075,0004,4491,1121,7801,633
1.2500.04930,00075,0006,3801,5952,5522,260
1.2500.06530,00075,0008,7052,1763,4822,958
1.2500.08330,00075,00011,4852,8714,5943,719
1.2500.09530,00075,00013,4433,3615,3774,213
1.2500.10930,00075,00015,8433,9616,3374,776
1.2500.12030,00075,00017,8224,4557,1295,207
1.2500.13430,00075,00020,4685,1178,1875,742
1.5000.03530,00075,0003,6719181,4691,367
1.5000.04930,00075,0005,2431,3112,0971,896
1.5000.06530,00075,0007,1171,7792,8472,487
1.5000.08330,00075,0009,3332,3333,7333,136
1.5000.09530,00075,00010,8782,7194,3513,559
1.5000.10930,00075,00012,7543,1885,1014,043
1.5000.12030,00075,00014,2863,5715,7144,416
1.5000.13430,00075,00016,3154,0796,5264,881
1.5000.14830,00075,00018,4394,6107,3755,336
1.7500.03530,00075,0003,1257811,2501,176
1.7500.04930,00075,0003,8649661,5461,434
1.7500.06530,00075,0006,0191,5052,4072,146
1.7500.08330,00075,0007,8601,9653,1442,711
1.7500.09530,00075,0009,1352,2843,6543,080
1.7500.10930,00075,00010,6722,6684,2133,504
1.7500.12030,00075,00011,9212,9804,7683,832
1.7500.13430,00075,00013,5633,3915,4254,242
1.7500.14830,00075,00015,2683,8176,1074,645
1.7500.16530,00075,00017,4304,3576,9725,124
2.0000.03530,00075,0002,7206801,0881,032
2.0000.04930,00075,0003,8649661,5461,434
2.0000.06530,00075,0005,2141,3032,0861,887
2.0000.08330,00075,0006,7881,6972,7152,387
2.0000.09530,00075,0007,8731,9683,1492,715
2.0000.10930,00075,0009,1752,2943,6703,092
2.0000.12030,00075,00010,2272,5574,0913,384
2.0000.13430,00075,00011,6052,9014,6423,751
2.0000.14830,00075,00013,0283,2575,2114,111
2.0000.16530,00075,00014,8203,7055,9284,542

4130 CHROMOLY TUBING MECHANICAL PROPERTIES

Properties Metric Imperial
Tensile strength, ultimate 560 MPa 81200 psi
Tensile strength, yield 460 MPa 66700 psi
Modulus of elasticity 190-210 GPa 27557-30458 ksi
Bulk modulus (Typical for steel) 140 GPa 20300 ksi
Shear modulus (Typical for steel) 80 GPa 11600 ksi
Poissons ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 21.50% 21.50%
Reduction of area 59.6 59.60%
Hardness, Brinell 217 217
Hardness, Knoop (Converted from Brinell hardness) 240 240
Hardness, Rockwell B (Converted from Brinell hardness) 95 95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) 17 17
Hardness, Vickers (Converted from Brinell hardness) 228 228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) 70 70

4130 CHROMOLY TUBING DIAMETER TOLERANCES

NPS [DN] Designator Over Under
in. mm in. mm
1/8 to 1 1/2 [6 to 40], incl. 1/64 (0.015) 0.40 1/64 (0.015) 0.40
Over 1 1/2 to 4 [40 to 100], incl. 1/32 (0.031) 0.79 1/32 (0.031) 0.79
Over 4 to 8 [100 to 200], incl. 1/16 (0.062) 1.59 1/32 (0.031) 0.79
Over 8 to 12 [200 to 300], incl. 3/32 (0.093) 2.38 1/32 (0.031) 0.79
Over 12 [300] +/- 1% of the specified outside diameter

4130 CHROMOLY TUBING CHEMICAL COMPOSITIONS

Element Content (%)
Iron, Fe 97.03 – 98.22
Chromium, Cr 0.80 – 1.10
Manganese, Mn 0.40 – 0.60
Carbon, C 0.280 – 0.330
Silicon, Si 0.15 – 0.30
Molybdenum, Mo 0.15 – 0.25
Sulfur, S 0.040
Phosphorous, P 0.035

4130 CHROMOLY TUBING PHYSICAL PROPERTIES

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³
Melting point 1432°C 2610°F

AISI 4130 TUBING DIMENSIONS CHART

O.D.(mm) x Thickness(mm) O.D(mm) x Thickness(mm) O.D(mm) x Thickness(mm)
38.1 x 3.2 57.0 x 4.9 76.2 x 4.0
38.1 x 4.0 57.0 x 6.3 76.2 x 5.0
38.1 x 6.3 57.0 x 7.9 76.2 x 6.3
42.4 x 3.2 60.3 x 3.2 82.5 x 4.5
42.4 x 4.0 60.3 x 3.6 88.9 x 3.2
44.5 x 3.2 60.3 x 5.0 88.9 x 3.6
44.5 x 6.3 63.5 x 3.2 88.9 x 4.0
48.3 x 3.2 63.5 x 3.6 101.6 x 3.6
48.3 x 3.6 63.5 x 4.0 101.6 x 4.5
50.8 x 4.5 63.5 x 6.3 101.6 x 6.3
51.0 x 3.2 63.5 x 7.9 114.3 x 3.6
51.0 x 3.6 70.0 x 3.2 114.3 x 5.0
51.0 x 6.3 70.0 x 3.6 139.7 x 4.0
57.0 x 3.2 70.0 x 6.3 139.7 x 5.0
57.0 x 3.6 76.2 x 3.6 139.7 x 6.3

AISI 4130 TUBING NB SIZE SCHEDULE CHART

Available Stock Of 4130 Chromoly Tubing

UNS G41300 Tubes Supplier

AISI 4130 Chromoly Exhaust Tube Suppliers

BS 970 Chromium Molybdenum Condenser Tube

4130 Aerospace Tubing Supplier

ASTM A519 Grade 4130 Capillary Tubing

large diameter ASTM A519 Grade 4130 Tubes

AISI 4130 Chromoly Square Tube

6 Inch AISI 4130 Chromoly Tubes

Schedule 40 AISI 4130 Chromoly Polish Tube

Schedule 80 SS AISI 4130 Tube Per Foot

AISI 4130 Chromoly Coil Tube

AISI 4130 Chromoly Schedule 80 Perforated Tubes

Schedule 10 AISI 4130 Chromoly Tubing

SS AISI 4130 Mechanical Tube Supplier

6 Inch AISI 4130 Chromoly Rectangular Tube

AISI 4130 Chromoly U Shaped Tubes

AISI 4130 Chromoly Nuclear Tubes

6 Inch AISI 4130 Chromoly Tubes

ASTM A519 Grade 4130 Square Tubing

WNR. 1.7218 Electropolished Tubes

EN 25CrMo4 Instrumentation Tube

1/2″ NB in Thickness SS AISI 4130 Tubes

JIS G4105 High Pressure Tube

AISI 4130 Chromoly Instrumentation Tubes

Schedule 80 AISI 4130 Chromoly Tubes

AISI 4130 Chromoly Round Tube

ASTM A519 Grade 4130 Tubing

Schedule 10 SS AISI 4130 Heat Resistant Tubing

EN 25CrMo4 Bellows Tubes

ASTM A519 Grade 4130 Exhaust Tube Supplier

AISI 4130 Chromoly Sanitary Tube

SS DIN 1.7218 Round Tubing

custom Chromium Molybdenum Tubing

14″ NB in Thickness Schedule ASTM A519 Grade 4130 Tube

SS AISI 4130 Needle Tube

AISI 4130 Chromoly Oval Tubes Supplier

2 Inch ASTM A519 Grade 4130 Finned Tube

JIS G4105 Chromoly Thin Wall Tubing

EN 25CrMo4 Seamless Manufacturer in India

AISI 4130 Chromoly Pressure Tubing

AISI 4130 Chromoly Tube Schedule 80

AISI 4130 Chromoly Oval Tube Supplier

AISI 4130 Chromoly Tubes Supplier

ASTM A519 Grade 4130 Aircraft Tubing

SS AISI 4130 Tubing Supplier

4130 Chassis Tube Racing Cars

AISI 4130 Chromoly Hot Finished Seamless Tubing

AISI 4130 Chromoly Tube Supplier in Mumbai

AISI 4130 Chromoly Pressure Tubing

AISI 4130 Chromoly Boiler Tube

Schedule 40 AISI 4130 Chromoly Tubes Supplier

AISI 4130 Chromoly exhaust Tubes suppliers

Marine Grade AISI 4130 Chromoly Tube

6 Inch ASTM A519 Grade 4130 Exhaust Tubing

AISI 4130 Chromoly Electropolished Tube

Chromium Molybdenum Seamless Tubing

Stainless Steel U Tube

5″ NB in Thickness Schedule SS AISI 4130 Tube

ASTM A519 Grade 4130 Seamless Tubes supplier

Schedule 40 SS AISI 4130 Cold drawn Seamless Tubing

SS AISI 4130 Rectangular Tubes

AISI 4130 Chromoly Hollow Tube Exporter

ASTM A519 Grade 4130 Radiant Tube

AISI 4130 Chromoly Precision Tubing Suppliers

High Quality ASTM A519 Grade 4130 Seamless Tube

16″ NB in Thickness AISI 4130 Chromoly Tube

AISI 4130 Chromoly Aircraft Tubing

SS AISI 4130 Hollow Tube Supplier

Aircraft Spruce 4130 Tubing Supplier

Alloy 4130 Stainless Steel Tubes Boiler

Cold Rolled ASTM A519 Grade 4130 Tube Suppliers

4130 Chromium Molybdenum SCH 40 Welded Tube

UNS G41300 Ornamental Tube

Alloy 4130 Stainless Steel Capillary Tubes

DIN. 1.7218 Tubing

AISI 4130 Chromoly Tube Schedule 80 Supplier

AISI 4130 Chromoly Decorative Tube

EN 25CrMo4 Chromoly Capillary Tube

Schedule 10 ASTM A519 Grade 4130 Hollow Tubes

AISI 4130 Chromoly Secondary & Surplus Tube

ASTM A519 Grade 4130 Small Diameter Tubes

AISI 4130 Chromoly Capillary Tube Supplier

4″ NB in Thickness Schedule SS AISI 4130 Tube Supplier

UNS G41300 Seamless Tubes

Alloy 4130 SS SCH 80 Tube

AISI 4130 Chromoly Hollow Tube

AISI 4130 Chromoly Perforated Tube

WERKSTOFF NR. 1.7218 Condensers Tubes

ASTM A519 Grade 4130 Precision Tubing Suppliers

18″ NB in Thickness Schedule SS AISI 4130 Tube

AISI 4130 Chromoly Round Tubes suppliers

Alloy 4130 Stainless Steel Rectangular Tube

6″ NB in Thickness AISI 4130 Chromoly Tube Supplier

ASTM A519 Grade 4130 Capillary Tubes

AISI 4130 Chromoly Mechanical Tube

WERKSTOFF NR. 1.7218 Capillary Tubes

AISI 4130 Chromoly Elliptical Tube

SS AISI 4130 Round Tubes Supplier & Manufacturer

4130 Roll Cage Tubing Supplier

Chromium Molybdenum 4130 Hydraulic Tubes

NB Size OD 40S 5S 10S S10 S20 S40 S60 XS/80S S80 S100 S120 S140 S160 XXS
1/8”10.291.21.732.41
1/4”13.721.72.243.02
3/8”17.151.72.313.2
151/2”21.342.81.72.12.773.733.734.787.47
203/4”26.672.91.72.12.873.913.915.567.82
251”33.43.41.72.83.384.554.556.359.09
321 1/4”42.163.61.72.83.564.854.856.359.7
401 1/2”48.263.71.72.83.685.085.087.1410.2
502”60.333.91.72.83.915.545.549.7411.1