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ASTM 5140

Data Table for: Steel Grades : Stainless Steel : ASTM 5140

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

  • Quantity
  • Value
  • Unit
  • Young's modulus
  • Tensile strength
  • Elongation
  • Fatigue
  • Yield strength
  • 200000 - 200000
  • 650 - 880
  • 8 - 25
  • 275 - 275
  • 350 - 550
  • MPa
  • MPa
  • %
  • MPa
  • MPa

Physical Properties

  • Quantity
  • Value
  • Unit
  • Thermal expansion
  • Thermal conductivity
  • Specific heat
  • Melting temperature
  • Density
  • Resistivity
  • 10 - 10
  • 25 - 25
  • 460 - 460
  • 1450 - 1510
  • 7700 - 7700
  • 0.55 - 0.55
  • e-6/K
  • W/m.K
  • J/kg.K
  • °C
  • kg/m3
  • Ohm.mm2/m

Heat Treatment:





Q & T

Can produce ASTM 5140 specifications and size

  • Steel grade
  • Specification
  • Processing range(mm)
  • ASTM 5140
  • ASTM 5140
  • ASTM 5140
  • ASTM 5140
  • ASTM 5140
  • ASTM 5140
  • Φ1 to Φ2000
  • 10 to 1000
  • 0.08 to 800(T)*10 to 1500(W)*Long
  • Pipe/tube/slugs/donuts/cubes/other shapes
  • OD: Φ4-410; WT: 1-35 mm
  • THK:0.1mm Width:1500mm


Alloy steels: 5140 standards: ASTM A29 / A29M-04 \"characteristics and application: ASTM5140 is the most commonly used alloy steels, tensile strength, yield strength and its quench-hardening ability are better than no. 40 steel is high, but the weldability Co., LTD, have formed the tendency of crack. ASTM5140 used for more important conditioning parts, such as alternating load of parts, medium speed work and medium load parts. ASTM5140 hardening to load and high wear resistance and very big impact, and no parts, such as gear, sleeve, shaft, crankshaft, pins.

"Mechanical properties: tensile strength σ b (MPa) : frequency 980 (100) the yield strength σ s (MPa) : 785 (80) at the frequency δ 5 (%) : quartile 9 area reduction ψ (%) : quartile 45 impact energy Akv (J) : 47 quartile impact toughness values α kv (J/cm2) : 59 quartile (6) hardness: more than 207 HB sample size: sample blank dimensions for 25 mm standard and metallographic organization" heat treatment, heat treatment specification: quenching 850 ℃, the oil cold; Tempering 520 ℃, water, oil, and cold. "Delivery status: to heat treatment (is fire, annealed or high temperature tempering) or not heat treatment state delivery, delivery status should be indicated in the contract.

Editor this period of characteristics

5140 in carbon steel is a steel, cold heading steel mold. The steel prices moderate, easy processing, the proper heat treatment later can gain some toughness, plastic and wear resistance. Is the fire can promote organization nodularity, improve hardness of less than 160 HBS blank the cutting performance. In 550 ~ 570 ℃ temperature follows, this steel has the best comprehensive mechanical properties. The steel its quench-hardening ability is high, suitable for high frequency quenching, surface hardening process such as flame hardening, etc.

Editor this period of application

After the conditioning is used in the manufacturing of the medium under load and medium speed work mechanical parts, such as car's steering knuckle and after half shaft and machine gear wheel, shaft, worm, spline shaft, top set, etc.; The quenching and tempering used in the manufacture of temperature after under high load, impact and medium speed work parts, such as gear, spindle, oil pump rotor, slider, set of ring, etc.; The low temperature quenching and tempering after under heavy load, used in the manufacture of low impact and abrasion resistance, and section with the entity in 25 mm thickness of the following parts, such as the worm, spindle, axle, set of ring, etc.; After the tempering and high frequency surface hardening used in the manufacture of high surface hardness and wear resistance and no impact parts, such as gear, sleeve, axle, spindle, crankshaft, mandrels, pins, connecting rod, screw, nut, intake valve, etc. In addition, the steel and is suitable for the manufacture of seepage of carbon and nitrogen treatment of transmission parts, such as larger diameter and low temperature toughness good gear and axis. Elastic modulus elastic modulus E (20 ℃) / MPa 200000 ~ 211700, shear modulus G (20 ℃) 80800 850 ℃ quenching heat treatment, oil cold; Tempering 520 ℃, water, oil, and cold. 40 Cr hardening hardness of HRC52-60, flame hardening can achieve HRC48-55. Nitriding process 5140 steel are nitriding steel that contains the elements to nitration. 5140 after nitriding process can obtain higher surface hardness. 5140 after the tempering nitriding process can reach the highest hardness HRA72 ~ 78, namely HRC43 ~ 55. Nitrogen chemical a process route: forging-annealing-rough machining-conditioning-precision machined-except stress-coarse grinding-nitriding-fine grinding or grind. Because nitriding thin and brittle, so to a higher intensity heart department organization, so want to go to the conditioning heat treatment, get the tempering saxhlet body, improve mechanical properties of heart and nitriding quality. Tufftriding is active nitriding, now more commonly used is gas nitriding. Welding 5140, in order to prevent the matrix for heat, causing seam internal quench quenching crack. After soldering conditioning before had better add again is fire. Crystallization in easy segregation, the perspective of crack (a kind of hot crack) is more sensitive, easy arc welding in pit and in welding seams of concave cracking. Carbon content is higher, the fast cooling to easily get cold crack sensitive hardened organization (martensite organization). Content in the cold speed is bigger, very easy to form hard brittle high carbon martensite and make embrittlement of content.

Editor this period of welding process

1, general in annealing (is fire) state welding. 2, welding method is not restricted 3, with larger line energy, an appropriate increase in temperature, general temperature and temperature between layers can be controlled in 250 ~ 300 ℃ between. 4, welding materials should guarantee the deposited metal melting the composition and mother material basic same, such as J107-Cr 5, welding shall be promptly after conditioning heat treatment. If the quenching and tempering treatment in time have difficulty, can be in the middle of annealed or in the preheated temperature higher than the heat preservation period of time, to rule out diffusion hydrogen and soften the organization. To structure is complex, weld more products, can be in after a certain number of welding seam, a middle annealing.

 We can produce the ASTM 5140 has the following specifications:

Round bar steel: 1mm to 3000mm

Square-shape steel: 1mm to 2000mm

Plate steel:0.1mm to 2500mm

Width: 10mm to 2500mm

Lenth: We can supply any lenth based on the customer's requirement.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Tubings: OD: φ3-1800 mm, with wall thickness ranging from 0.3-120 mm.

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.

We serve you with our honesty, integrity, and professionality.

Chemical composition % of the ladle analysis of grade ASTM 5140 and Standards



C Si Mn Cr Ni P S CU
  0.37~0.44 0.17~0.37 0.50~0.80 0.80~1.10 ≤0.030 ≤0.035 ≤0.035 ≤0.030


Sample blank dimensions(mm):25


Heat treatment:


The first quench heating temperature (850 ℃) :; Cooling agent: oil


The second quench heating temperature (℃) :-

Tempering heating temperature (520 ℃) :; Cooling agent: water, oil

Tensile strength (sigma b/MPa) : ≧ 980

The yield point (sigma s/MPa) : ≧ 785

Elongation (delta 5 / epigastric %) : ≧ 9

Section shrinkage rate (%) : ψ / ≧ 45

Impact absorption power (Aku2 / J) : ≧ 47

Brinell hardness (HBS100/3000) (annealing or high temperature tempering  state) : ≦ 207

Company Instoduction:Sichuan Changcheng Special Steel Limited Liability
Company of Pan Steel Group(hereinafter referred to as PCSSC) Iocates in Jiangyou City,Sichuan Province,which former name is Changcheng Steel
Factory of Metallurgical Industry.It's built up in the year of 1965 and put into production in 1972.PCSSC has become one of the large core enterprises in Sichuan province and the important research and manufacture
base for special steel of China.In 1994,Changcheng special Steel Corporation ,the shareholding subsidiary of PCSSC has been listed on Shenzhen Stock Exchange.On June,2004,Pan steel Group reformed Changcheng Special Steel Company formally,and formed Sichuan Changcheng Special Steel
Limited Liability Company of Pan Steel Group.
At present,PCSSC has the annual production capacity to turn out 650,000
tons of special steel and 700,000 tons of finished steel products.It can supply users with 12 kinds of qualitative special steel and metal products
more than 350 grades,over 5000 dimensions on the international or national standard.The products can be widely used in all aspects of aviation,aerospace,shipbuilding,military industry,nuclear power and transportation,machine,petrochemical,medical instruments and so on.And sold to all of the country and exported into USA,Europe and Southeast Asia,etc.Some 34 products have awarded the title of the
National,Ministerial and Provincial level high-quality products.Also,product quality as cold-work mould steel has reached international level.After more than forty years development,PCSSC has grwn
into the important national special steel research and production base and military industry supporting enterprise and become irreplaceable imporyant force in the domains of national defense industry,aviation,aerospace,navigation and nuclear power.
Thereto,top-end products as titanium products and nuclear power tubes have strong market competitions and formed a new economic grow point.PCSSC is one of the three main military products and super alloyed steel production bases of China,which is on a par with the Northeast Special Steel and Special Steel of Bao Steel.It makes great contribution to insist
on self reliance,speed up national befense modern construction,to enhance our capability of independent innovation and insist on self-development to push forward nationalizing major equipment construction.
PCSSC insists the operation policy of pursuing special,holds the philossophy of "I have what you haven't,I expertise what you have",and adhere to the "science and technology enterprises,human resources enterpises,independent creation"idea,and insist on the operation principle"people oriented".The company has gradually formed a corporate identity which is "superior production technology,self-contained specialized equipment,strong technology research and development,high technology content",and realized the strategic objectives to build PCSSC as a maijr military manufacturing base,the domestic first-class Titanium steel bounded type fine steel bases and nuclear power production base.

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