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ASTM T4 Details

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T4 Application:High-Speed Tool Steel

Category Type Grade Designations
Grades Tool Die Steels T4 USA - ASTM ,

Chemical composition(wt.%) of T4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.70 0.80
Si 0.20 0.40
Mn 0.10 0.40
P - 0.030
S - 0.030
Cr 3.75 4.50
Mo 0.40 1.00
V 0.80 1.20
W 17.50 19.00
Co 4.25 5.75
High-Speed Tool Steel

Mechanical properties of grade T4

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
567 (≥) 535 (≥) 11 22 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical properties of grade T4

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
192 (≥) 892 (≥) 43 14 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 114
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
475 177 755

T4 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
A 268 S44300 SAE USA
Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
S44300 AISI USA
Ferritic Chromium Copper Heat Resisting Steel
SA-1008 BHS Grade 44[300] AMS USA
Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy With Improved Formability
SA-1008 SHS Grade 44[300] AMS USA
Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy With Improved Formability
SA-268 S44300 AMS USA
Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
T41901 UNS USA
Shock-Resisting Tool Steel
T41902 UNS USA
Shock-Resisting Tool Steel
T41904 UNS USA
Shock-Resisting Tool Steel
T41905 UNS USA
Shock-Resisting Tool Steel
T41906 UNS USA
Shock-Resisting Tool Steel
T41907 UNS USA
Shock-Resisting Tool Steel
T4 ASTM USA
High-Speed Tool Steel
Stellite T40 Whole Whole
Stellite alloy

Relevant products

T4 Steel Stock

Steel grade Dimension Shape Unit Quantity Delivery state Query
T45Cr5Si3 Round Bar Dia.40mm Round Bar Kgs 500 Hot-Rolled+Annealed+black Enquiry
1.2714 Hot-Work Mould Steel Flat Bar Stock(2019-09-03) Select 0 Select Enquiry
1.2714 Stock list 2020-06-15 Select 0 Select Enquiry
1.2714 QT Bar Stock List 2020-06-15 Select 0 Select Enquiry

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