Tool and Die Steel S7 Bars

Nestled in the industrial heart of Safat, Kuwait, Nimish Metal has built its reputation on a foundation of reliability and precision. We specialize in providing top-tier materials for demanding industries, and our selection of Tool and Die Steel S7 bars is a testament to this commitment. Recognized for its exceptional shock resistance, this grade is a trusted choice for professionals who cannot afford compromise, offering the resilience needed to tackle the most challenging applications with confidence and durability.

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Die Steel S7 Rods

S7 Tool Steel Round Bar

S7 Tool and Die Steel Bar

What is Tool and Die Steel S7 Bars?

The strength of S7 steel comes from its specific composition and resulting properties. It is a chromium-based alloy known for its high carbon and molybdenum content, which contributes to its remarkable toughness. After proper heat treatment, S7 achieves an outstanding balance, offering high impact resistance while maintaining good hardness and dimensional stability. This unique combination means tools made from S7 can absorb significant shock without chipping or cracking, even under severe stress.

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Tool and Die Steel S7 Bars Specifications

Standard : ASTM A681, ASME SA681
Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
Form : Round
Diameter : 10 mm ~ 900 mm
Size : 0.08 mm to 25.00 mm
Diameter Range : 0.040 mm – 12 mm (0.0016” – 0.4724”)
Application : Lathe Tools, Milling Cutter, Cutter Blades, Boring Tools, Twist drills, Milling Knives, Reamers, Taps, Metalcutting saws, Screw Cutting Tools, File Cutter’s Chissels, Drills, Hobs, Drill Bits, Tread cutting tools etc

Chemical Compositions of Tool and Die Steel S7 Bars

ASTM A681-2008	C		Si		Mn		P	S	Cr		V		Mo
S7/T41907	0.45	0.55	0.20	1.00	0.20	0.90	0.03	0.03	3.00	3.50	–	0.35	1.30	1.80
DIN ISO 4957	C		Si		Mn		P	S	Cr		V		Mo
1.2355/50CrMoV13-15	0.45	0.55	0.20	0.80	0.50	0.90	0.03	0.02	3.00	3.50	0.15	0.35	1.30	1.70

Mechanical Properties of Tool and Die Steel S7 Bars

Properties	Metric
Hardness, Rockwell C (air cooled from 941°C, 649°C temper temperature)	41
Hardness, Rockwell C (air cooled from 941°C, 449°C temper temperature)	53
Hardness, Rockwell C (air cooled from 941°C, 149°C temper temperature)	57
Modulus of elasticity	207 GPa
Charpy impact (V-notch; air cooled from 941°C; 425°C temper temperature)	13.6 J
Charpy impact (V-notch; air cooled from 941°C; 649°C temper temperature)	16.3 J
Charpy impact (V-notch; air cooled from 941°C; 200°C temper temperature)	16.9 J
Machinability (1% carbon steel)	70.0 – 75.0%
Poisson’s ratio	0.27-0.30

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Equivalent Grades of Tool and Die Steel S7 Bars

Country	USA	German
Standard	ASTM A681	DIN EN ISO 4957
Grades	S7/T41907	1.2355/50CrMoV13-15

Thermal Properties of Tool and Die Steel S7 Bars

Properties		Conditions
Properties		T (°C)	Treatment
Thermal expansion	12.6 x 10^-6/ºC	20-200	–

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Tool and Die Steel S7 Bars Types

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Frequently Asked Questions (FAQ)

What Is The Standard Annealing Temperature For Tool and Die Steel S7 Bars?

The standard annealing temperature for Tool and Die Steel S7 bars is typically around 1,600°F to 1,650°F (871°C to 899°C), followed by slow cooling to relieve internal stresses.

Are Tool And Die Steel S7 Bars Available In Custom Lengths Or Shapes?

Yes, Tool and Die Steel S7 bars are available in custom lengths and shapes, often tailored to specific customer requirements, ensuring versatility for various tooling and die applications.

How Should Tool and Die Steel S7 Bars Be Stored?

Tool and Die Steel S7 bars should be stored in a dry, clean environment, ideally on elevated racks to prevent rust or contamination. They should be kept away from moisture and corrosive substances.

Tool and Die Steel S7 Bars Uses

This makes S7 the go-to material for a wide range of critical applications. It is ideally suited for manufacturing chisels, punches, and shear blades where shock loading is a constant factor. Furthermore, it excels in die casting dies, forging dies, and structural parts for machinery that endure heavy impact. Essentially, any tool or component that must withstand brutal force without failing will benefit from the unparalleled toughness and reliability of S7 steel bars from Nimish Metal.

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