Search

High Speed Steel M42 for Broach

High speed steel M42 with 8% cobalt,so HSS M42 with superior hot hardness for making high quality broach。M42 tool steel is more durable than M35 and M2 tool steel,also with excellent performance for cutting tools。。。。

Send Inquiry

FEATURES: M42 high speed steel is a premium cobalt high speed steel with a chemical composition designed for high hardness and superior hot hardness. These properties make the steel an excellent choice for machining high-strength and pre-hardened steels, high-hardness alloys, and the difficult-to-machine, nonferrous super alloys used in the aerospace, oil, and power generation industries.

M42 exhibits excellent wear resistance by virtue of high heat-treated hardness (68 to 70 HRC), and the high cobalt content imparts the hot hardness. As such, the cutting edges on tools made from M42 super high speed steel stay sharp and hard in heavy-duty and high-production cutting applications.


APPLICATIONS: Twist drills, taps, milling cutters, reamers, broaches, saws, knives, and thread rolling dies


COMPOSITION

C

Si

Cr

W

Mo

V

Co

1.08

0.45

3.85

1.50

9.50

1.20

8.00


SIMILAR BRAND

GB

JIS

DIN

ISO

W2Mo9Cr4VCo8

SKH59

1.3247

HS2-9-1-8


METALLURGY METHOD:

NON-VACUUM FURNACE + LF FURNACE + ESR

Temper

(℃)

Density (g/cm3)

Elastic Modulus (KN/mm2)

Thermal expansion coefficient (20℃)

Heat transfer coefficient(W/m℃)

Specific heat

(J/Kg℃))

20

8.18

230

22

395

400

8.10

215

1.18x10-6

27

485

600

8.03

201

1.95x10-6

25

525


PHYSICAL PROPERTYS:

MECHANICAL PROPERTYS:

Tool Bits

Broach

Gear cutter

Pinch

Taps,Saw

Grain Size

9-10

10-11

10-11

10-11

10-11

Hardened Hardness (HRC)

68-69

67-68

67-68

67-68

67-68


HEAT TREATMENT INSTRUCTIONS:

Preheating: Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1500-1600°F (816-871°C), and equalize.


Austenitizing (High Heat): Heat rapidly from the preheat.
Furnace: 2150-2175°F (1177-1191°C)
Salt: 2125-2150°F (1163-1177°C)

To maximize toughness, use the lowest temperature.
To maximize hot hardness, use the highest temperature.


Quenching: Pressurized gas, warm oil, or salt. For pressurized gas, a rapid quench rate to below 1000°F
(538°C) is critical to obtain the desired properties.
For oil, quench until black, about 900°F (482°C), then cool in still air to 150 -125°F (66-51°C).
For salt maintained at 1000-1100°F (538-593°C), equalize, then cool in still air to 150 -125°F (66-51°C).


Tempering: Temper immediately after quenching. Typical tempering range is 950-1050°F (510-566°C). Hold at temperature for 2 hours, then air cool to ambient temperature. Triple tempering is required.


ANNEALING

Annealing must be performed after hot working and before re-hardening.


STANDARD SIZE & SURFACE CONDITION

Round Bar: Diameter 1。5mm to 200mm

Flat Bar: Width ≤ 120mm

Plate: Width ≤ 1000mm, length ≤ 2000mm

Surface Condition: Black or Polished Bright (h9)


Hot Tags: high speed steel M42 for broach, manufacturers, suppliers, customized, price, pricelist, buy discount, in stock, free sample, made in China
Related Products
Copyright ? Dalian Jingtai Industry Trade Co.,Ltd All Rights Reserved.
辽宁11选5 可以上网赚钱的工作 山东群英会手机版 澳彩网彩票注册 彩票高賠率好平台 网赚代理广告词 上海时时乐 百胜彩票投注 2019有什么网赚项目 有没有什么靠谱的网赚