Harga Baja Stavax

Stavax Plastic Mould Steel

Characteristic

A through-hardening premium stainless mold steel with very good corrosion resistance and excellent polishability.
Stavax is an excellent choice for small to medium size tools where corrosion in production is unacceptable and where the requirements for good hygiene are high.

Standard

AISI – 420
DIN – 1.2083
JIS – SUS420J2
GB – T1220-2007
W-Nr – 1.2083

Equivalent

Standard				Assab	Bohler	Edelstahl Buderus	Thyssen	Hitachi
DIN	JIS	AISI
1.2083	SUS 420 J2	420		Stavax	M310	2083	2083	HPM38
1.2085		420+S		–	M304	21 MnCr 5	–
1.2162		–		Prexi	M100	–	2162
1.2311		P20		518	W330	2311 iso BM	2311
1.2312		P20+S		Holdax	M200	2312	2312
1.2316		–		RaMaxS	M300	–	2316
1.2738		P20+Ni		Impax	–	–	2738

Availability

Roundbar: 10mm – 220mm
Flat: 10mm – 100mm

Chemical Composition

Type	C	Cr	Mn	Si	S	P	Ni	V	–
Stavac	0.38	13.60	0.50	0.90	0.03	–	–	0.30
AISI 420	0.26-0.40	12.00-14.00	1.00	1.00	0.03	0.04	–	0.30
HPM38	0.38	13.60	0.50	0.75	0.03	P	Ni	0.30

Mechanical Properties

Properties		Stavax
Tensile Strength, Rm (MPa)		1780
Yield Strength, Rp (MPa)		1460
Elongation in 2″ (%)		–
Hardness (HRc)		45-52
Reduction of Area (%)		–
Charpy V-notch Impact Strength (toughness):
Longitudinal (ft/lb)		–
Transverse (ft/lb)		–

Physical Properties AISI 420

Properties		Stavax
Density (×1000 kg/m3)		7.64
Modulus of elasticity (GPa)		200
Thermal conductivity (100oC) [W/m.K]		24.9
Specific Heat (J/Kg.C)		460
Coefficient of thermal expansion		11.4×10-6

Hardness

Hardened & Tempered: 45 ~ 52HRC

Heat Treatment

Preheating:
600-850 ° 100 (1110-1560 ° F)Normally a minimum of Two preheating steps required.

Austenitizing:
100 ° 1000-1025 (1830 -1880 ° C) 1020 House usually 100 ° (1870 ° C). For a very large  Mould 1000 100 ° (1830 ° C) Recommended it.

Annealing: 
Protect the steel and heat through to 740 ° C(1365 ° F). Then cool in the furnace at 15 ° C (30 ° F)per hour to 550 ° C (1020 ° F), then freely in air.

Stress relieving: 
After rough machining the tool should be heated through to 650 ° C (1200 ° C), holding time 2 hours.Cool slowly to 500 ° C (930 ° F), then freely in air.

Tempering: 
Tempering at 250-300 ° C (480-570 ° F) results in the best combination of toughness, hardness and corrosion resistance.Holding time at that temperature is minimum 2 hours. HOWEVER, for very large molds  it is recommended to use a high tempering temperature to Reduce the residual stresses to a minimum.

Quenching:  
Interrupted oil to below 1000F (540C). Air cool to 150F (65C). Salt bath at 250–550°C, then cool in Airblast.

Applications

For all type of moulds, especially suited for larger tools where corrosion in production is unacceptable and where high surface finish is required
Molding of corrosive plastics such as PVC, Acetates and for molds that runs under humid working and storage condition, Molding of medical components such as syringes and analysis vials,etc.

Reference:

Material Stavax| SUS 420J2| 3Cr13| NAK80| 2316